The invention relates to a method for preferably adiabatic nitration of nitratable aromatic organic compounds (aromatics) and to a corresponding plant, in particular a production plant (nitration plant) for carrying out said method.
The invention relates to a method and to a device for removing contaminants arising during the production of aliphatic or alicyclic nitric acid esters, in particular for removing contaminants from nitrated crude nitric acid esters, which nitrated crude nitric acid esters arise during the nitration of monovalent or multivalent aliphatic or alicyclic alcohols capable of nitration, after the separation of the final nitrating acid, and to a production system for nitrating monovalent or multivalent aliphatic alcohols capable of nitration with subsequent purification of the nitrated nitric acid esters.
The invention relates to a method for preferably adiabatic nitriding of nitrable aromatic organic compounds (aromates) and to a corresponding system, in particular a production plant (nitration plant) for carrying out said method.
The invention relates to a method for preferably adiabatic nitriding of nitrable aromatic organic compounds (aromates) and to a corresponding system, in particular a production plant (nitration plant) for carrying out said method.
The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dinitrotoluene, characterized in that (a) the raw dinitrotoluenes are first subjected to a wash with at least one washing medium after separation of the nitrating acid mixture, followed by a separation of the washing medium; and that (b) subsequently the washed dinitrotoluenes resulting from method step (a) are subjected to stripping (stripping gas treatment) with at least one gas (stripping gas).
The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dinitrotoluene, characterized in that (a) the raw dinitrotoluenes are first subjected to a wash with at least one washing medium after separation of the nitrating acid mixture, followed by a separation of the washing medium; and that (b) subsequently the washed dinitrotoluenes resulting from method step (a) are subjected to stripping (stripping gas treatment) with at least one gas (stripping gas).
01 - Chemical and biological materials for industrial, scientific and agricultural use
02 - Paints, varnishes, lacquers
07 - Machines and machine tools
09 - Scientific and electric apparatus and instruments
13 - Firearms; explosives
16 - Paper, cardboard and goods made from these materials
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
Chemicals used in industry, science and photography, as well as in agriculture and forestry; Fire extinguishing compositions; Synthetic resins, unprocessed; Chemical substances for preserving foodstuffs; Tanning substances; Tempering and soldering preparations; Adhesives used in industry; Manures; Unprocessed plastics. Colorants; Varnish; Dyestuffs; Metal in foil and powder form; Preservatives; Raw natural resins; Varnish; Mordants; Preparations for preventing the deterioration of wood; Preservatives against rust. Automatic vending machines; Machines and machine tools, namely machines for the chemical industry, machines for artificial resins, machines for polymer dispersions; Machine tools, namely machine tools for the chemical industry, machine tools for artificial resins, machine tools for polymer dispersions; Machine coupling and transmission components (except for land vehicles); Agricultural implements other than hand-operated; Motors and engines (other than for land vehicles); Machines for explosives. Computers; Mechanisms for coin-operated apparatus; Magnetic recordings; digital recording devices; Cash registers; CDs; Recording discs; Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; Fire-extinguishing apparatus; Computer software; Calculators; DVDs; Data processing equipment; Apparatus for recording, transmission or reproduction of sound or images. Explosive substances, other than weapons; Explosive devices, other than weapons; Parts for explosive substances; Parts for explosive devices; Accessories for explosive substances; Accessories for explosive devices. Printing blocks; Teaching material (except apparatus); Bookbinding material; Typewriters; Office articles (except furniture); Photographs; Millboard; Printers' type; Artists' materials; Instructional material (except apparatus); Paint brushes; Paper; Plastic materials for packaging (not included in other classes); Adhesives for stationery or household purposes; Stationery; Printed matter. Building construction; Advisory services relating to vehicle maintenance; Refurbishment of buildings; Apartment refurbishment services; Building repair; Assembling [installation] of building framework; Assembly [installation] of accessories for vehicles; Assembling [installation] of shelving; Assembling [installation] of storage systems; Assembling [installation] of machine plant; Assembly [installation] of parts for vehicles; Office equipment installation; Aeroplane repair; Resurfacing of roofs; Furniture repair; Warehouse construction and repair; Renovation and repair of buildings; Renovation and repair of buildings. Material treatment information; Vulcanization [material treatment]; Treatment of materials using chemicals; Treatment of materials by laser beam; Surface polishing; Providing material treatment information; Material treatment information; Material treatment information; Metallurgical processing; Providing material treatment information; Treatment of materials for the manufacture of ceramic goods; Heat treatment and coating of steel; Vulcanization [material treatment]; Providing material treatment information. Industrial analysis and research services; Design and development of computer hardware and software.
8.
Process for acidic scrubbing of dinitrotoluene in the presence of hydrocyanic acid
Process for scrubbing a crude mixture which is obtained in the nitration of toluene after separating off the nitrating acid and comprises dinitrotoluene, nitric acid, nitrogen oxides and sulfuric acid, which comprises two scrubbing steps (WS-I) and (WS-II), wherein
i) in a first scrubbing step (WS-I), the crude mixture is extracted with a scrubbing acid I comprising nitric acid, nitrogen oxides and sulfuric acid in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (WS-I-1) of the first scrubbing step (WS-I) has a total acid content of from 10 to 40% by weight and a content of from 80 to 350 ppm of hydrocyanic acid, giving a prescrubbed crude mixture,
ii) in a second scrubbing step (WS-II), the prescrubbed crude mixture comprising dinitrotoluene is extracted with a scrubbing acid II in a scrub comprising at least one, preferably at least 2, extraction stage(s), where the scrubbing acid discharged from the first extraction stage (WS-II-1) of the second scrubbing step (WS-II) has a pH of less than or equal to 4, giving a dinitrotoluene-comprising mixture which is essentially free of nitric acid, sulfuric acid, nitrogen oxides and hydrocyanic acid and has a content of not more than 300 ppm of nitric acid and nitrogen oxides, not more than 3 ppm of sulfate and not more than 50 ppm of hydrocyanic acid.
C02F 103/36 - Nature of the water, waste water, sewage or sludge to be treated from the chemical industry not provided for in groups from the manufacture of organic compounds
9.
Method and device for removing contaminants arising during the production of aliphatic nitrate esters
The invention relates to a method and to a device for removing contaminants arising during the production of aliphatic or alicyclic nitric acid esters, in particular for removing contaminants from nitrated crude nitric acid esters, which nitrated crude nitric acid esters arise during the nitration of monovalent or multivalent aliphatic or alicyclic alcohols capable of nitration, after the separation of the final nitrating acid, and to a production system for nitrating monovalent or multivalent aliphatic alcohols capable of nitration with subsequent purification of the nitrated nitric acid esters.
01 - Chemical and biological materials for industrial, scientific and agricultural use
02 - Paints, varnishes, lacquers
03 - Cosmetics and toiletries; cleaning, bleaching, polishing and abrasive preparations
07 - Machines and machine tools
09 - Scientific and electric apparatus and instruments
16 - Paper, cardboard and goods made from these materials
19 - Non-metallic building materials
23 - Yarns and threads for textile use
24 - Textiles and textile goods
27 - Floor and wall coverings
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
Chemicals used in industry, science and photography, as well as in agriculture and forestry; Fire extinguishing compositions; Unprocessed artificial resins; Chemical substances for preserving foodstuffs; Tanning substances; Tempering and soldering preparations; Adhesives used in industry; Manures; Unprocessed plastics. Colorants; Varnish; Dyestuffs; Metal in foil and powder form; Preservatives; Raw natural resins; Varnish; Mordants; Preparations for preventing the deterioration of wood; Preservatives against rust. Soaps; Furbishing preparations; Grinding preparations; Bleaching preparations; Beauty care cosmetics; Laundry preparations; Grease-removing preparations; Hair lotion; Essential oils; Polishing preparations; Perfumery; Bodycare preparations; Dentifrices. Automatic vending machines; Machines for chemical industry, Machines for artificial resins, Machines for polymer dispersions, Machine tools for the chemical industry, machine tools for artificial resins, machine tools for polymer dispersions and machine tools; Machine coupling and transmission components (except for land vehicles); Agricultural implements other than hand-operated; Motors and engines (except for land vehicles). Computers; Mechanisms for coin-operated apparatus; Magnetic recordings; digital recording devices; Cash registers; CDs; Recording discs; Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; Fire-extinguishing apparatus; Computer software; Calculators; DVDs; Data processing equipment; Apparatus for recording, transmission or reproduction of sound or images. Printed matter; Printing blocks; Teaching material (except apparatus); Bookbinding material; Typewriters; Office requisites (except furniture); Photographs; Millboard; Printers' type; Artists' materials; Instructional material (except apparatus); Paint brushes; Paper; Plastic materials for packaging (not included in other classes); Adhesives for stationery or household purposes; Stationery. Non-metallic rigid pipes for building; Building material (non-metallic); Monuments, not of metal; Asphalt; Non-metallic transportable buildings; Asphalt; Pitch. Yarns and threads, for textile use. Textile goods, not included in other classes; Bed covers; Fabrics; Table covers. Mats; Linoleum; Wallpaper; Mats; Mats; Floor covering materials for existing floors. Building construction; Advisory services relating to vehicle maintenance; Refurbishment of buildings; Apartment refurbishment services; Building repair; Assembling [installation] of building framework; Assembly [installation] of accessories for vehicles; Assembling [installation] of shelving; Assembling [installation] of storage systems; Assembling [installation] of machine plant; Assembly [installation] of parts for vehicles; Office equipment installation; Aeroplane repair; Resurfacing of roofs; Furniture repair; Warehouse construction and repair; Renovation and repair of buildings; Renovation and repair of buildings. Material treatment information; Vulcanization [material treatment]; Treatment of materials using chemicals; Treatment of materials by laser beam; Surface polishing; Providing material treatment information; Material treatment information; Material treatment information; Metallurgical processing; Providing material treatment information; Treatment of materials for the manufacture of ceramic goods; Heat treatment and coating of steel; Vulcanization [material treatment]; Providing material treatment information. Industrial analysis and research services; Design and development of computer hardware and software.
01 - Chemical and biological materials for industrial, scientific and agricultural use
02 - Paints, varnishes, lacquers
03 - Cosmetics and toiletries; cleaning, bleaching, polishing and abrasive preparations
07 - Machines and machine tools
09 - Scientific and electric apparatus and instruments
16 - Paper, cardboard and goods made from these materials
19 - Non-metallic building materials
23 - Yarns and threads for textile use
24 - Textiles and textile goods
27 - Floor and wall coverings
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
Chemicals used in industry, science and photography, as well as in agriculture and forestry; Fire extinguishing compositions; Artificial resins, unprocessed; Chemical substances for preserving foodstuffs; Tanning substances; Tempering and soldering preparations; Adhesives used in industry; Manures; Unprocessed plastics. Colorants; Varnish; Dyestuffs; Metal in foil and powder form; Preservatives; Raw natural resins; Varnish; Mordants; Preparations for preventing the deterioration of wood; Preservatives against rust. Soaps; Furbishing preparations; Grinding preparations; Bleaching preparations; Beauty care cosmetics; Laundry preparations; Grease-removing preparations; Hair lotions; Essential oils; Polishing preparations; Perfumery; Bodycare preparations; Dentifrices. Automatic vending machines; Machines for chemical industry; Machines for artificial resins; Machines for polymer dispersions; Tools for machines and Machine tools; Machine coupling and transmission components (except for land vehicles); Agricultural implements other than hand-operated; Motors and engines (except for land vehicles). Computers; Mechanisms for coin-operated apparatus; Magnetic recordings; digital recording devices; Cash registers; CDs; Recording discs; Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life saving and teaching apparatus and instruments; Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; Fire-extinguishing apparatus; Computer software; Calculators; DVDs; Data processing hardware; Apparatus for recording, transmission or reproduction of sound or images. Printed matter; Printing blocks; Teaching material (except apparatus); Bookbinding material; Typewriters; Office requisites (except furniture); Photographs; Millboard; Printers' type; Artists' materials; Instructional material (except apparatus); Paint brushes; Paper; Plastic materials for packaging (not included in other classes); Adhesives for stationery or household purposes; Stationery. Non-metallic rigid pipes for building; Building material (non-metallic); Monuments, not of metal; Asphalt; Non-metallic transportable buildings; Asphalt; Pitch. Yarns and threads, for textile use. Textile goods, not included in other classes; Bed covers; Fabrics; Table covers. Mats; lino; Wallpaper; Mats; Mats; Floor covering materials for existing floors. Building construction; Advisory services relating to vehicle maintenance; Refurbishment of buildings; Apartment refurbishment services; Building repair; Assembling [installation] of building framework; Assembly [installation] of accessories for vehicles; Assembling [installation] of shelving; Assembling [installation] of storage systems; Assembling [installation] of machine plant; Assembly [installation] of parts for vehicles; Office equipment installation; Aeroplane repair; Resurfacing of roofs; Furniture repair; Warehouse construction and repair; Renovation and repair of buildings; Renovation and repair of buildings. Material treatment information; Vulcanization [material treatment]; Treatment of materials using chemicals; Treatment of materials by laser beam; Surface polishing; Providing material treatment information; Material treatment information; Material treatment information; Metallurgical processing; Providing material treatment information; Treatment of materials for the manufacture of ceramic goods; Heat treatment and coating of steel; Vulcanization [material treatment]; Providing material treatment information. Industrial analysis and research services; Design and development of computer hardware and software.
01 - Chemical and biological materials for industrial, scientific and agricultural use
02 - Paints, varnishes, lacquers
03 - Cosmetics and toiletries; cleaning, bleaching, polishing and abrasive preparations
07 - Machines and machine tools
09 - Scientific and electric apparatus and instruments
16 - Paper, cardboard and goods made from these materials
19 - Non-metallic building materials
23 - Yarns and threads for textile use
24 - Textiles and textile goods
27 - Floor and wall coverings
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
Chemicals used in industry, science and photography, as well as in agriculture and forestry; Fire extinguishing compositions; Artificial resins, unprocessed; Chemical substances for preserving foodstuffs; Tanning substances; Tempering and soldering preparations; Adhesives used in industry; Manures; Unprocessed plastics. Colorants; Varnish; Dyestuffs; Metal in foil and powder form; Preservatives; Raw natural resins; Varnish; Mordants; Preparations for preventing the deterioration of wood; Preservatives against rust. Soaps; Furbishing preparations; Grinding preparations; Bleaching preparations; Beauty care cosmetics; Laundry preparations; Grease-removing preparations; Hair lotions; Essential oils; Polishing preparations; Perfumery; Bodycare preparations; Dentifrices. Automatic vending machines; Machines and machine tools, namely machines for the chemical industry, machines for artificial resins, machines for polymer dispersions; Machine tools, namely machine tools for the chemical industry, machine tools for artificial resins, machine tools for polymer dispersions; Machine coupling and transmission components (except for land vehicles); Agricultural implements other than hand-operated; Motors and engines (except for land vehicles). Computers; Mechanisms for coin-operated apparatus; Magnetic recordings; digital recording devices; Cash registers; CDs; Recording discs; Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life saving and teaching apparatus and instruments; Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; Fire-extinguishing apparatus; Computer software; Calculators; DVDs; Data processing hardware; Apparatus for recording, transmission or reproduction of sound or images. Printing blocks; Teaching material (except apparatus); Bookbinding material; Typewriters; Office requisites (except furniture); Photographs; Millboard; Printers' type; Artists' materials; Instructional material (except apparatus); Paint brushes; Paper; Plastic materials for packaging (not included in other classes); Adhesives for stationery or household purposes; Stationery; Printed matter. Non-metallic rigid pipes for building; Building material (non-metallic); Monuments, not of metal; Asphalt; Non-metallic transportable buildings; Asphalt; Pitch. Yarns and threads, for textile use. Textile goods, not included in other classes; Bed covers; Fabrics; Table covers. Mats; lino; Wallpaper; Mats; Mats; Floor covering materials for existing floors. Building construction; Advisory services relating to vehicle maintenance; Refurbishment of buildings; Apartment refurbishment services; Building repair; Assembling [installation] of building framework; Assembly [installation] of accessories for vehicles; Assembling [installation] of shelving; Assembling [installation] of storage systems; Assembling [installation] of machine plant; Assembly [installation] of parts for vehicles; Office equipment installation; Aeroplane repair; Resurfacing of roofs; Furniture repair; Warehouse construction and repair; Renovation and repair of buildings; Renovation and repair of buildings. Material treatment information; Vulcanization [material treatment]; Treatment of materials using chemicals; Treatment of materials by laser beam; Surface polishing; Providing material treatment information; Material treatment information; Material treatment information; Metallurgical processing; Providing material treatment information; Treatment of materials for the manufacture of ceramic goods; Heat treatment and coating of steel; Vulcanization [material treatment]; Providing material treatment information. Industrial analysis and research services; Design and development of computer hardware and software.
13.
METHOD FOR REMOVING IMPURITIES FROM DINITROTOLUENES
The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dintrotoluene, characterized in that (a) the raw dinitrotoluenes are first subjected to a wash with at least one washing medium after separation of the nitrating acid mixture, followed by a separation of the washing medium; and that (b) subsequently the washed dintrotoluenes resulting from method step (a) are subjected to stripping (stripping gas treatment) with at least one gas (stripping gas).
The present invention relates to a method for removing impurities from nitrated crude products obtained during the nitration of nitratable aromatic compounds, after removal of the final nitrating acid, by treatment with a washing medium, and also to a plant or apparatus suitable for implementing this method. Further provided by the invention is a production plant for the nitration of nitratable aromatic compounds with subsequent purification of the nitrated products.
A process for scrubbing a crude mixture which is obtained in the nitration of toluene after separating off the nitrating acid and comprises dinitrotoluene, nitric acid, nitrogen oxides and sulfuric acid, which comprises two scrubbing steps (WS-I) and (WS II), wherein i) in a first scrubbing step (WS-I), the crude mixture is extracted with a scrubbing acid I comprising nitric acid, nitrogen oxides and sulfuric acid in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (WS-I-1) of the first scrubbing step (WS-I) has a total acid content of from 10 to 40% by weight and a content of from 80 to 350 ppm of hydrocyanic acid, giving a prescrubbed crude mixture, ii) in a second scrubbing step (WS-II), the prescrubbed crude mixture comprising dinitrotoluene is extracted with a scrubbing acid II in a scrub comprising at least one, preferably at least 2, extraction stage(s), where the scrubbing acid discharged from the first extraction stage (WS-II-1) of the second scrubbing step (WS-II) has a pH of less than or equal to 4, giving a dinitrotoluene-comprising mixture which is essentially free of nitric acid, sulfuric acid, nitrogen oxides and hydrocyanic acid and has a content of not more than 300 ppm of nitric acid and nitrogen oxides, not more than 3 ppm of sulfate and not more than 50 ppm of hydrocyanic acid.
The invention relates to a method and to a device for removing contaminants arising during the production of aliphatic or alicyclic nitric acid esters, in particular for removing contaminants from nitrated crude nitric acid esters, which nitrated crude nitric acid esters arise during the nitration of monovalent or multivalent aliphatic or alicyclic alcohols capable of nitration, after the separation of the final nitrating acid, and to a production system for nitrating monovalent or multivalent aliphatic alcohols capable of nitration with subsequent purification of the nitrated nitric acid esters.
The present invention relates to a method for removing impurities from nitrated crude products obtained during the nitration of nitratable aromatic compounds, after removal of the final nitrating acid, by treatment with a washing medium, and also to a plant or apparatus suitable for implementing this method. Further provided by the invention is a production plant for the nitration of nitratable aromatic compounds with subsequent purification of the nitrated products.
ii) in a second scrubbing step (SS-II), the prescrubbed crude mixture comprising dinitrotoluene is extracted with a scrubbing acid II in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (SS-II-1) of the second scrubbing step (SS-II) has a pH of less than or equal to 4 and a mixture comprising dinitrotoluene which is essentially free of nitric acid, sulfuric acid and nitrogen oxides is obtained.
The invention relates to a method for washing a raw mixture that is produced during the nitration of toluene following separation of the nitrating acid, and that contains dinitrotoluene, nitric acid, nitrogen oxides and sulphuric acid. Said method comprises two washing steps (WS-1iI) and (WS-II) in which i) in a first washing step (WS-1i), the raw mixture is extracted in a wash comprising at least one extraction stage, using a wash acid I that contains nitric acid, nitrogen oxides and sulphuric acid, the wash acid discharged from the first extraction stage (WS-1-1) of the first washing step (WS-1) having a total acid content of 20 to 40 wt.%, and a prewashed raw mixture being obtained, and ii) in a second washing step (WS-II), the prewashed raw mixture containing dinitrotoluene is extracted in a wash comprising at least one extraction stage, using a wash acid II, the wash acid discharged from the first extraction stage (WS-II-1) of the second washing step (WS-II) having a pH value of less than or equal to 4, and a mixture that contains dinitrotoluene and is substantially devoid of nitric acid, sulphuric acid and nitrogen oxides being obtained.
The present invention relates to a method for removing impurities from nitrated crude products obtained during the nitration of nitratable aromatic compounds, after removal of the final nitrating acid, by treatment with a washing medium, and also to a plant or apparatus suitable for implementing this method. Further provided by the invention is a production plant for the nitration of nitratable aromatic compounds, with subsequent purification of the nitrated products.
The present invention relates to a method for removing impurities from nitrated crude products obtained during the nitration of nitratable aromatic compounds, after removal of the final nitrating acid, by treatment with a washing medium, and also to a plant or apparatus suitable for implementing this method. Further provided by the invention is a production plant for the nitration of nitratable aromatic compounds, with subsequent purification of the nitrated products.
The invention relates to a process for removing and recovering nitrating acid mixtures, in particular nitric acid, sulphuric acid and oxides of nitrogen, from the nitrated crude products occurring in the nitration of nitratable aromatic compounds after the nitrating acid has been separated off, by acidic scrubbing by means of a multistage extraction process, the extraction process comprising a cross-current extraction with downstream countercurrent extraction. The process permits essentially complete recovery of the abovementioned acids, including the oxides of nitrogen, in high concentrations, so that they can be recycled to the nitration and no longer pollute the wastewater.
