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| Number | Title | Issue Date |
| 6726852 | Method of manufacturing synthesis gas A method of manufacturing a synthesis gas containing hydrogen and carbon monoxide comprises steps of removing only hydrogen sulfide from a natural gas containing hydrogen sulfide and carbon dioxide by permitting the natural gas to pass through a hydrogen sulfide-rem... | 04/27/2004 |
| 6485697 | Methods for removing sulfur containing compounds and carbon dioxide from gas mixtures Process for the removal of carbon dioxide (CO2) and minor sulfur compounds--mainly hydrogen sulfide (H2 S)--from a sour gas mixture, such as natural gas, iron ore reduction gas, etc. The process uses a continuous absorption process w... | 11/26/2002 |
| 6387337 | Carbon dioxide capture process with regenerable sorbents A process to remove carbon dioxide from a gas stream using a cross-flow, or a moving-bed reactor. In the reactor the gas contacts an active material that is an alkali-metal compound, such as an alkali-metal carbonate, alkali-metal oxide, or alkali-metal h... | 05/14/2002 |
| 6348129 | Treatment of pulp mill condensate with ozone An aqueous stream such as pulp mill condensate containing one or more sulfur compounds is treated by (a) reacting an aqueous feed stream containing TRS contaminant selected from the group consisting of hydrogen sulfide, methyl mercaptan, dimethyl sulfide,... | 02/19/2002 |
| 5736240 | Amorphous rare earth oxides A stable amorphous rare earth oxide, such as Y2 O3, including a stabilizer, such as carbon, silicon carbide, or hafnium oxide. The stable amorphous rare earth oxide can be used in a dielectric layer in a magneto-optical recording med... | 04/07/1998 |
| 5716587 | Apparatus for removal of contaminates from a gas stream An apparatus is disclosed for removal of contaminate(s) from a gas stream in an oil or gas refinery using an absorber-regenerator process wherein a portion of the contaminate rich overhead gas from the regenerator is utilized to increase the partial press... | 02/10/1998 |
| 5450892 | Alkaline scrubber for condensate stripper off-gases This invention relates to an alkaline scrubber for condensate stripper off-gases. In particular, this invention relates a process for selectively removing hydrogen sulfide and methyl mercaptan from a gas stream containing these compounds and methanol. Suc... | 09/19/1995 |
| 5434329 | Treatment of spent refinery caustic A hydrocarbon stream is washed with caustic solution to reactively remove hydrogen sulfide and produce a spent caustic solution containing sulfide reaction products. The spent caustic solution is stripped with concentrated carbon dioxide to reactively rem... | 07/18/1995 |
| 5256384 | Activated carbon process for removing hydrogen sulfide from gases To a gas which contains H2 S and water vapor and which is to be desulfurized oxygen is added at such a rate that the gas contains 1 to 20 moles O2 per mole of H2 S. At a temperature in the range of 50° to 180° C. the gas... | 10/26/1993 |
| 4889701 | Process for oxidizing multivalent metals A process for oxidizing a metal from a lower valence state to a higher valence state comprises contacting the metal, usually contained in a solution, with a sufficient amount of an oxygen-containing gas to provide at least about 300% excess of stoichiomet... | 12/26/1989 |
| 4510124 | System for recovery of CO2 from flue gases containing SO2 An improved system for recovering CO2 from flue gases containing SO2 at low CO2 partial pressure. The system includes the use of K2 CO3 as the solvent, regeneration of the solvent, and removal of SO | 04/09/1985 |
| 4431617 | Methods for removing malodorous sulfur compounds from pulp mill flue gases and the like by using green liquor An improved method for removing malodorous sulfur compounds from flue gases generated in kraft or sodium sulfite pulping operations and the like by the absorption process using green liquor, an aqueous solution containing sodium sulfide and sodium carbona... | 02/14/1984 |
| 4406867 | Process for the purification of non-reacting gases Regenerative process for the purification of a non-reacting industrial gas stream by removal of trace amounts of carbon dioxide therefrom, comprising contacting said gas stream with non-aqueous liquid solution of at least one member selected from the grou... | 09/27/1983 |
| 4405577 | Non-sterically hindered-sterically hindered amine co-promoted acid gas scrubbing solution and process for using same The present invention relates to an alkaline promoter system comprising specific mixtures of nonsterically hindered amino compounds and sterically hindered amino acids and their use in acid gas scrubbing processes. The preferred promoter system comprises ... | 09/20/1983 |
| 4405586 | N-Secondary butyl glycine promoted acid gas scrubbing process The present invention relates to an alkaline salt promoter system which includes N-secondary butyl glycine and its use in acid gas scrubbing processes.... | 09/20/1983 |
| 4367258 | Process for the decarbonation of gases Decarbonation of gases with solutions of alkali metal carbonates and with alkanolamine solutions is improved by exploiting the heat of the vapors exiting the head of the alkanolamine solution regeneration column and also the heat of fluids condensed at th... | 01/04/1983 |
| 4297330 | Process of selectively desulfurizing gases In a process of selectively desulfurizing gases which contain hydrogen sulfide and carbon dioxide comprising scrubbing the gases with an aqueous potassium carbonate solution under superatmospheric pressure and at temperatures of about 100° C., regenerati... | 10/27/1981 |
| 4293531 | Selective removal of H2 S from gas mixtures containing CO2 and H2 S A process for selectively absorbing H2 S from gas mixtures which contain CO2 and H2 S in a molar ratio of 4:1 or greater and in which the gas flow rate varies substantially. Alkali metal carbonate solutions are used with a... | 10/06/1981 |
| 4258019 | Process of regenerating alkali carbonate solutions formed by the desulfurization of hot gases A process for the selective removal of hydrogen sulfide from a gas containing hydrogen sulfide and carbon dioxide wherein said gas is contacted at superatmospheric pressure with an alkali metal carbonate solution, the resultant solution which contains hyd... | 03/24/1981 |
| 4198378 | Process for removing CO2, H2 S and other gaseous impurities from gaseous mixtures A process for removing gaseous impurities such as CO2 and/or H2 S from a gaseous mixture obtained by reacting combustible substances with steam, said steam being produced in boilers fed with water previously purified in degassing col... | 04/15/1980 |
| 3966876 | Gas purification Gas purification processes for removing hydrogen sulphide (H2 S) from a foul gas stream, such as coal carbonization gases, involving a circulating liquid reagent in which the H2 S is absorbed and converted to sulphur which is recover... | 06/29/1976 |
