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| Number | Title | Issue Date |
| 7749475 | Method for separation and recycle of pure sulfur dioxide from a gaseous mixture in is cycle with ionic liquids The present invention relates to a method for separation and recycling of pure sulfur dioxide from a gaseous mixture in the IS cycle. More specifically, the present invention relates to a method for separation and recycling of pure sulfur dioxide from a gaseous mixt... | 07/06/2010 |
| 7438877 | Fast, high capacity hydrogen sulfide scavengers Selective, irreversible removal of hydrogen sulfide (H2S) and other sulfhydryl compounds from a gas stream, such as sour natural gas and sour hydrocarbon liquids is achieved with a scavenging agent having hydroxyalkyl functionality and alkylamine function... | 10/21/2008 |
| 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 |
| 7419646 | Method of deacidizing a gas with a fractional regeneration absorbent solution The gaseous effluent flowing in through line 1 is contacted in absorption zone ZA with the liquid absorbent solution flowing in through line 9. The gaseous effluent depleted in acid compounds is discharged through line 2. The absorbent solution ... | 09/02/2008 |
| 7387768 | Method for purifying gases The invention relates to the use of an absorption liquid for purifying gases from gaseous acidic contaminants, the absorption liquid comprising A) 0.1 to 100% by weight of one or more amines of the formula I ... | 06/17/2008 |
| 7384616 | Waste gas treatment process including removal of mercury A process for removing contaminants from a waste gas stream comprises treating the waste gas stream to remove at least one of SO2 and NOx and to obtain a lean stream having a reduced level of at least one of SO2 and NOx an... | 06/10/2008 |
| 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 |
| 7332145 | Process and installation for the treatment of DSO Disclosed is a process for the treatment of gas containing mercaptans and acid gases, including the following steps: (1) separating the acid gases from the said gas and obtaining a sweetened gas and the flow of acid gases containing H2S; (2) reacting the ... | 02/19/2008 |
| 7214358 | Low energy regenerable SOscrubbing process Sulphur dioxide is removed from gas streams by contacting the gas stream with an absorbing medium containing an amine capable of forming an amine salt, heat stable salt and sulfite. The level of heat stable salt is selected such that during the regeneration process ... | 05/08/2007 |
| 7056482 | Method for recovery of CO2 from gas streams A process for recovering CO2 from a feed gas stream comprises treating the feed gas stream with a regenerated absorbent comprising at least one tertiary amine absorbent having a pKa for the amino function of from about 6.5 to about 9 in the pre... | 06/06/2006 |
| 7037434 | Integrated water treatment and flue gas desulfurization process A water stream containing hardness minerals is subjected to a water treatment process using an alkali agent to precipitate the hardness minerals and to produce a softened water stream is used to create an integrated water treatment and flue gas desulfurization proce... | 05/02/2006 |
| 6852144 | Method for removing COS from a stream of hydrocarbon fluid and wash liquid for use in a method of this type COS is selectively removed with respect to CO2 from a hydrocarbonaceous fluid stream which contains CO2 and COS. Examples of the fluid stream include a gas stream, for example natural gas, synthesis gas from heavy oil or heavy residues or refin... | 02/08/2005 |
| 6770119 | Mercury removal method and system The present invention provides a mercury removal method which can effectively remove very small amounts of mercury components present in a gas during wet gas purification such as coal or heavy oil gasification gas purification and petroleum refining. A mercury remov... | 08/03/2004 |
| 6746623 | Alkyl glycidyl ether-capped diamine foam controlling agent The present invention pertains to a method for controlling the foaming of a waterborne composition or in an industrial process utilizing a waterborne composition by the incorporation of a foam controlling agent in an amount effective for controlling foam. The method... | 06/08/2004 |
| 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 |
| 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 |
| 6602324 | Sulfur control in ion-conducting membrane systems A method for controlling the sulfur dioxide partial pressure in a pressurized, heated, oxygen-containing gas mixture which is contacted with an ion-conducting metallic oxide membrane which permeates oxygen ions. The sulfur dioxide partial pressure in the ... | 08/05/2003 |
| 6595218 | Cigarette filter A cigarette filter having a reagent which chemically reacts with and removes a gaseous component of a smoke stream. The reagent contains functional groups covalently bonded to a non-volatile inorganic substrate which is incorporated in the filter. The fil... | 07/22/2003 |
| 6544492 | Regeneration method for process which removes hydrogen sulfide from gas streams A process is provided for the removal of hydrogen sulfide out of a gaseous stream (22), such as a natural gas, by contacting the hydrogen sulfide containing gas with a sorbing liquid (26) containing a tertiary amine so that the hydrogen sulfide is sorbed ... | 04/08/2003 |
| 6355094 | Material for the removal of gaseous impurities from a gas mixture Porous, preferably dimensionally stable material and a method for using for the removal of gaseous impurities from a gas mixture, such as H2 S, COS, CH2, and SO2, into the pores of which there is incorporated a secondary a... | 03/12/2002 |
| 6342169 | Safe storage and transportation of sulfur dioxide The invention relates to a method of confining sulfur dioxide for storage or transportation under safe conditions. The method of the invention comprises the steps of (a) contacting a sulfur dioxide-containing gas stream with an absorbing medium comprising... | 01/29/2002 |
| 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 |
| 6267939 | Absorbent composition for purifying gases which contain acidic components An absorbent composition for purifying gases which contain acidic components. The composition contains at least one compound of formula (I), wherein n is 2-6, p is 1-3, the R1 groups may be the same or different and represent hydrogen or C... | 07/31/2001 |
| 6221277 | Composition for removing sulfur compounds from fluids The present invention relates to an activated metal oxide and methods for removing sulfur compounds from fluids, whereby the activated metal oxide includes an amount of metal oxide and an amount of ethoxylated fatty amine, with the ethoxylated fatty amine... | 04/24/2001 |
| 6209547 | Cigarette filter A cigarette filter having a reagent which chemically reacts with and removes a gaseous component of a smoke stream. The reagent contains functional groups covalently bonded to a non-volatile inorganic substrate which is incorporated in the filter. The fil... | 04/03/2001 |
| 6096280 | Natural gas treatment process Hydrogen sulfide is removed from gas streams by reaction with sulfur dioxide in an autogeneously-formed aqueous acid medium according to the equation: SO2 +2H2 S.fwdarw.2H2 O+3S the sulfur being removed from the aqueous ph... | 08/01/2000 |
| 5980733 | Method of removing sulfur compounds from hydrocarbon streams A method of removing hazardous sulfur compounds, such as hydrogen sulfide, mercaptans and sulfur oxides, from a fluid stream comprising contacting the fluid stream with an aqueous composition comprised of a tertiary amine oxide. The amine oxide reacts wit... | 11/09/1999 |
| 5879433 | Method and apparatus for reducing the acid gas and/or inert particulate content of steam One or more contaminants selected from the group consisting of acidic gases, inert particulates, and mixtures thereof are removed from steam by contacting the contaminated steam with a nonaqueous sorbent such as crystalline molecular sieves, silica gels, ... | 03/09/1999 |
| 5705090 | Absorption of mercaptans Absorption solvents for removing mercaptans from gas streams are disclosed. The absorption solvents comprise an alkylether of a polyalkylene glycol, e.g., methoxytriglycol, and a secondary monoalkanolamine, e.g., N-methylethanolamine, as well as optionall... | 01/06/1998 |
| 5700438 | Process for removal of H2S from gas processing streams A process for removing H2S and mercaptans from gas streams. The process comprises contacting such gas streams with an aqueous solution of copper complex of a water soluble amine to form water insoluble copper sulfide and regenerate free water soluble amin... | 12/23/1997 |
| 5693297 | Gas treatment method A system and method for injecting a gaseous contaminant absorbent through at least one spray nozzle into a pipe transporting gas to a contacting vessel wherein the gas is contacted with a liquid absorbent to remove at least one gaseous contaminant from th... | 12/02/1997 |
| 5688478 | Method for scavenging sulfides A method is provides for reducing the levels of hydrogen sulfide and organic sulfides present in gaseous hydrocarbon streams by contacting the streams with a composition comprising the reaction product of an alkanolamine with a C1 to C4 dialdehyde, especi... | 11/18/1997 |
| 5625117 | Fuel gas stripping of rich amine to remove hydrocarbons Minor amounts of C3 -C4 hydrocarbons from amine absorbents used in removing H2 S liquid C3 -C4 hydrocarbon are recovered. The process features recovery of the C3 -C4 hydrocarbon in a ... | 04/29/1997 |
| 5622681 | Dialysis separation of heat stable organic amine salts in an acid gas absorption process There is disclosed an organic amine scrubbing process for acid gas abatement of gas streams. The process comprises Donnan dialysis of an absorbent solution to separate and convert organic amine heat stable salts back to free amine absorbent using an anion... | 04/22/1997 |
| 5607594 | Process for purifying an aqueous methyldiethanolamine solution In the process for purifying an aqueous MDEA-solution the formate content of the MDEA-solution circulated in a main stream between the absorber and desorber of a hydrogen sulfide wash unit for gas produced by gasification of a carbonaceous material, e.g. ... | 03/04/1997 |
| 5607011 | Reverse heat exchanging system for boiler flue gas condensing and combustion air preheating A condensing heat exchanger for removing acidic vapors and recovering residual waste heat energy normally rejected into the atmosphere from a fossil fueled boiler flue gas stream, wherein the waste heat energy in the boiler flue gas is recovered by multip... | 03/04/1997 |
| 5589149 | Process for absorption of mercaptans Absorption solvents for removing mercaptans from gas streams are disclosed. The absorption solvents comprise an alkylether of a polyalkylene glycol, e.g., methoxytriglycol, and a secondary monoalkanolamine, e.g., N-methylethanolamine, as well as optionall... | 12/31/1996 |
| 5523069 | Carbonyl sulfide abatement in fluids A method for removing carbonyl sulfide from fluids, particularly gases, involves contacting them with alkaline aqueous solutions containing peroxide and hindered amine. The sulfur products so formed can then be separated from the fluid. In one embodiment,... | 06/04/1996 |
| 5466270 | Cyclonic centrifugal gas separator - absorber apparatus for boiler flue gas cleaning Sulfur dioxide in flue gas exhaust stream from fossil fueled boiler, is absorbed by a regenerative organic solvent in a centrifugal gas separator-absorber.... | 11/14/1995 |
