Casale Media, Inc.

Canada

Back to Profile

1-39 of 39 for Casale Media, Inc. Sort by
Query
Aggregations
Jurisdiction
        World 26
        Canada 11
        United States 2
IPC Class
C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia 13
B01J 2/16 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain 10
B01J 10/00 - Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particlesApparatus specially adapted therefor 5
B01J 2/18 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic using a vibrating apparatus 5
B01J 19/24 - Stationary reactors without moving elements inside 4
See more
Found results for  patents

1.

A PROCESS FOR SYNTHESIS OF UREA AND A RELATED ARRANGEMENT FOR A REACTION SECTION OF A UREA PLANT

      
Application Number EP2012072669
Publication Number 2013/083378
Status In Force
Filing Date 2012-11-15
Publication Date 2013-06-13
Owner UREA CASALE SA (Switzerland)
Inventor
  • Sioli, Giancarlo
  • Cavuoti, Giacomo

Abstract

A process for synthesis of urea and a related reaction section of a urea plant, where: ammonia and carbon dioxide are reacted in a liquid phase in a first reaction zone (S1) and heat (Q1) is withdrawn from said first reaction zone to promote the formation of ammonium carbamate, the liquid product (103) from said first reaction zone is then passed to a second reaction zone (S2) distinguished from said first reaction zone, and heat (Q2) is added to said second reaction zone to promote the decomposition of ammonium carbamate into urea and water, where the liquid phase in at least one of said first reaction zone and second reaction zone is kept in a stirred condition. A downflow reactor for carrying out the above process is also disclosed.

IPC Classes  ?

  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia

2.

A CARBON DIOXIDE STRIPPING UREA PLANT WITH A NATURAL-CIRCULATION SYNTHESIS LOOP AND A METHOD FOR RETROFITTING SUCH PLANT.

      
Application Number EP2012057531
Publication Number 2013/034319
Status In Force
Filing Date 2012-04-25
Publication Date 2013-03-14
Owner UREA CASALE SA (Switzerland)
Inventor Pennino, Lorenzo

Abstract

A plant for synthesis of urea with a CO2-stripping process, comprising a natural-circulation synthesis loop, said loop including at least a urea reactor (1), a carbon dioxide stripper (2) and a condenser (3), said reactor, stripper and condenser operating substantially at the same elevated pressure, said loop comprising also a reactor effluent flow line (5), connecting said urea reactor to said stripper, which comprises means (15) for directly or indirectly detecting the flow rate and/or the direction of the flow through said reactor effluent flow line (5).

IPC Classes  ?

  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
  • B01J 19/24 - Stationary reactors without moving elements inside

3.

PROCESS AND PLANT FOR AMMONIA-UREA PRODUCTION

      
Application Number EP2012052276
Publication Number 2012/126673
Status In Force
Filing Date 2012-02-10
Publication Date 2012-09-27
Owner UREA CASALE SA (Switzerland)
Inventor
  • Filippi, Ermanno
  • Badano, Marco
  • Zardi, Federico
  • Scotto, Andrea

Abstract

A process for ammonia -urea production where: liquid ammonia produced in an ammonia section is fed to a urea section directly at the ammonia synthesis pressure, and where the liquid ammonia is purified at high pressure with the steps of: cooling the liquid ammonia (20) obtaining a cooled liquid ammonia stream (21), separating a gaseous fraction (22) comprising hydrogen and nitrogen from said cooled liquid ammonia, obtaining purified liquid ammonia (23) at a high pressure, and reheating said purified liquid ammonia (23) after separation of said gaseous fraction, obtaining a reheated purified ammonia (24) having a temperature suitable for feeding to the urea synthesis process. The application also deals with an ammonia -urea plant comprising an ammonia cooler, a liquid-gas separator and an ammonia re-heater and with a method for revamping existing ammonia -urea plants.

IPC Classes  ?

  • C01C 1/04 - Preparation of ammonia by synthesis
  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia

4.

PROCESS AND APPARATUS FOR PRODUCTION OF A GRANULAR UREA PRODUCT

      
Application Number EP2012053370
Publication Number 2012/119891
Status In Force
Filing Date 2012-02-28
Publication Date 2012-09-13
Owner UREA CASALE SA (Switzerland)
Inventor Bedetti, Gianfranco

Abstract

A process for production of a granular urea product in a fluidized-bed where: small droplets (10) of fresh urea melt are contacted with a cooling medium to form solid particles, said solid particles (11) are contacted with droplets of urea melt (12) which are larger than said germ particles, the solid particles and said droplets forming together larger solid particles (13), and said solid particles further increasing their size step by step and upon contact with droplets of urea melt, until the solid particles reaches a given size, and said solid particles are then subject to a further growing process by contact with liquid droplets now smaller than the solid particles, until a desired size of the granular product is reached.

IPC Classes  ?

  • B01J 2/04 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
  • B01J 2/16 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
  • C05C 9/00 - Fertilisers containing urea or urea compounds

5.

FLUID BED GRANULATION OF UREA AND RELATED APPARATUS

      
Application Number EP2011071872
Publication Number 2012/113473
Status In Force
Filing Date 2011-12-06
Publication Date 2012-08-30
Owner UREA CASALE SA (Switzerland)
Inventor Bedetti, Gianfranco

Abstract

A process for preparation of a granular urea product by granulating a urea solution in a fluidized bed, where the granulation process takes place along a substantially longitudinal growth path, from a granulation starting end (1S) to a product discharge end (1E) of said fluidized bed, and said urea solution enters the fluidized bed by means of several urea inputs (2A, 2B, 2C) taken from a main urea feed (2), where an additive (6) is mixed with said urea solution said additive has a non-uniform concentration in said urea inputs, so that at least two of said urea inputs have a different concentration of additive.

IPC Classes  ?

  • B01J 2/16 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
  • C05C 9/00 - Fertilisers containing urea or urea compounds

6.

PNEUMATIC HIGH-FREQUENCY TURBINE VIBRATOR SUITABLE FOR USE IN A PRILLING BUCKET

      
Application Number EP2011071288
Publication Number 2012/084431
Status In Force
Filing Date 2011-11-29
Publication Date 2012-06-28
Owner UREA CASALE SA (Switzerland)
Inventor
  • Rizzi, Enrico
  • Montini, Fabiano

Abstract

A pneumatic turbine vibrator (100) comprising: a sealed casing (120), a first unbalanced turbine (105) and a second unbalanced turbine (106), said first turbine and second turbine being contained in said casing (120), at least one compressed air feed powering said turbines, said turbines being arranged to produce counter-rotating forces (F1, F2) that add up in a given vibration direction (A) and are balanced in directions other than said vibration direction. A prilling bucket comprising said vibrator is also disclosed.

IPC Classes  ?

  • B01J 2/18 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic using a vibrating apparatus
  • B06B 1/18 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency wherein the vibrator is actuated by pressure fluid

7.

METHOD FOR REVAMPING A SELF-STRIPPING UREA PLANT AND PROCESS FOR SYNTHESIS OF UREA

      
Application Number EP2011058741
Publication Number 2011/157530
Status In Force
Filing Date 2011-05-27
Publication Date 2011-12-22
Owner UREA CASALE SA (Switzerland)
Inventor
  • Scotto, Andrea
  • Gabbiadini, Serena
  • Bertini, Paolo

Abstract

A method for revamping a self-stripping urea plant is disclosed, where an intermediate recovery section (30) is installed between the existing high- pressure section and medium-pressure section; a stream of urea solution (15A), which is delivered by the high pressure section, is directed to said intermediate section (30), and a flow of concentrated solution (15B) from said intermediate section is directed to said medium pressure section, the intermediate section operating at a pressure between those of the high- and medium-pressure sections. A related process and plant are also disclosed.

IPC Classes  ?

  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
  • B01J 10/00 - Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particlesApparatus specially adapted therefor
  • B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes

8.

FALLING-FILM STRIPPER FOR CARBAMATE DECOMPOSITION

      
Application Number EP2011050796
Publication Number 2011/098335
Status In Force
Filing Date 2011-01-21
Publication Date 2011-08-18
Owner UREA CASALE SA (Switzerland)
Inventor
  • Scotto, Andrea
  • Visciotti, Damiano

Abstract

A stripper (SN) for carbamate decomposition and ammonia plus carbon dioxide recovery from a urea solution (U) is realized with a shell-and-tube heat exchanger, where a liquid falling film of urea solution and a counter- current gaseous flow of a stripping medium fed to a bundle of surface-heated tubes (6); the stripping medium such as carbon dioxide is distributed into the tubes (6) by a plurality of gas risers (32); the gas risers are preferably associated to a perforated tray (30) in the bottom chamber (11) of the stripper. Revamping of a conventional CO2 stripper is also disclosed.

IPC Classes  ?

  • B01D 1/06 - Evaporators with vertical tubes
  • B01D 1/14 - Evaporating with heated gases or vapours in contact with the liquid
  • B01D 3/04 - Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping pipe stills
  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
  • B01D 3/00 - Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping

9.

GRANULES CONTAINING FILAMENTARY FUNGI AND METHOD OF PREPARATION THEREOF

      
Application Number EP2010051944
Publication Number 2010/094689
Status In Force
Filing Date 2010-02-16
Publication Date 2010-08-26
Owner UREA CASALE S.A. (Switzerland)
Inventor Panchaud-Mirabel, Elisabeth

Abstract

In a method for preparing granules containing filamentary fungi, a filamentary fungi culture is mixed with at least one modified starch and a starchy flour, then fillers and possible nutrients are added to the obtained product, obtaining a paste that is subsequently subjected to granulation and drying.

IPC Classes  ?

  • A01N 63/04 - Microbial fungi;  Substances produced thereby or obtained therefrom
  • A01N 25/14 - Powders or granules wettable
  • A01P 5/00 - Nematocides

10.

IMPROVEMENT TO THE HIGH-PRESSURE LOOP IN A PROCESS FOR SYNTHESIS OF UREA

      
Application Number EP2009065294
Publication Number 2010/069691
Status In Force
Filing Date 2009-11-17
Publication Date 2010-06-24
Owner UREA CASALE S.A. (Switzerland)
Inventor
  • Zardi, Federico
  • Scotto, Andrea

Abstract

A process and a related plant layout for producing urea are disclosed, wherein the high-pressure loop (1) comprises a synthesis reactor (2), a thermal stripper (3), a condenser (4), and an adiabatic CO2 stripper (10) disposed upstream said thermal stripper, separating a vapour phase (13) containing ammonia from the urea solution (9) discharged from the reactor, and recycling said vapour phase to the reactor. The adiabatic stripper (10) can be incorporated in a reactor (200) having a top reaction zone and a bottom adiabatic stripping zone. A revamping method for a conventional urea plant in accordance with the inventive process is also disclosed.

IPC Classes  ?

  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia

11.

VIBRATING PRILLING BUCKET FOR GRANULATION OF A FLUID SUBSTANCE

      
Application Number EP2009062536
Publication Number 2010/052069
Status In Force
Filing Date 2009-09-28
Publication Date 2010-05-14
Owner
  • UREA CASALE S.A. (Switzerland)
  • TUTTLE PRILLING SYSTEMS (USA)
Inventor
  • Rizzi, Enrico
  • Snyder, Donald Malcolm
  • Montini, Fabiano

Abstract

A vibrating prilling bucket for granulation of a fluid substance, comprising a hub (11 ), an upper plate (12), a lower plate (13) and a perforated side wall (14), and further comprising a bottom casing (40) to prevent liquid loss. In a preferred embodiment, the casing is pressurized and hosts the vibration engine (30) of the bucket, providing also the air feed to said engine.

IPC Classes  ?

  • B01J 2/02 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
  • B01J 2/18 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic using a vibrating apparatus

12.

SPRAYING METHOD AND NOZZLE FOR ATOMIZATION OF A LIQUID

      
Application Number EP2009061590
Publication Number 2010/043450
Status In Force
Filing Date 2009-09-08
Publication Date 2010-04-22
Owner UREA CASALE S.A. (Switzerland)
Inventor Bedetti, Gianfranco

Abstract

A method for atomizing a liquid (L) in a spraying nozzle (1), wherein a gaseous phase (G) and said liquid (L) are fed to a mixing chamber (30) inside said nozzle (1), obtaining an emulsion of the gas in the liquid, the emulsion being under pressure inside said chamber and formed by gas bubbles enveloped by the liquid in a film state; the speed of the gaseous phase at the inlet of the mixing chamber is around the speed of sound or greater, and the atomized liquid is obtained by an expansion of said emulsion at the outlet of said chamber. A suitable nozzle (1) is also disclosed, comprising a mixing chamber (30) and a distribution device (D) adapted to provide appropriate gas and liquid feed to form said emulsion.

IPC Classes  ?

  • B05B 7/04 - Spray pistolsApparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
  • B01J 2/16 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain

13.

PROCESS AND PLANT FOR THE PRODUCTION OF A UREA SOLUTION FOR USE IN SCR PROCESS FOR REDUCTION OF NOX

      
Application Number EP2009059388
Publication Number 2010/012632
Status In Force
Filing Date 2009-07-21
Publication Date 2010-02-04
Owner UREA CASALE S.A. (Switzerland)
Inventor Zardi, Federico

Abstract

A process and a plant for the preparation of an acqueous solution of urea suitable for use in a SCR process for nitrogen oxides removal, wherein the urea solution from the recovery section of a urea plant is subject to at least one step of evaporation, separating a vapour stream containing water and ammonia, and obtaining a concentrated and substantially ammonia-free solution, and said concentrated solution is diluted to the concentration of urea suitable for use in the SCR process.

IPC Classes  ?

14.

PROCESS FOR PRODUCING HIGH-QUALITY MELAMINE FROM UREA

      
Application Number EP2009055825
Publication Number 2009/138450
Status In Force
Filing Date 2009-05-14
Publication Date 2009-11-19
Owner UREA CASALE S.A. (Switzerland)
Inventor Sioli, Giancarlo

Abstract

A process for high-pressure, liquid phase conversion of urea into melamine is disclosed, where molten urea is fed to a first reaction zone (S1 ) where the melamine melt is under mechanical agitation, and a heat input (Q1 ) is provided to maintain the endothermic reaction, and the liquid is then passed to a second reaction zone (S2) kept at a lower temperature and where further agitation is provided. Embodiments of plants adapted to carry out the process are also disclosed, including multiple stirred reactors in cascade and a single reactor with multiple internal compartments defining said first and second reaction zones.

IPC Classes  ?

  • C07D 251/60 - Preparation of melamine from urea or from carbon dioxide and ammonia

15.

PROCESS FOR THE PRODUCTION OF HIGH PURITY MELAMINE FROM UREA

      
Application Number EP2009001294
Publication Number 2009/109314
Status In Force
Filing Date 2009-02-24
Publication Date 2009-09-11
Owner UREA CASALE S.A. (Switzerland)
Inventor Sioli, Giancarlo

Abstract

The present invention concerns process for obtaining melamine at high purity characterized by comprising the steps of : - quenching a melamine melt, deprived of off-gases of the melamine synthesis and containing melamine impurities such as ammeline, ammelide and polycondensates, with an aqueous solution comprising ammonia under conditions such to substantially convert polycondensates into melamine, obtaining a melamine solution substantially free of polycondensates, recovering melamine from said melamine solution by melamine crystallisation, obtaining melamine crystals and a melamine crystallization mother liquor, - treating said crystallization melamine mother liquor under conditions such to convert at least a portion of its ammeline content into ammelide and melammine, obtaining a treated mother liquid having at least a reduced ammeline content. The invention also concerns a high-pressure non-catalytic plant for the production of high-purity melamine implementing the above process and apparatuses suitable to be used in this plant.

IPC Classes  ?

  • C07D 251/60 - Preparation of melamine from urea or from carbon dioxide and ammonia
  • C07D 251/62 - Purification of melamine
  • B01J 19/18 - Stationary reactors having moving elements inside

16.

FLUID BED GRANULATION PROCESS AND APPARATUS

      
Application Number EP2008010958
Publication Number 2009/086903
Status In Force
Filing Date 2008-12-19
Publication Date 2009-07-16
Owner UREA CASALE S.A. (Switzerland)
Inventor Zardi, Federico

Abstract

A fluid bed granulation process and apparatus, wherein a suitable fluid bed of a particulate material is maintained in a granulator (1) fed by an input flow (F) comprising a growth liquid (L) and by a flow (S1) of seeds adapted to promote the granulation, and wherein a part (F2) of said input flow (F) is taken upstream the feeding of the fluid bed, and used in a seeds generator (33), to produce the seeds for the fluid bed.

IPC Classes  ?

  • B01J 2/16 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain

17.

VIBRATING PRILLING BUCKET FOR GRANULATION OF A FLUID SUBSTANCE

      
Application Number EP2008010018
Publication Number 2009/074225
Status In Force
Filing Date 2008-11-26
Publication Date 2009-06-18
Owner UREA CASALE S.A. (Switzerland)
Inventor Rizzi, Enrico

Abstract

A vibrating and rotating prilling bucket (15) for granulation of a fluid substance (U), said bucket (15) comprising a perforated side wall (15a) and vibrating devices (51, 52) arranged to deliver a force with constant direction (A-A). In a preferred embodiment, the vibrating unit comprise two counter-rotating vibrators delivering rotating forces which balance each other perpendicularly to said constant direction (A-A).

IPC Classes  ?

  • B01J 2/02 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
  • B01J 2/18 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic using a vibrating apparatus

18.

PROCESS AND PLANT FOR UREA PRODUCTION

      
Application Number EP2007008611
Publication Number 2009/043365
Status In Force
Filing Date 2007-10-04
Publication Date 2009-04-09
Owner UREA CASALE S.A. (Switzerland)
Inventor
  • Zardi, Federico
  • Debernardi, Sergio

Abstract

A process for producing urea is disclosed, wherein liquid ammonia and carbon dioxide are reacted in a high-pressure synthesis section (100), and at least part of the carbon dioxide is fed to said synthesis section (100) in liquid phase. A plant operating according to said process and a method for modernizing existing plants accordingly are also disclosed.

IPC Classes  ?

  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
  • B01J 10/00 - Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particlesApparatus specially adapted therefor

19.

GRANULATION PROCESS AND APPARATUS

      
Application Number EP2008004521
Publication Number 2009/000395
Status In Force
Filing Date 2008-06-06
Publication Date 2008-12-31
Owner UREA CASALE S.A. (Switzerland)
Inventor Rizzi, Enrico

Abstract

A granulation process wherein a liquid is sprayed into a prilling tower (1) by means of a rotating prilling bucket (15) having a perforated side wall (15a), and the liquid jets exiting said perforated side wall are subjected to a vibrating action according to the axial direction (A-A) of the prilling tower (1), while the remaining liquid mass inside the bucket is kept substantially free from said vibrating action. A suitable apparatus is also disclosed, wherein the peripheral side wall (15a) of the prilling bucket (15) is connected to vibration imparting means and has a flexible connection with the frame (15b, 15c) of the bucket.

IPC Classes  ?

  • B01J 2/04 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
  • B01J 2/18 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic using a vibrating apparatus
  • B05B 3/10 - Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member
  • B05B 17/06 - Apparatus for spraying or atomising liquids or other fluent materials, not covered by any other group of this subclass operating with special methods using ultrasonic vibrations

20.

Method for producing pure melamine

      
Application Number 11547573
Grant Number 07741481
Status In Force
Filing Date 2005-04-12
First Publication Date 2008-11-06
Grant Date 2010-06-22
Owner UREA CASALE SA (Switzerland)
Inventor Ruech, Wolfgang

Abstract

2 are subsequently removed from the obtained melamine solution and that alkali is added to said melamine solution and the mixture is then left to rest, whereby pure melamine is obtained by crystallization. Thus a melamine can be obtained with the same quality as that produced in known comparative methods, using smaller quantities of alkali.

IPC Classes  ?

  • C07D 251/60 - Preparation of melamine from urea or from carbon dioxide and ammonia
  • C07D 251/62 - Purification of melamine

21.

PROCESS AND PLANT FOR THE PRODUCTION OF AN AQUEOUS SOLUTION COMPRISING UREA

      
Application Number EP2008000698
Publication Number 2008/092647
Status In Force
Filing Date 2008-01-30
Publication Date 2008-08-07
Owner UREA CASALE S.A. (Switzerland)
Inventor Zardi, Federico

Abstract

The present invention regards a process for the production of an aqueous solution comprising urea for use in the removal of nitrogen oxides from combustion gas or fumes, the process being characterised in that it comprises the steps of : - subjecting at least a part of a urea-concentrated aqueous solution comprising residual free ammonia, obtained directly from or downstream of a recovery section of a plant for the production of urea, to washing with carbon dioxide, so obtaining a first vapour phase comprising carbon dioxide and optionally ammonia and a urea-concentrated aqueous solution comprising carbamate and essentially lacking in free ammonia, and - diluting said urea-concentrated aqueous solution comprising carbamate and essentially lacking in free ammonia with water until the desired concentration of urea in aqueous solution is reached.

IPC Classes  ?

  • C07C 273/16 - SeparationPurification
  • B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes

22.

FLUID BED GRANULATION PROCESS

      
Application Number EP2007011366
Publication Number 2008/092499
Status In Force
Filing Date 2007-12-21
Publication Date 2008-08-07
Owner UREA CASALE S.A. (Switzerland)
Inventor Bedetti, Gianfranco

Abstract

Fluid bed granulation process comprising the steps of: - forming a fluid bed of seeds (Sl) of a chosen substance, - feeding said fluid bed with a continuous fluid flow (L) comprising a growth liquid, - inducing and maintaining a continuous vortex (V) in said fluid bed, the vortex (V) having a substantially horizontal axis, characterized in that said fluid flow (L) is fed into predetermined first zones (Zl) of said fluid bed, said first zones (Zl) being alternated to second zones (Z2) of said fluid bed in which said fluid flow (L) is not fed.

IPC Classes  ?

  • B01J 2/16 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain

23.

INTEGRATED PROCESS FOR UREA AND MELAMINE PRODUCTION

      
Application Number EP2007008732
Publication Number 2008/052640
Status In Force
Filing Date 2007-10-09
Publication Date 2008-05-08
Owner UREA CASALE S.A. (Switzerland)
Inventor
  • Zardi, Federico
  • Sticchi, Paolo
  • Brunengo, Paolo

Abstract

In an integrated process for urea and melamine production, urea is produced in a urea plant (10) comprising a high pressure urea synthesis section (11) from which an aqueous solution comprising urea, ammonium carbonate and ammonia is obtained and a urea recovery section (21) operating at low pressure, and melamine is produced in a melamine plant (40) wherein off-gases resulting as by-products of the melamine synthesis are discharged from said plant at a medium pressure and recycled to the high-pressure urea synthesis section (11).

IPC Classes  ?

  • C07C 273/12 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds combined with the synthesis of melamine

24.

PROCESS FOR UREA PRODUCTION AND RELATED PLANT

      
Application Number EP2007008730
Publication Number 2008/052639
Status In Force
Filing Date 2007-10-09
Publication Date 2008-05-08
Owner UREA CASALE S.A. (Switzerland)
Inventor
  • Zardi, Federico
  • Sticchi, Paolo
  • Brunengo, Paolo

Abstract

A process for urea production from ammonia and carbon dioxide, in which part of the aqueous solution comprising urea, ammonium carbamate and ammonia obtained in a urea synthesis section is subjected to dissociation in a treatment section operating at a predetermined medium pressure for the recovery of the ammonium carbamate and of the ammonia contained in it, comprises the steps of subjecting the urea aqueous solution resulting from the aforementioned dissociation step to decomposition in a low pressure urea recovery section and of using at least a part of the condensed steam, obtained by indirect thermal exchange with a second part of said aqueous solution comprising urea, ammonium carbmate and ammonia in a high- pressure stripping unit, as a heating fluid for the dissociation of the first part of the aqueous solution comprising urea, ammonium carbmate and ammonia in the medium-pressure treatment section.

IPC Classes  ?

  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia

25.

Method for producing granules containing fungi of the moniliales family

      
Application Number 10597894
Grant Number 08759056
Status In Force
Filing Date 2005-02-08
First Publication Date 2007-12-20
Grant Date 2014-06-24
Owner Urea Casale SA (Switzerland)
Inventor Panchaud-Mirabel, Elisabeth

Abstract

A process for the production of granules or pellets containing filamentous fungi is described comprising the steps of selecting and growing filamentous fungi in a suitable culture medium for a predetermined amount of time, adding a gelling agent and at least one carrier to said culture medium, so as to obtain a mixture, subjecting said mixture to gelling through contact, drop by drop, with a solution containing a calcium salt thus obtaining gelled pellets or granules containing said filamentous fungi and drying said gelled pellets or granules to a moisture content of 13-18%.

IPC Classes  ?

  • C12N 11/02 - Enzymes or microbial cells immobilised on or in an organic carrier
  • C12N 11/10 - Enzymes or microbial cells immobilised on or in an organic carrier the carrier being a carbohydrate
  • C12N 11/04 - Enzymes or microbial cells immobilised on or in an organic carrier entrapped within the carrier, e.g. gel or hollow fibres
  • C12N 1/14 - Fungi Culture media therefor
  • C12N 1/04 - Preserving or maintaining viable microorganisms
  • A01N 63/04 - Microbial fungi;  Substances produced thereby or obtained therefrom

26.

PROCESS FOR UREA PRODUCTION AND RELATED PLANT

      
Document Number 02606357
Status In Force
Filing Date 2006-04-06
Open to Public Date 2006-11-09
Grant Date 2013-08-06
Owner UREA CASALE S.A. (Switzerland)
Inventor
  • Zardi, Federico
  • Sticchi, Paolo
  • Brunengo, Paolo

Abstract

A process for urea production from ammonia and carbon dioxide, in which part of the aqueous solution comprising urea, ammonium carbamate and ammonia obtained in a urea synthesis section is subjected to dissociation in a treatment section operating at a predetermined medium pressure for the recovery of the ammonium carbamate and of the ammonia contained in it, comprises the step of subjecting the urea aqueous solution resulting from the aforementioned dissociation step to decomposition in a low pressure urea recovery section.

IPC Classes  ?

  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia

27.

PROCESS FOR UREA PRODUCTION AND RELATED PLANT

      
Application Number EP2006003121
Publication Number 2006/117050
Status In Force
Filing Date 2006-04-06
Publication Date 2006-11-09
Owner UREA CASALE S.A. (Switzerland)
Inventor
  • Zardi, Federico
  • Sticchi, Paolo
  • Brunengo, Paolo

Abstract

A process for urea production from ammonia and carbon dioxide, in which part of the aqueous solution comprising urea, ammonium carbamate and ammonia obtained in a urea synthesis section is subjected to dissociation in a treatment section operating at a predetermined medium pressure for the recovery of the ammonium carbamate and of the ammonia contained in it, comprises the step of subjecting the urea aqueous solution resulting from the aforementioned dissociation step to decomposition in a low pressure urea recovery section.

IPC Classes  ?

  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia

28.

PROCESS FOR UREA PRODUCTION AND RELATED PLANT

      
Document Number 02599822
Status In Force
Filing Date 2005-11-15
Open to Public Date 2006-09-14
Grant Date 2013-12-31
Owner UREA CASALE S.A. (Switzerland)
Inventor
  • Romiti, Domenico
  • Sticchi, Paolo

Abstract

A process for urea production from ammonia and carbon dioxide, made to react at a predetermined high pressure in an appropriate synthesis reactor (112), from the reaction between NH3 and C02 being obtained a reaction mixture comprising urea, ammonium carbamate and free ammonia in aqueous solution, from which a recovery of ammonium carbamate and ammonia is carried out with their subsequent recycle to the synthesis reactor (112), said recovery from the reaction mixture taking place through operative steps of decomposition of the ammonium carbamate into NH3 and CO2 and of their stripping and a subsequent operative step of their recondensation into ammonium carbamate that is recycled to the synthesis reactor, the said reaction mixture obtained from the reaction between ammonia and carbon dioxide being pumped to the operative steps of decomposition and stripping.

IPC Classes  ?

  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
  • B01J 10/00 - Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particlesApparatus specially adapted therefor
  • B01J 19/24 - Stationary reactors without moving elements inside

29.

PROCESS FOR UREA PRODUCTION AND RELATED PLANT

      
Application Number EP2005012252
Publication Number 2006/094541
Status In Force
Filing Date 2005-11-15
Publication Date 2006-09-14
Owner UREA CASALE S.A. (Switzerland)
Inventor
  • Romiti, Domenico
  • Sticchi, Paolo

Abstract

A process for urea production from ammonia and carbon dioxide, made to react at a predetermined high pressure in an appropriate synthesis reactor (112), from the reaction between NH3 and C02 being obtained a reaction mixture comprising urea, ammonium carbamate and free ammonia in aqueous solution, from which a recovery of ammonium carbamate and ammonia is carried out with their subsequent recycle to the synthesis reactor (112), said recovery from the reaction mixture taking place through operative steps of decomposition of the ammonium carbamate into NH3 and CO2 and of their stripping and a subsequent operative step of their recondensation into ammonium carbamate that is recycled to the synthesis reactor, the said reaction mixture obtained from the reaction between ammonia and carbon dioxide being pumped to the operative steps of decomposition and stripping.

IPC Classes  ?

  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
  • B01J 10/00 - Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particlesApparatus specially adapted therefor
  • B01J 19/24 - Stationary reactors without moving elements inside

30.

PROCESS AND DEVICE FOR FLUIDIZED BED GRANULATION

      
Application Number EP2006001502
Publication Number 2006/094620
Status In Force
Filing Date 2006-02-20
Publication Date 2006-09-14
Owner UREA CASALE S.A. (Switzerland)
Inventor
  • Bedetti, Gianfranco
  • Burlando, Carla

Abstract

A fluid bed granulation process of a predetermined substance is characterized in that it comprises the steps of: - making a first fluid bed (Zl) of granules of the substance through a respective first flow (Al) I of fluidizing air; - feeding a granule growth substance (L) in liquid state into the first fluid bed (Zl) ; - inducing, in the first fluid bed (Zl) , the formation of at least one substantially vortex-shaped circulatory movement (Vl) of the granules (Sl) of the predetermined substance and maintaining it, the vortex-shaped movement extending helically, with substantially horizontal axis, from an end of the bed (Zl) , at which seeds of the substance are continuously fed, to an opposite end thereof, for discharging the granules (S2) obtained; - forming a second fluid bed (Z2), structurally independent from the first bed (Zl), with the granules (S2) thus obtained in the first bed (Zl) and through a respective second flow of fluidizing air (A2), - feeding a continuous flow of the granule growth substance (L) m liquid state into the second fluid bed (Z2); - inducing, in the second fluid bed (Z2), the formation of at least one substantially cylindrical vortex- shaped circulatory movement (V2) , with horizontal axis, of the granules of substance of which it is formed and maintaining it; - recovering the granules of substance (S3) of predetermined grain size from the second bed.

IPC Classes  ?

  • B01J 2/16 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain

31.

PROCESS FOR UREA PRODUCTION FROM AMMONIA AND CARBON DIOXIDE

      
Document Number 02575537
Status In Force
Filing Date 2005-07-22
Open to Public Date 2006-02-16
Grant Date 2013-09-10
Owner UREA CASALE S.A. (Switzerland)
Inventor
  • Romiti, Domenico
  • Sticchi, Paolo

Abstract

A process for urea production comprises a first process step in which ammonia (7) and carbon dioxide (6) are obtained, subjecting natural gas (1) to reforming treatments (12, 14), and a second step of urea (8a) production from such ammonia (7) and from carbon dioxide, through a formation of a solution comprising urea and ammonium carbamate in a urea synthesis reactor (20) and a subsequent decomposition of the ammonium carbamate and. urea recovery, the process comprises the steps of: - treating combustion smokes (5) comprising carbon dioxide with an aqueous solution (9a) comprising a part (7b) of such ammonia (7), obtaining an aqueous ammonium carbamate solution (9c) ; - supplying the solution (9c) thus obtained to the second process step.

IPC Classes  ?

  • C07C 273/10 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds combined with the synthesis of ammonia
  • C01B 3/02 - Production of hydrogen or of gaseous mixtures containing hydrogen
  • C01C 1/04 - Preparation of ammonia by synthesis

32.

FLUID BED GRANULATION PROCESS

      
Document Number 02563423
Status In Force
Filing Date 2005-02-24
Open to Public Date 2005-10-20
Grant Date 2012-08-07
Owner UREA CASALE S.A. (Switzerland)
Inventor Bedetti, Gianfranco

Abstract

A fluid bed granulation process of a predetermined substance comprises the steps of: forming, through a fluidification. air flow of predetermined flow rate, a fluid bed of granules of said substance to be granulated fed to it in the form of seeds, - feeding said fluid bed with a continuous flow of a growth substance (or liquid).

IPC Classes  ?

  • B01J 2/16 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
  • B01J 8/44 - Fluidisation grids

33.

APPARATUS FOR PROCESSING HIGHLY CORROSIVE AGENTS

      
Document Number 02557035
Status In Force
Filing Date 2005-02-24
Open to Public Date 2005-10-13
Grant Date 2011-06-21
Owner UREA CASALE S.A. (Switzerland)
Inventor Romiti, Domenico

Abstract

An apparatus for treating highly corrosive agents comprises a tube bundle (14) heat exchanger (10), structured to carry out a heat exchange between two fluids one of which is highly corrosive and flowing inside of said tube bundle (14).

IPC Classes  ?

  • F28F 19/06 - Preventing the formation of deposits or corrosion, e.g. by using filters by using coatings, e.g. vitreous or enamel coatings of metal
  • C01B 21/12 - Carbamic acidSalts thereof
  • C01C 1/04 - Preparation of ammonia by synthesis
  • F28F 21/08 - Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal

34.

A CULTURE MEDIUM FOR THE PRODUCTION OF FILAMENTARY FUNGI

      
Document Number 02555599
Status In Force
Filing Date 2005-02-08
Open to Public Date 2005-08-25
Grant Date 2013-01-08
Owner UREA CASALE S.A. (Switzerland)
Inventor Panchaud-Mirabel, Elisabeth

Abstract

A culture medium for filamentary fungi comprising at least one carbon source chosen from the group consisting of molasses, malt extract and sucrose and at least one organic nitrogen source chosen from yeast extract and corn steep liquor is described; a method for producing filamentary fungi, in particular nematophagus fungi on an industrial scale, comprising the step of seeding conidia of such fungi in the aforementioned culture medium and maintaining such a culture medium at a temperature of 23-30~C for a time of 5 to ~10 days to determine the reproduction and growth of the fungi is also described.

IPC Classes  ?

35.

CARBAMATE CONDENSATION METHOD AND UNIT FOR CARRYING OUT SUCH A METHOD

      
Document Number 02481154
Status In Force
Filing Date 2004-09-10
Open to Public Date 2005-03-19
Grant Date 2011-11-15
Owner UREA CASALE S.A. (Switzerland)
Inventor Pennino, Lorenzo

Abstract

Method for carbamate condensation of a carbon dioxide/ammonia gaseous phase in a liquid phase in a condensation unit of the so-called submerged type comprising a heat exchange tube bundle having a predetermined number of tubes intended for carbamate condensation, wherein the gaseous phase and the liquid phase are fed contemporaneously and independently to each of the tubes intended for condensation.

IPC Classes  ?

  • B01D 5/00 - Condensation of vapoursRecovering volatile solvents by condensation
  • B01J 10/00 - Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particlesApparatus specially adapted therefor
  • B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus
  • B01J 19/24 - Stationary reactors without moving elements inside
  • C07C 273/04 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
  • F28F 27/02 - Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels

36.

FLUID BED GRANULATION PROCESS AND APPARATUS

      
Document Number 02528854
Status In Force
Filing Date 2004-05-19
Open to Public Date 2005-01-13
Grant Date 2011-04-12
Owner UREA CASALE S.A. (Switzerland)
Inventor Bedetti, Gianfranco

Abstract

A process for obtaining finished granules of a predetermined substance in a granulation fluid bed (F1) of the so-called vertical growth type, the bed being formed and maintained by a respective flow of fluidification air, comprises a transfer phase by falling of the finished granules in a pressurized space below the granulation bed and a recovery phase of the finished granules from the pressurized space.

IPC Classes  ?

  • B01J 2/16 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
  • B01J 8/28 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations the one above the other

37.

FLUID BED GRANULATION PROCESS AND APPARATUS

      
Document Number 02528856
Status In Force
Filing Date 2004-05-19
Open to Public Date 2005-01-13
Grant Date 2011-03-29
Owner UREA CASALE S.A. (Switzerland)
Inventor Bedetti, Gianfranco

Abstract

Fluid bed granulation process comprising the step of cooling the granules in a cooling fluid bed (F2). At least part of the fluidizing air coming out from said cooling fluid bed (F2) is fed into the granulation fluid bed (F1).

IPC Classes  ?

  • B01J 2/16 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
  • B01J 8/28 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations the one above the other

38.

FLUID BED GRANULATION PROCESS AND APPARATUS

      
Document Number 02528857
Status In Force
Filing Date 2004-05-19
Open to Public Date 2005-01-13
Grant Date 2011-05-03
Owner UREA CASALE S.A. (Switzerland)
Inventor Bedetti, Gianfranco

Abstract

Fluid bed granulation process of an appropriate substance, comprising the cooling in a second fluid bed of the granules obtained. The same flow of fluidification air is used to form and support both fluid beds.

IPC Classes  ?

  • B01J 2/16 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
  • B01J 8/28 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations the one above the other

39.

GRANULATION APPARATUS

      
Document Number 02498979
Status In Force
Filing Date 2004-04-27
Open to Public Date 2004-11-25
Grant Date 2011-06-14
Owner
  • TUTTLE PRILLING SYSTEMS (USA)
  • UREA CASALE S.A. (Switzerland)
Inventor
  • Snyder, Donald Malcolm
  • Rizzi, Enrico

Abstract

Apparatus for the granulation of a predetermined substance provided in fluid, semi-fluid and similar state, comprising a prilling tower having a prilling bucket (15) associated to a driving shaft (14). The prilling bucket is mounted in a sliding way on the driving shaft. A device (27) for applying vibration is directly associated with said bucket.

IPC Classes  ?

  • B01J 2/04 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
  • B01J 2/18 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic using a vibrating apparatus
  • B05B 3/10 - Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member
  • B05B 17/06 - Apparatus for spraying or atomising liquids or other fluent materials, not covered by any other group of this subclass operating with special methods using ultrasonic vibrations