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| Number | Title | Issue Date |
| 8043588 | Method and plant for removing carbon dioxide from flue gas This invention relates to a method and plant for energy-efficient removal of CO2 from a gas phase by means of absorption. The invention is particularly suitable for use in connection with thermal power plants fired by fossil fuels, and is also well-suited... | 10/25/2011 |
| 7776296 | Regeneration of ion exchangers that are used for salt removal from acid gas capture plants A process for the removal of an amine capturable gas from a feed gas stream using an amine solvent, the process comprises (a) contacting the feed gas stream with a lean amine solvent to form a rich amine solvent, wherein heat stable salts are present in the rich ami... | 08/17/2010 |
| 7425314 | Process for removing sulphur compounds including hydrogen sulphide and mercaptans from gas streams A process for the removal of hydrogen sulfide and mercaptans from a gas stream containing a high ratio of mercaptans to hydrogen sulfide, wherein the first step removes hydrogen sulfide by washing the gas stream with an aqueous washing solution comprising water, a p... | 09/16/2008 |
| 7384617 | Process and equipment for treating refinary gases containing hydrogen sulphide A process for the abatement of hydrogen sulphide in refinery gases by means of a liquid-ring compressor (10) uses, as service liquid, an aqueous solution of amines already available in the refinery itself. The process also comprises a stage of washing of the ... | 06/10/2008 |
| 7377967 | Split flow process and apparatus An acid gas removal plant includes an absorber that provides a rich solvent to two regenerators that independently generate a lean and a semi-lean solvent, wherein the semi-lean solvent is produced in one of the regenerators using heat and/or steam derived from the ... | 05/27/2008 |
| 7374734 | Absorbing agent and method for eliminating acid gases from fluids The disclosure relates to an absorbent for removing acid gases from fluids. The absorbent contains at least one tertiary amine, an amine which is selected from hydroxyethylpiperazine, bis(hydroxyethylpiperazine) or a mixture of these and piperazine. The absorbent ma... | 05/20/2008 |
| 7276153 | Method for neutralising a stream of hydrocarbon fluid In a process for deacidifying a fluid hydrocarbon stream which comprises carbon dioxide (CO2) and/or other acid gases as impurities, the fluid stream is brought into intimate contact with an absorption liquid in an absorption or extraction zone (12... | 10/02/2007 |
| 7208640 | Process for isolating highly pure 2-methoxypropene A process for isolating purified 2-methoxypropene from a mixture which comprises 2,2-dimethoxypropane, 2-methoxypropene, methanol, acetone, and optionally other carbonyl group-containing compounds, which process involves subjecting the mixture to distillation, addin... | 04/24/2007 |
| 7189282 | Method for eliminating mercaptan from crude gas This invention relates to a process for cleaning gas, in particular hydrocarbonaceous gas such as e.g. natural gas, which is contaminated with sulfur in the form of H2S and mercaptans as well as CO2. To remove the undesired sulfur-contai... | 03/13/2007 |
| 7175821 | Reactor and process for reducing emissions of CO and NO The current invention provides systems and method for reducing emissions of gaseous pollutants such as carbon monoxide, nitric oxide and nitrogen dioxide. The invention utilizes at least one catalyst bed and at least one fluidizable bed of sorbent material. The curr... | 02/13/2007 |
| 7157070 | Method for purifying gas containing hydrocarbons A hydrocarbon gas containing H2S, mercaptans and CO2 is fed to an absorption plant operated at a pressure of 20 to 80 bar and supplied with a selective solvent, a solvent stream loaded with H2S and a roughly desulfurized gas stream a... | 01/02/2007 |
| 7140433 | Diamine terminated primary amine-aldehyde sulfur converting compositions and methods for making and using same A new class of sulfur scavenging or converting compositions is disclosed comprising diamine terminated, amine-aldehyde adducts, where the adducts are substantially bimolecular amine-aldehyde adducts and the composition is substantially free of trimer and/or triazine... | 11/28/2006 |
| 7083662 | Generation of elevated pressure gas mixtures by absorption and stripping Method of making a product gas mixture comprising providing a first gas mixture, contacting the first gas mixture with a lean absorber liquid at a first pressure and absorbing a portion of the first gas mixture in the lean absorber liquid to provide a rich absorber ... | 08/01/2006 |
| 7004997 | Method for removal of acid gases from a gas flow A process is described for removing acid gases from a gas stream in which an acid-gas-containing gas stream in which the sum of the partial pressures of the acid gases does not exceed 1,500 mbar is brought into contact with an aqueous absorbent in an absorption step... | 02/28/2006 |
| 6974542 | Method and apparatus for removing foaming contaminants from hydrocarbon processing solvents A column of solvent containing foaming contaminants is provided. Gas is educted into the solvent in the column so as to generate foam in the column. The gas is educted into the column independently of the input flow of solvent into the solvent using a pumparound arr... | 12/13/2005 |
| 6969418 | Phase enhanced gas-liquid absorption method A phase enhanced gas-liquid absorption method is disclosed. By adding an organic mixture or compound into a conventional gas-liquid system, the organic mixture forms a layer between the gas mixture and the liquid carrier. In this modified system, the absorption rate... | 11/29/2005 |
| 6939393 | Method for neutralizing a stream of fluid, and washing liquid for use in one such method A description is given of the use of an alkylenediamine of the type R1HN—X—NHR2, where X is an alkylene radical having from 2 to 9 carbons, R1 is a hydrocarbon radical having from 1 to 6 carbons and R2 is a hydrocarbon... | 09/06/2005 |
| 6884282 | Method and system for increasing the absorption selectivity of H2S from a gas containing CO2 and H2S A system and a method for increasing the selectivity of H2S absorption in an aqueous amine treating processes for streams containing high CO2:H2S ratio mixtures in an absorption column by maintaining the temperature in the absorption... | 04/26/2005 |
| 6784320 | Amine recovery method and apparatus and decarbonation apparatus having same In a decarbonation process for removing carbon dioxide from a carbon dioxide-containing gas with the use of an amine compound-containing absorbing solution, an amine compound accompanying a decarbonated exhaust gas is efficiently recovered in the following manner: A... | 08/31/2004 |
| 6740230 | Method for removing mercaptans from fluid fluxes The disclosure concerns a process for removing mercaptans from fluid streams comprising same, especially from hydrocarbon gas streams, for example natural gas, synthesis gas from heavy oil or heavy residues or refinery gas, or else from liquid hydrocarbons, for exam... | 05/25/2004 |
| 6692711 | Production of low sulfur syngas from natural gas with C4+/C5+ hydrocarbon recovery Sour natural gas is processed to remove the sulfur compounds and recover C4+ /C5+ hydrocarbons by scrubbing the gas with an amine solution to remove most of the sulfur, followed cooling the gas to remove C4+ /C5+ | 02/17/2004 |
| 6689332 | Process for removing carbon dioxide from combustion gases A process for removing CO2 from a combustion gas which comprises bringing a combustion gas containing oxygen and CO2 and a CO2 absorbent solution into contact at the atmospheric pressure, thereby allowing the CO2 | 02/10/2004 |
| 6666908 | Process for deacidizing a gas with washing of the hydrocarbons desorbed upon regeneration of the solvent Within the scope of a process using two absorption sections for treating a natural gas containing CO2 and/or H2 S, as well as mercaptans, COS and/or CS2, the present invention aims to wash the gaseous hydrocarbons desorbed... | 12/23/2003 |
| 6645446 | Split-flow process and apparatus A recovery plant for recovery of a gaseous component, such as carbon dioxide, from a process gas, such as the exhaust from a combustion turbine, has an absorber (110) employing a lean solvent (126) in an upper section of the absorber and a semi-lean solve... | 11/11/2003 |
| 6605138 | Apparatus and method for exclusively removing VOC from regeneratable solvent in a gas sweetening system A method for removing residual VOC components from a fluid stream used in the sweetening of sour gas at gas processing plants. In a retrofit configuration, the method includes interposing a supplemental VOC removal station after a primary VOC removal stat... | 08/12/2003 |
| 6602423 | Method and apparatus for removing foaming contaminants from hydrocarbon processing solvents A column of solvent containing foaming contaminants is provided. Gas is educted into the solvent in the column so as to generate foam in the column. The gas is educted into the column independently of the input flow of solvent into the solvent using a pum... | 08/05/2003 |
| 6579508 | Method for controlling absorbent at decarboxylation facility and system therefor A method for controlling absorbent at a decarboxylation facility with an absorption tower having an amine recovery section and a regeneration tower, including controlling a temperature controller for controlling a temperature of circulating water forwarde... | 06/17/2003 |
| 6500397 | Method for removing carbon dioxide from combustion exhaust gas There are disclosed a method for removing CO2 from a combustion exhaust gas which comprises the step of bringing the combustion exhaust gas under atmospheric pressure into contact with an aqueous solution of a hindered amine selected from the g... | 12/31/2002 |
| 6497852 | Carbon dioxide recovery at high pressure Carbon dioxide is recovered from a feed stream whose pressure is up to 30 psia by preferentially absorbing carbon dioxide from said feed stream into a liquid absorbent fluid, pressurizing and heating the resulting stream to a pressure sufficient to enable... | 12/24/2002 |
| 6423282 | Method for the regeneration of an acid gas absorbing fluid containing methydiethanolamine and a (lower alkyl) piperazine A method for the regeneration of an acid gas absorbing fluid which comprises bringing a gaseous mixture containing an acid gas such as, for example, gasified coal gas, synthesis gas, coke oven gas, petroleum gas, natural gas, and the like, into contact wi... | 07/23/2002 |
| 6416568 | Hydrogen recycle and acid gas removal using a membrane The present invention is a process to recover a high purity, high pressure hydrogen gas stream from synthesis gas. The synthesis gas is contacted with a membrane that separates the synthesis gas into a hydrogen-enriched permeate and a hydrogen-depleted no... | 07/09/2002 |
| 6337059 | Absorbent compositions for the removal of acid gases from gas streams An absorbent composition for the removal of acid gases, such as CO2, H2 S and COS, from gas streams is provided. The absorbent composition comprises an aqueous solution comprising: 1) greater than 1 mole piperazine per liter of aqueo... | 01/08/2002 |
| 6277345 | Process for the purification of gases The present invention relates to the use of an absorption liquid for purifying a gas by removal of gaseous, acidic impurities. The gas to be purified can be any gas, such as synthesis gas or natural gas, which contains gaseous, acidic impurities such as C... | 08/21/2001 |
| 6274108 | Recovery of carbon dioxide from combustion exhaust gas A process is provided for removing carbon dioxide out of combustion exhaust gas by scrubbing the exhaust gas with an aqueous solution of monoethanolamine in a scrubber, and regenerating the carbon dioxide-loaded aqueous solution of monoethanolamine in a r... | 08/14/2001 |
| 6270739 | Process for the removal of carbon dioxide from 3,4-epoxy-1-butene process recycle streams Disclosed is a process for the efficient removal of carbon dioxide from a gas recycle system generated in an epoxidation process wherein 1,3-butadiene is selectively oxidized to 3,4-epoxy-1-butene. Carbon dioxide at low partial pressure is absorbed into a... | 08/07/2001 |
| 6207121 | Composition and process for removal of acid gases Alkanolamines of the formula R--NHCH2 CH(OH)CH2 CH3 (I) or mixtures thereof wherein R is H, --CH2 CH(OH)CH2 CH3, an alkyl group having from 1 to 6 carbon atoms, an aryl group having from 6 to 1... | 03/27/2001 |
| 6168768 | Production of low sulfer syngas from natural gas with C4+/C5+ hydrocarbon recovery Sour natural gas is processed to remove the sulfur compounds and recover C4+ /C5+ hydrocarbons by scrubbing the gas with an amine solution to remove most of the sulfur, followed cooling the gas to remove C4+ /C5+ | 01/02/2001 |
| 6165433 | Carbon dioxide recovery with composite amine blends A method for recovering carbon dioxide by absorption of carbon dioxide from a gas stream into a composite recovery solvent comprising preferably a lesser concentration of one or more fast reaction rate amines and a greater concentration of one or more slo... | 12/26/2000 |
| 6165432 | Composition and process for removal of acid gases Aqueous compositions comprising a mixture of a tertiary alkanolamine and a primary alkanolamine of the formula R--CH(NH2)--CH2 --OH (I) or mixtures thereof wherein R is H, or an alkyl group having from 1 to 8 a... | 12/26/2000 |
| 6146603 | System for recovering carbon dioxide from a lean feed A system for recovering absorbate such as carbon dioxide using an alkanolamine absorbent fluid, wherein the loaded absorbent is heated in a two step heating procedure prior to the separation of the absorbate from the absorbent, and wherein the loaded abso... | 11/14/2000 |
