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| Number | Title | Issue Date |
| 8147593 | Absorbing solution, method and device for absorbing COor HS or both An absorbing solution according to the present invention is an absorbing solution that absorbs CO2 or H2S in gas or both of CO2 and H2S. The absorbing solution is formed by adding desirably 1 to 20 weight percent of tertia... | 04/03/2012 |
| 7993433 | Method and apparatus for energy reduction in acid gas capture The invention relates to a new method for removing and recovering of acid gases from a gaseous mixture in an absorption plant by adding an organic acid to a stream of the rich absorbent in the desorber in order to release acid gas by shifting the acid gas equilibriu... | 08/09/2011 |
| 7988767 | Hydrocarbon based sulfur solvent systems and methods Contemplated configurations and methods for elemental sulfur removal from various gases, and especially well acid gases employ a hydrocarbon solvent that dissolves the sulfur to form a rich solvent and that is then regenerated by hydrotreating. Thus, sulfur is remov... | 08/02/2011 |
| 7927403 | Method for absorption of acid gases The invention relates to a method for the absorption of acid gases, such as CO2 and H2S, from gas mixtures. According to the invention, acid gases are absorbed from a gas mixture by contacting this gas mixture with a liquid in which is dissolved so high a concentrat... | 04/19/2011 |
| 7857891 | Composition and method for removal of carbonylsulfide from acid gas containing same Novel solvent composition for selective removal of COS from a gas stream containing same, said composition comprising a) at least one polyalkylene glycol alkyl ether of the formula (I) or 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone or a mixture of N-formylmor... | 12/28/2010 |
| 7758673 | Process for removing carbon dioxide from gas mixtures The present invention relates to a process for removing carbon dioxide and optionally hydrogen sulphide and/or COS from a gas stream containing these compounds by washing the gas with an aqueous washing solution containing water, sulfolane and a secondary or tertiar... | 07/20/2010 |
| 7655072 | Process for purifying COgas streams A process for purifying CO2 offgas streams to free them of chemical compounds, and to the recycling of the purified gas streams into the production process. ... | 02/02/2010 |
| 7550033 | Process for removing sulfides A method for removing organic sulfur compounds from a vent gas is described. Also described is an apparatus for absorbing organic sulfur compounds from vent gas. ... | 06/23/2009 |
| 7459012 | Solution and method for scavenging sulphur compounds There is disclosed herein a solution for removing a sulphur compound or carbon dioxide from a fluid and methods for its use, said solution comprising sulphuric acid, a metal at between about 0.05 to 10 percent by weight, an amine at between about 10 to 80 percent by... | 12/02/2008 |
| 7442233 | Integrated heavy hydrocarbon removal, amine treating and dehydration The present invention is directed to an improved integrated process for the removal of heavy hydrocarbons, carbon dioxide, hydrogen sulfide, and water from a raw natural gas feed stream. More specifically, the integrated process of the present invention comprises a ... | 10/28/2008 |
| 7424808 | Configurations and methods of acid gas removal A plant includes an absorber (105) that receives a feed gas (10) at a pressure of at least 400 psig and comprising at least 5 mol % carbon dioxide, wherein the absorber (105) is operated at an isothermal or decreasing top-to-bottom thermal gradi... | 09/16/2008 |
| 7396388 | Integrated heavy hydrocarbon removal, amine treating and dehydration The present invention is directed to an improved integrated process for the removal of heavy hydrocarbons, carbon dioxide, hydrogen sulfide, and water from a raw natural gas feed stream. More specifically, the integrated process of the present invention comprises a ... | 07/08/2008 |
| 7326286 | Exhaust gas treating tower Provided is an exhaust gas treating tower in which exhaust gas flow velocity is increased more than a prior art case so that exhaust gas treating efficiency can be enhanced or the exhaust gas treating tower can be made compact if equivalent performance is to be main... | 02/05/2008 |
| 7309382 | Use of a two-phase turbine in a gas treating process The gas to be processed, flowing in through line 10, contains impurities. This gas is contacted in column C1 with a solvent flowing in through line 18. The scrubbed gas is discharged through line 19. The impurity-laden solvent recovered t... | 12/18/2007 |
| 7288140 | Wet process gas treatment apparatus In a wet-process gas treatment method of treating an acid gas by using at least two treating columns connected in series, a ratio of the concentration of an acid gas at an outlet to a concentration of the acid gas at an inlet of a first treating column is set higher... | 10/30/2007 |
| 7273513 | Acid gas removal The use of turbulent contactors to simultaneously absorb selected acid gas components from a gas stream and flash off hydrocarbons entrained in a liquid stream which include a solvent or reagent for the selected gas component. In particular, the method comprises fee... | 09/25/2007 |
| 7264786 | Method of scavenging hydrogen sulfide and/or mercaptans from fluid and gas streams Hydrogen sulfide and mercaptans may be removed from a fluid or gaseous stream by reacting the hydrogen sulfide and mercaptans in the stream with a scavenger selected from a: (i.) 1,3,5-trisalkanylamino hexahydro-1,3,5-triazine deri... | 09/04/2007 |
| 7238223 | Acoustical stimulation of vapor diffusion system and method An apparatus for removing constituents from a fluid stream is provided. The apparatus includes a duct, a collection device, a sorbent injector, and an acoustic generator. The duct has a fluid passageway to receive a fluid stream having constituents. The collection d... | 07/03/2007 |
| 7211128 | Method of purifying a natural gas by mercaptan adsorption The raw natural gas is pretreated in treating unit 30. The treated gas is then purified by adsorption of the mercaptans in first enclosure 31. The various cuts that make up the purified gas are separated in fractionating unit 34. Part of the met... | 05/01/2007 |
| 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 |
| 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 |
| 7147691 | Acid gas enrichment process The arrangements described herein are based upon a theory of selective absorption of hydrogen sulphide over carbon dioxide from gas based on countercurrent contact between gas and tertiary or other amines which exhibit preferential affinity for H2S over C... | 12/12/2006 |
| 7121115 | Sour natural gas treating method The invention relates to a method for treating a natural gas, saturated or not with water, containing essentially hydrocarbons, a substantial amount of hydrogen sulfide and possibly carbon dioxide. The method of the invention comprises a condensation stage intended ... | 10/17/2006 |
| 7097762 | Modular waste water treatment system The modular waste water treatment system receives waste water from a waste water source containing organic waste and produces a treated water effluent. The modular system includes bioreactors and a bioreactor support module. The bioreactors receive a waste water mix... | 08/29/2006 |
| 7077884 | Hydrogen sulfide scrubber using polymeric amine and associated methods A hydrogen sulfide scrubber includes first and second scrubber tanks with scrubber media contained therein. Scrubbing solution circulators each include a dispenser for dispensing scrubbing solution into contact with the scrubber media, a sump for collecting the scru... | 07/18/2006 |
| 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 |
| 7018450 | Natural gas deacidizing method The natural gas is successively contacted in column CA with a relatively methanol-rich solvent flowing in through line 4, then with a relatively poor solvent flowing in through line 9. The acid gas-containing solvent recovered through line 3 at ... | 03/28/2006 |
| 7018451 | Fluid separation system A method of removing acid gas components from a gas mixture. Certain embodiments of the method involve bringing the gas mixture into contact with a liquid solvent or reagent for the acid gases in a first turbulent contactor and subjecting the gas mixture and liquid ... | 03/28/2006 |
| 7004996 | Process for the removal of the hydrogen sulfide contained in natural gas Process for the removal of the hydrogen sulfide contained in natural gas, which comprises: a. absorbing the hydrogen sulfide present in natural gas by means of a virgin naphtha, in an adsorbing device and with a molar ratio virgin naphtha/H2S... | 02/28/2006 |
| 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 |
| 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 |
| 6926757 | Method for the concentration of spent acid The invention relates to a method for the concentration of the spent acid produced in connection with the scrubbing smelter or roaster gas. The hot gas produced is scrubbed first by dry and then by wet separation, and the scrubbed gas is conducted to the manufacture... | 08/09/2005 |
| 6923852 | Flue gas desulfurization system with a stepped tray A stepped, perforated tray is provided for increasing the available gas-slurry contact area in a flue gas desulfurization chamber. The tray redirects the horizontal flow upwardly through the tray for increased surface area and contact time with slurry for removing S... | 08/02/2005 |
| 6893484 | Low operating pressure gas scrubber Provided herein is an apparatus for scrubbing either acidic or alkaline impurities from gas streams, wherein the gas streams to be scrubbed exist at a pressure which is only slightly higher than ambient pressure. An apparatus according to a preferred form of the inv... | 05/17/2005 |
| 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 |
| 6881243 | Method for removing acidic gases from waste gas A method for removing acidic gases from waste gases is disclosed. The invention relates to a method for removing acid gases, in particular from SO2 and NOx, by contacting the waste gas with an emulsion of water in organic sulfoxides, in particu... | 04/19/2005 |
| 6881244 | Method and device for preventing deposits in steam systems The present invention relates to a method for preventing the deposition of contaminants in steam systems. In a method of this type, deposits are prevented in a simple and economic manner by metering an additive into the steam, which additive adheres to the steam-sid... | 04/19/2005 |
| 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 |
| 6773582 | Drinking water treatment system including hydrogen sulfide scrubber using triazine compound and associated methods A drinking water treatment system includes a pump for pumping water from an aquifer, an aerator connected downstream from the pump for generating an outlet water flow and a hydrogen sulfide-containing gas flow, and a hydrogen sulfide scrubber for scrubbing the hydro... | 08/10/2004 |
| 6735979 | Process for pretreating a natural gas containing acid gases A process for pretreating a very acid natural gas containing a substantial amount of hydrogen sulfide (H2S), possibly combined with carbon dioxide (CO2), includes at least a stage wherein the initial natural gas is contacted in a distillation c... | 05/18/2004 |
