Patent application number | Description | Published |
20080236390 | Absorbtion Medium and Method for Removing Carbon Dioxide From Gas Streams - A description is given of an absorption medium for removing carbon dioxide from gas streams which comprises aqueous solution of an amine of the formula I | 10-02-2008 |
20090199711 | REMOVAL OF CARBON DIOXIDE FROM FLUE GASES - A description is given of a process for removing carbon dioxide from gas streams in which the partial pressure of the carbon dioxide is less than 200 mbar, in particular flue gases, the gas stream being contacted with a liquid absorption medium which comprises an aqueous solution (A) of a tertiary aliphatic alkanolamine and (B) an activator of the formula | 08-13-2009 |
20090199713 | CARBON DIOXIDE ABSORBENT REQUIRING LESS REGENERATION ENERGY - A description is given of an absorption medium for removing carbon dioxide from a gas stream, which comprises an aqueous solution of at least one amine and at least one aminocarboxylic acid and/or aminosulfonic acid. The concomitant use of an aminocarboxylic acid or aminosulfonic acid reduces the energy required for regeneration of the absorption medium. | 08-13-2009 |
20090211447 | PROCESS FOR THE RECOVERY OF CARBON DIOXIDE - A process for the recovery of carbon dioxide, which includes: (a) an absorption step of bringing a carbon dioxide-containing gaseous feed stream into gas-liquid contact with an absorbing fluid, whereby at least a portion of the carbon dioxide present in the gaseous stream is absorbed into the absorbing fluid to produce (i) a refined gaseous stream having a reduced carbon dioxide content and (ii) an carbon dioxide-rich absorbing fluid; and (b) a regeneration step of treating the carbon dioxide-rich absorbing fluid at a pressure of greater than 3 bar (absolute pressure) so as to liberate carbon dioxide and regenerate a carbon dioxide-lean absorbing fluid which is recycled for use in the absorption step, in which the absorbing fluid is an aqueous amine solution containing a tertiary aliphatic alkanol amine and an effective amount of a carbon dioxide absorption promoter, the tertiary aliphatic alkanol amine showing little decomposition under specified conditions of temperature and pressure under co-existence with carbon dioxide. | 08-27-2009 |
20090320682 | REMOVAL OF CARBON DIOXIDE FROM COMBUSTION EXHAUST GASES - The invention relates to an absorbent, comprising an aqueous solution (A) of at least one amino acid salt of the formula (I), wherein R | 12-31-2009 |
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 |
20100192770 | CYCLIC-AMINE-COMPRISING ABSORPTION MEDIUM FOR REMOVING ACID GASES - An absorption medium for removing acid gases from a fluid stream comprises an aqueous solution of A) at least one cyclic amine compound having solely tertiary amine groups and/or sterically hindered secondary amine groups and B) at least one cyclic amine compound having at least one sterically unhindered secondary amine group. The absorption medium comprises, e.g., an aqueous solution of A) 1-hydroxyethylpiperidine and/or triethylenediamine and B) piperazine. The absorption medium is particularly suitable for separating off carbon dioxide from flue gases and satisfies the following criteria: (i) sufficient capacity at low CO | 08-05-2010 |
20100236408 | METHOD FOR REMOVING CARBON DIOXIDE FROM FLUID FLOWS, IN PARTICULAR COMBUSTION EXHAUST GASES - A process for removing carbon dioxide from a fluid flow, wherein a) the fluid flow is brought into contact with an absorption agent which contains a solution of ammonia and at least one amino carboxylic acid and/or amino sulfonic acid, a charged absorption agent being obtained, and b) the charged absorption agent is regenerated while releasing carbon dioxide. The additional use of the amino carboxylic acid and/or amino sulfonic acid increases the circulation absorption capacity of the absorption agent. | 09-23-2010 |
20110094381 | ABSORPTION MEDIUM AND METHOD FOR REMOVING SOUR GASES FROM FLUID STREAMS, IN PARTICULAR FROM FLUE GASES - Absorption medium for acid gases comprising an oligoamine (A) of the general formula (I) | 04-28-2011 |
20110135549 | ABSORPTION MEDIUM AND METHOD FOR REMOVING SOUR GASES FROM FLUID STREAMS, IN PARTICULAR FROM FLUE GASES - Absorption medium for acid gases comprising an oligoamine (A) of the general formula (I) | 06-09-2011 |
20120230896 | REMOVAL OF CARBON DIOXIDE FROM COMBUSION EXHAUST GASES - The invention relates to an absorbent, comprising an aqueous solution (A) of at least one amino acid salt of the formula (I), wherein R | 09-13-2012 |
20130175471 | Removal of Acid Gases from a Fluid Flow by Means of Reduced Coabsorption of Hydrocarbons and Oxygen - A process for removing acid gases from a hydrocarbonaceous fluid stream or an oxygen-comprising fluid stream in which the fluid stream is contacted with an aqueous solution which is essentially free from inorganic basic salts and comprises (i) at least one amine and (ii) at least one metal salt of an aminocarboxylic acid and/or an aminosulfonic acid. Conjoint use of the aminocarboxylic and/or aminosulfonic salt reduces the coabsorption of hydrocarbons or oxygen without significantly impairing the absorption rate at which acid gases are absorbed, without significantly reducing the absorption capacity of the solution for acid gases, and without significantly increasing the energy demand required for regeneration. | 07-11-2013 |
20140079613 | CYCLIC-AMINE-COMPRISNG ABSORPTION MEDIUM FOR REMOVING ACID GASES - An absorption medium for removing acid gases from a fluid stream comprises an aqueous solution of A) at least one cyclic amine compound having solely tertiary amine groups and/or sterically hindered secondary amine groups and B) at least one cyclic amine compound having at least one sterically unhindered secondary amine group. The absorption medium comprises, e.g., an aqueous solution of A) 1-hydroxyethylpiperidine and/or triethylenediamine and B) piperazine. The absorption medium is particularly suitable for separating off carbon dioxide from flue gases and satisfies the following criteria: (i) sufficient capacity at low CO | 03-20-2014 |