Abstract

The present invention relates to a process for treating non-sulfidic ores with a collector composition containing a primary and a secondary collector,wherein the primary collector is selected from the group of amphoteric and anionic surface active compounds and the secondary collector is an ethoxylated fatty acid wherein the average degree of ethoxylation is higher than 0 and less than 2, to collector compositions suitable for use in the above process,and to pulp comprising such collector compositions.

IPC Classes  ?

• B03D 1/008 - Organic compounds containing oxygen
• B03D 1/01 - Organic compounds containing nitrogen
• B03D 1/012 - Organic compounds containing sulfur

Abstract

The present invention relates to a collector composition containing 80 to 100 wt% of at least one alkylethermonoamine, less than 20 wt% alkyletherdiamine, all wt% based on total weight of all amine components, and wherein the alkylethermonoamine contains between 60 and 93% isotridecyl(C13)etherpropylamine, 5 and 30% of isododecyl(C12)etherpropylamine, 0 and 10% of isoundecyl(C11)- etherpropylamine, 0 and 10% of isodecyl(C10)etherpropylamine, 2 and 10% tetradecyl(C14) etherpropylamine, all % being based on total weight of alkylethermonoamine and the use thereof in a process to treat iron ore.

IPC Classes  ?

• B03D 1/004 - Organic compounds
• B03D 1/01 - Organic compounds containing nitrogen
• B03D 1/02 - Froth-flotation processes
• C22B 3/00 - Extraction of metal compounds from ores or concentrates by wet processes

Abstract

The present invention relates to secondary collector mixtures containing at least one compound (i) selected from the group of branched fatty alcohols with 12-16 carbon atoms having a degree of branching (DB) of 1-3.5 and their alkoxylates with a degree of ethoxylation (DE) of up to 4, and at least one compound (ii) selected from the group of alkoxylates of nonionic hydrocarbon compounds with a degree of ethoxylation of higher than 3 and carbohydrate-based surfactants, wherein if both compounds (i) and (ii) are ethoxylated alcohols, the mixture has a bimodal degree of ethoxylation distribution; to the use of compound (ii) as an emulsifier for compound (i) in a liquid; to collector compositions containing the secondary collector mixtures together with a primary collector that is an amphoteric or anionic surface-active compound; and to the use of the above compositions in a process for froth flotation of non-sulfidic ores.

IPC Classes  ?

• B03D 1/004 - Organic compounds
• B03D 1/008 - Organic compounds containing oxygen
• B03D 1/01 - Organic compounds containing nitrogen
• B03D 1/012 - Organic compounds containing sulfur

Abstract

An electrode (10) is disclosed in which a first layer (30) of TiOx with a porosity in the range 0 -3% is present on at least one surface of an electrode substrate (20), a second layer (40) of TiOx with a porosity of greater than 3 and up to 20% is present on the first layer (30) of TiOx. An electro-catalytic layer (50) is present on the second layer (40) of TiOx. x is in the range 1 -2 for the first (30) and second layer (40) of TiOx. A process for the manufacture of the electrode (10) is disclosed as are uses thereof.

IPC Classes  ?

• C25B 1/26 - ChlorineCompounds thereof
• C25B 11/053 - Electrodes comprising one or more electrocatalytic coatings on a substrate characterised by multilayer electrocatalytic coatings

Abstract

The present invention relates to the use of a specific group of acylated nitrogen-containing compounds as anti-agglomerants for gas hydrates. The anti-agglomerants are surface active nitrogen-containing compounds with 1-7 nitrogen atoms, which compounds have at least two hydrophobic groups with 6-24 carbon atoms, and where the hydrophobic groups are connected to the remainder of the molecule by an amine moiety or an amide moiety, and which compounds have at least one C2-C5 acyl group; or a salt thereof. The invention also relates to a method for inhibiting the agglomeration of gas hydrates in a conduit, and compositions comprising the gas hydrate anti-agglomerant, a corrosion inhibitor and/or a paraffin deposition inhibitor.

IPC Classes  ?

• C10L 3/10 - Working-up natural gas or synthetic natural gas
• F17D 1/02 - Pipe-line systems for gases or vapours

Abstract

An apparatus and a method for expanding a slurry of thermally expandable thermoplastic microsphere is disclosed. The apparatus and method expand the slurry of thermally expandable thermoplastic microsphere without any direct contact to a fluid heat transfer medium. The apparatus and method utilise a distribution pipe attached to an outlet pipe.

IPC Classes  ?

• C04B 38/08 - Porous mortars, concrete, artificial stone or ceramic warePreparation thereof by adding porous substances
• C08J 9/22 - After-treatment of expandable particlesForming foamed products

Abstract

The present invention relates to the use of branched fatty alcohol-based compounds selected from the group of fatty alcohols with 12-16 carbon atoms having a degree of branching of 1-3, and their alkoxylates with a degree of ethoxylation of up to 3, as secondary collectors for the froth flotation of non-sulfidic ores, incombination with a primary collector selected from the group of amphoteric and anionic surface active compounds.

IPC Classes  ?

• B03D 1/00 - Flotation

Abstract

The present invention relates to a compound obtainable by the condensation of a polyol having 3-4 hydroxyl groups, adicarboxylic acid or a derivative thereof, an alkanolamine anda fatty acid, followed by reaction with an alkylating agent. This compound is useful as a collector in a process for the reverse froth flotation of non-sulfidic ores containing silicate as impurities, especially phosphate ores.

IPC Classes  ?

• C07C 219/06 - Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton having esterified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having the hydroxy groups esterified by carboxylic acids having the esterifying carboxyl groups bound to hydrogen atoms or to acyclic carbon atoms of an acyclic saturated carbon skeleton
• C07D 219/06 - Oxygen atoms
• C11D 1/62 - Quaternary ammonium compounds

Abstract

The present invention relates to a silica sol having a pH above about 10, molar ratio of Si02:M20, in which M is alkali metal, of from about 6:1 to about 16:1, concentration of soluble silica above about 3000 mg Si02/l, and S-value of from about 18 to about 40 %. The invention further relates to a process for producing a silica sol which comprises acidifying an aqueous alkali metal silicate solution to a pH of from 1 to 4 to form an acid sol, alkalizing the acid sol by addition of aqueous alkali metal silicate solution to obtain an intermediate sol and interrupt the addition of aqueous alkali metal silicate solution when the intermediate sol has reached a pH of from about 5 to about 8, stirring the intermediate sol for a time period of from about 10 to about 6000 seconds without addition of aqueous alkali metal silicate solution, alkalizing the intermediate sol by addition of aqueous alkali metal silicate solution to obtain a silica sol having a pH above about 10 and molar ratio of Si02:M20, in which M is alkali metal, of from about 6:1 to about 16:1, and optionally adding an aluminum compound to the acid sol, intermediate sol or silica sol. The invention further relates to a silica sol obtainable by the process of the invention. The invention further relates to the use of the silica sol as a flocculating agent, in water purification and in producing paper and board. The invention further relates to a process for producing paper and board which comprises: (i) providing an aqueous suspension comprising cellulosic fibers; (ii) adding to the suspension one or more drainage and retention aids comprising the silica sol; and (iii) dewatering the obtained suspension to provide a sheet or web of paper or board.

IPC Classes  ?

• C01B 33/141 - Preparation of hydrosols or aqueous dispersions
• C01B 33/145 - Preparation of hydroorganosols, organosols or dispersions in an organic medium
• D21H 17/37 - Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
• D21H 17/68 - Water-insoluble compounds, e.g. fillers or pigments siliceous, e.g. clays
• D21H 21/10 - Retention agents or drainage improvers

Abstract

The invention relates to a process for the production of chlorine dioxide comprising forming chlorine dioxide in a reaction medium in a reaction vessel and withdrawing chlorine dioxide as a gas from the reaction medium in the reaction vessel, the process further comprising adding chlorine dioxide to at least one raw material used in the process. The invention further relates to the use of chlorine dioxide for the reduction of the amount of chlorinated aromatic compounds occurring in a process for the production of chlorine dioxide.

IPC Classes  ?

• C01B 11/02 - Oxides of chlorine

Abstract

The invention relates to particular orthoester based polymers as well as the use of specific orthoester based polymers as a demulsifier for water/oil emulsions. Products suitable for use according to the invention have the formula (I), wherein R1 is hydrogen or a hydrocarbyl group with 1 -4 carbon atoms, R2, R3, and R4 are, independently, a group comprising C3-C4 alkyleneoxy groups and/or ethyleneoxy groups in any order, and an end group Y, which is, independently, hydrogen, a hydrocarbyl group with 1-30 carbon atoms, a group -(CH2)zNR5R6 or -(CH2)ZN+R5R6R7, wherein each of R5, R6, and R7 is, independently, an alkyl group with 1-22 carbon atoms or -CH2CH2OH, and z is 2 or 3, provided that at least one of the groups R2, R3, and R4 comprises at least one block of at least on average 4 alkyleneoxy groups with 3 and/or 4 carbon atoms, and provided that if Y is hydrogen, then at least one of n and m is a number of 1-100, or a di- or polycondensate of the polymer via free hydroxyl groups in R2, R3 or R4.

IPC Classes  ?

• C07C 43/32 - Compounds having groups or groups
• C08G 65/331 - Polymers modified by chemical after-treatment with organic compounds containing oxygen
• C10G 33/04 - De-watering or demulsification of hydrocarbon oils with chemical means

Abstract

The invention relates to a process for the continuous production of chlorine dioxide under non-crystallising conditions in at least two reaction vessels comprising the steps of feeding to a first reaction vessel alkali metal chlorate, a mineral acid and hydrogen peroxide to form an acidic reaction medium maintained in said first reaction vessel, reacting alkali metal chlorate, hydrogen peroxide and mineral acid in said reaction medium to form chlorine dioxide and alkali metal salt of the mineral acid, withdrawing chlorine dioxide from said reaction medium in said first reaction vessel as a gas, withdrawing depleted reaction medium comprising mineral acid, alkali metal chlorate and alkali metal salt of the mineral acid from said first reaction vessel and feeding it to a second reaction vessel, feeding hydrogen peroxide to the reaction medium in said second reaction vessel and maintaining said reaction medium therein at a concentration of alkali metal chlorate from about 9 to about 75 mmoles/litre, reacting alkali metal chlorate, hydrogen peroxide and mineral acid in said reaction medium to form chlorine dioxide and alkali metal salt of the mineral acid, withdrawing chlorine dioxide from said reaction medium in said second reaction vessel as a gas, and withdrawing depleted reaction medium comprising mineral acid and alkali metal salt of the mineral acid from said second reaction vessel.

IPC Classes  ?

• C01B 11/02 - Oxides of chlorine

Abstract

The present invention relates to an aqueous quick-setting bitumen-aggregate mix suitable for cold pavement of roads, parking places, sidewalks and thelike. The bitumen-aggregate mix is manufactured by mixing a mineral aggregate, water, a de-emulsifier, containing hydraulic cement, and a cationic oil-in--water bitumen emulsion, containing, as an emulsifier, a salt of a tertiary diamine and a phosphoric acid. The diamine has the formula (I): (see formula I)where one or two of the groups R1, R2, R4 and R5 designate a hydrocarbon group of 6--22, preferably 8-20 carbon atoms, and the remaining R1, R2, R4 and R5 groups are an alkyl group with 1-4 carbon atoms, and/or a group -(A)s H, where A is an alkyleneoxy group with 2-3 carbon atoms, and s is a number from 1-4, and R3 is an alkylene group with 2-4 carbon atoms.

IPC Classes  ?

• C08K 5/17 - AminesQuaternary ammonium compounds
• C08K 5/52 - Phosphorus bound to oxygen bound to oxygen only
• C08L 95/00 - Compositions of bituminous materials, e.g. asphalt, tar or pitch