Patent application number | Description | Published |
20100186590 | ABSORPTION MEDIUM FOR REMOVING ACID GASES WHICH COMPRISES AMINO ACID AND ACID PROMOTER - An absorption medium for removing acid gases from a fluid stream comprises an aqueous solution of a) of at least one metal salt of an aminocarboxylic acid, and b) of at least one acid promoter, wherein the molar ratio of b) to a) is in the range from 0.0005 to 1.0. The acid promoter is selected from mineral acids, carboxylic acids, sulfonic acids, organic phosphonic acids and partial esters thereof. The absorption medium, compared with absorption media based on amino acid salts, has a reduced regeneration energy requirement without significantly reducing the absorption capacity of the solution for acid gases. In a process for removing acid gases from the fluid stream, the fluid stream is brought into contact with the absorption medium. | 07-29-2010 |
20100288125 | ABSORPTION MEDIUM FOR THE SELECTIVE REMOVAL OF HYDROGEN SULFIDE FROM FLUID STREAMS - An absorption medium for the removal of acid gases from a fluid stream comprises an aqueous solution a) of at least one amine and b) at least one phosphonic acid, wherein the molar ratio of b) to a) is in the range from 0.0005 to 1.0. The phosphonic acid is, e.g., 1-hydroxyethane-1,1-diphosphonic acid. The absorption medium exhibits a reduced regeneration energy requirement compared with absorption media based on amines or amine/promoter combinations, without significantly decreasing the absorption capacity of the solution for acid gases. | 11-18-2010 |
20110033354 | ABSORPTION MEDIUM FOR REMOVING ACID GASES FROM A FLUID STREAM - An absorption medium for removing acid gases from a fluid stream comprises an aqueous solution (A) of an alkali metal salt of an N,N-di-C | 02-10-2011 |
20110288337 | PROCESS FOR PREPARING 2-(2-TERT-BUTYLAMINOETHOXY)ETHANOL (TERT-BUTYLAMINODIGLYCOL, TBADG) - A process for preparing 2-(2-tert-butylaminoethoxy)ethanol (tert-butylaminodiglycol, TBADG) by reacting diethylene glycol (DG) with tert-butylamine (TBA) in the presence of hydrogen and of a copper catalyst, by effecting the reaction at a temperature in the range from 160 to 220° C. in the presence of a copper- and aluminum oxide-containing catalyst, where the catalytically active material of the catalyst, before the reduction thereof with hydrogen, comprises
| 11-24-2011 |
20120067059 | PROCESS FOR RECOVERY OF CARBON DIOXIDE FROM A FLUID STREAM, IN PARTICULAR FROM SYNGAS - A process for removing carbon dioxide from a fluid comprises the steps of: (a) treating the fluid by bringing it into countercurrent contact with a liquid absorbent in a first absorption zone and thereafter in a second absorption zone to absorb at least part of the carbon dioxide contained in the fluid into the absorbent; (b) depressurizing the loaded absorbent to release a first stream of carbon dioxide and yield a partially regenerated absorbent; (c) recycling a first stream of the partially regenerated absorbent into the first absorption zone; (d) heating a second stream of the partially regenerated absorbent to release a second stream of carbon dioxide and yield a regenerated absorbent; (e) recycling the regenerated absorbent into the second absorption zone; (f) condensing water vapour entrained in the second stream of carbon dioxide by cooling the second stream of carbon dioxide and transferring at least part of the heat recovered to the partially regenerated absorbent by indirect heat exchange. The invention provides a two-stage carbon dioxide recovery process wherein the overall energy required for carbon dioxide recovery is reduced and/or wherein at least part of the carbon dioxide is recovered at a pressure higher than atmospheric pressure so as to reduce the energy required for compression of the carbon dioxide, e.g., for sequestration. Also disclosed is a plant for removing carbon dioxide from a fluid. | 03-22-2012 |
20120070353 | Process For Separating Off Acidic Gases By Means Of Metal-Organic Frameworks Impregnated With Amines - The present invention relates to a process for separating off at least one acidic gas from a gas mixture comprising at least one acidic gas, which comprises the step of contacting of the gas mixture with a porous metal-organic framework, where the framework adsorbs the at least one acidic gas and the framework comprises at least one at least bidentate organic compound coordinated to at least one metal ion, wherein the porous metal-organic framework is impregnated with an amine suitable for a gas scrub. The invention further provides such impregnated metal-organic frameworks. | 03-22-2012 |
20130230440 | REMOVING ACID GASES FROM WATER VAPOUR-CONTAINING FLUID STREAMS - A process for removing acid gases from a water vapour-containing fluid stream comprises a) providing an absorption liquid which is incompletely miscible with water; b) treating the fluid stream in an absorption zone with the absorption liquid to obtain an acid gas-depleted treated fluid stream and an acid gas-loaded absorption liquid; c) directing the treated fluid stream to a rehydration zone and treating the fluid stream with an aqueous liquid to volatilize at least part of the aqueous liquid; d) regenerating the loaded absorption liquid to expel the acid gases at least in part and obtain a regenerated absorption liquid, and directing the regenerated absorption liquid to step b); and e) separating, from the absorption liquid, an aqueous liquid that has condensed in the absorption zone, and directing the aqueous liquid to step c). The process allows for an efficient removal of water accumulated in the absorption liquid system. | 09-05-2013 |
20130259789 | REMOVING SULPHUR OXIDES FROM A FLUID STREAM - A process for removing sulphur oxides from a fluid stream, such as flue gas, that comprises a) providing a non-aqueous absorption liquid containing at least one hydrophobic amine, the non-aqueous absorption liquid being incompletely miscible with water: b) treating the fluid stream in an absorption zone with the non-aqueous absorption liquid to transfer at least part of the sulphur oxides into the non-aqueous absorption liquid and to form a sulphur oxide-hydrophobic amine-complex: c) causing the non-aqueous absorption liquid to be in liquid-liquid contact with an aqueous liquid whereby at least part of the sulphur oxide-hydrophobic amine-complex is hydrolyzed to release the hydrophobic amine and sulphurous hydrolysis products, and at least part of the sulphurous hydrolysis products is transferred into the aqueous liquid; d) separating the aqueous liquid from the non-aqueous absorption liquid. The process mitigates absorbent degradation problems caused by sulphur dioxide and oxygen in flue gas. | 10-03-2013 |
20140065040 | PROCESS FOR SEPARATING OFF ACID GASES FROM A WATER-COMPRISING FLUID STREAM - A process for separating off acid gases from a water-comprising fluid stream wherein the water-comprising fluid stream is contacted in an absorption zone with an absorbent, producing a deacidified fluid stream and an acid gas-loaded absorbent; the deacidified fluid stream is contacted in a scrubbing zone with an aqueous scrubbing liquid, producing a deaminated, deacidified fluid stream and an amine-loaded scrubbing liquid which is cooled, producing an absorber top condensate; the loaded absorbent is passed into a desorption zone producing a regenerated absorbent and desorbed acid gases; the regenerated absorbent is returned to the absorption zone in order to form an absorbent circuit, to which the amine-loaded scrubbing liquid and the absorber top condensate are introduced; and the desorbed acid gases are conducted through an enrichment zone and the acid gases exiting at the top of the enrichment zone are cooled, producing a desorber top condensate. | 03-06-2014 |