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| Number | Title | Issue Date |
| 8062619 | Process and device for desulfurization of a gas, comprising a stage for elimination of sulfur by cooling a gas stream A process and apparatus for the treatment of a gas that contains hydrogen sulfide and sulfurous anhydride, in which: a) the gas (3) contacts with an organic solvent (1) containing a catalyst in a gas-liquid reactor-contactor (2) so as to recover... | 11/22/2011 |
| 7985397 | Method of treating hydrogen sulfide, method of producing hydrogen, and photocatalytic-reaction apparatus A method of treating hydrogen sulfide or producing hydrogen which comprises disposing a liquid tank having a photocatalyst electrode comprising a photocatalyst and a liquid tank having a metal electrode so that the two liquid tanks are separated from each other by a... | 07/26/2011 |
| 7951353 | Flow control method and apparatus for a continuous multiple zone mass transfer An apparatus and method of contacting a liquid with different gases sequentially in separate mass transfer zones within a single vessel, the mass transfer zones operatively in fluid communication with each other, including intimately contacting the liquid with a pro... | 05/31/2011 |
| 7837970 | Process and plant for the production of sulphuric acid The invention relates to a process and plant for producing sulphuric acid by catalytic oxidation of SO2 to form SO3 in a converter with at least one contact stage, the SO3-containing process gas, after it has passed through at least ... | 11/23/2010 |
| 7811544 | Sulfur recovery process A method for recovering sulfur from a sulfur-bearing process gas stream in which a process gas stream comprising H2S and/or SO2 is contacted with a lean mixture of a lean UCSRP solution and a catalyst for promotion of a reaction between H2... | 10/12/2010 |
| 7658906 | Sulfur recovery plant Novel sulfur recovery plants, and processes utilizing these plants are disclosed. These apparatuses eliminate the use of a condenser between the waste heat boiler and first Claus catalytic reactors, and also eliminate the use of reheaters in between Claus catalytic ... | 02/09/2010 |
| 7655213 | Direct oxidation of sulfur with carbon dioxide recycle A method for removing hydrogen sulfide to produce elemental sulfur from a synthesis gas feed stream containing hydrogen sulfide, carbon monoxide, hydrogen, carbon dioxide and water using direct oxidation of hydrogen sulfide by contacting a feed stream containing syn... | 02/02/2010 |
| 7597871 | Steam modified Claus process Disclosed is a method for treating a gas stream rich in hydrogen sulfide by providing one or more feed gas streams rich in hydrogen sulfide into a Claus reaction furnace, providing air into the Claus reaction furnace, providing supplemental oxygen into the Claus rea... | 10/06/2009 |
| 7560088 | Compact sulfur recovery plant and process A compact sulfur recovery system is disclosed which includes an upflow orientation for the gases through a primary structure including a catalytic partial oxidation reaction zone, a first temperature-control zone, a first Claus catalytic reaction zone, a second temp... | 07/14/2009 |
| 7553473 | Process for the removal of hydrogen sulfide, by means of its oxidation in the presence of hetero polyacids Hydrogen sulfide is oxidized to sulfur by means of treatment with an aqueous acid solution containing trivalent iron and a hetero polyacid having formula (I): HnXVyM(12-y)O40; or a sole hetero polyacid having formula (II):... | 06/30/2009 |
| 7544344 | Process for recovering sulphur from a gas stream containing hydrogen sulphide A feed gas stream containing hydrogen sulfide is subjected to a Claus reaction in a Claus furnace (16). Oxygen or oxygen-enriched air containing at least 80% by volume oxygen is supplied to the furnace (16) to support combustion of the hydrogen sulfide... | 06/09/2009 |
| 7531159 | Method for extracting HS from sour gas This invention teaches a process that includes extraction of gas in which the presence of foam results in the carry over in the outlet gas stream of excessive liquids and/or solids, including the steps of injecting the foam laden gas stream tangentially into a cyclo... | 05/12/2009 |
| 7501111 | Increased capacity sulfur recovery plant and process for recovering elemental sulfur Claus sulfur recovery plants that include one or more single-stage or multi-stage compact tubular Claus catalytic reactor-heat exchanger units are disclosed. In some instances, these new or improved Claus plants additionally include one or more compact heat exchange... | 03/10/2009 |
| 7442290 | Mesoporous aluminum oxide, preparation and use thereof Mesoporous aluminum oxides with high surface areas have been synthesized using inexpensive, small organic templating agents instead of surfactants. Optionally, some of the aluminum can be framework-substituted by one or more other elements. The material has high the... | 10/28/2008 |
| 7438886 | Chemical-biological process for the removal of HS from a gas The present application relates to a process for removing hydrogen sulfide H2S from a gas (1) by contacting said gas with a liquid solution (2) containing ferric sulfate in an absorption column (RC). Ferric sulfate and H2S react a... | 10/21/2008 |
| 7427383 | Hydrogen sulfide removal method and system for treating gaseous process streams A method and system for removing hydrogen sulfide from gaseous process streams, such as sour gas streams are disclosed and described. A gaseous stream containing hydrogen sulfide can be contacted with an aqueous silicon-containing composition under high shear condit... | 09/23/2008 |
| 7419652 | Process for removing sulfur particles from an aqueous catalyst solution and for removing hydrogen sulfide and recovering sulfur from a gas stream The invention relates to a process for removing hydrogen sulfide and recovering sulfur from a gas stream, comprising the steps of: contacting said gas stream with an aqueous catalyst solution of a polyvalent metal redox catalyst in a contacting zone to absorb said h... | 09/02/2008 |
| 7396522 | Catalyst useful for removal of hydrogen sulphide from gas stream and its conversion to sulphur, a process for preparing such catalyst and a method for removing of hydrogen sulphide using said catalyst The present invention relates to a catalyst useful for removal of hydrogen sulphide from gas streams and its conversion to sulphur, a process for preparing such catalyst and a method for removing of hydrogen sulphide using said catalyst. ... | 07/08/2008 |
| 7378068 | Electrochemical process for decomposition of hydrogen sulfide and production of sulfur The present invention includes a process for the removal of hydrogen sulfide from hydrogen sulfide gas containing gaseous streams. In one embodiment, the process comprises feeding a sulfide ion containing solution to an oxidation unit. The method further comprises f... | 05/27/2008 |
| 7374742 | Direct sulfur recovery system The present invention provides a method for removing sulfur species from a gas stream without the use of a sulfur species removal process, such as an amine scrub. The sulfur species are removed by directly subjecting the gas stream to a sulfur recovery process, such... | 05/20/2008 |
| 7357908 | Apparatus and catalytic partial oxidation process for recovering sulfur from an HS-containing gas stream The disclosed sulfur recovery system and process avoid some of the operational problems of conventional Claus plants and processes by replacing the reaction burner and furnace tube of a conventional Claus plant with a more efficient short contact time catalytic reac... | 04/15/2008 |
| 7357905 | Process for eliminating sulfur-containing compounds by direct oxidation The invention relates to a process for direct oxidation into sulfur and/or into sulfate of sulfur-containing compounds that are contained in an amount that is less than 10% by volume in a gas, in which said gas is brought into contact with an oxidation catalyst that... | 04/15/2008 |
| 7354564 | Partial oxidation of hydrogen sulphide A method of conducting the partial oxidation to sulphur in at least one furnace of part of the hydrogen sulphide content of a feed gas mixture containing from 10 to 60% by volume of hydrogen sulphide but including at least one aromatic hydrocarbon impurity typically... | 04/08/2008 |
| 7351392 | Process for the high recovery efficiency of sulfur from an acid gas stream A combined process for the recovery of sulfur from an acid gas stream. The combined process includes both a Claus unit and a unit for treating the Claus tail gas with caustic to remove hydrogen sulfide therefrom and to biologically oxidize the hydrogen sulfide using... | 04/01/2008 |
| 7335253 | Process for preparing a sulphur cement product The invention provides a process for preparing a sulphur cement product comprising the following steps: (a) selectively oxidising hydrogen sulphide to elemental sulphur by contacting, in a reaction zone, a hydrogen sulphide contain... | 02/26/2008 |
| 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 |
| 7326392 | HS scavenging method A method for removing H2S from H2S-containing gaseous streams in which an H2S-containing gaseous stream is introduced into a flow channel and at least one liquid chemical H2S scavenging agent is also introduced into the fl... | 02/05/2008 |
| 7326397 | Catalytic partial oxidation process for recovering sulfur from an HS-containing gas stream A process for purifying a light hydrocarbon stream containing H2S is disclosed in which the selective catalytic partial oxidation of the H2S component is carried out while the hydrocarbon components slip through substantially unconverted. A cat... | 02/05/2008 |
| 7316806 | Modifying catalyst for partial oxidation and method for modification A reforming catalyst for partial oxidation to reform hydrocarbon compound including a sulfur-containing compound includes platinum and rhodium. Even in reforming a hydrocarbon compound including a sulfur-containing compound such as, for example, a town gas, the cata... | 01/08/2008 |
| 7311891 | Process for the recovery of sulfur from Claus tail gas streams Recovering sulfur from a gas stream containing hydrogen sulfide by oxidizing the gas stream to convert the hydrogen sulfide in the gas stream to sulfur oxide, and thus form a sulfur oxide enriched gas stream. The sulfur oxide enriched gas stream is contacted with a ... | 12/25/2007 |
| 7291320 | Process for the selective oxidation of hydrogen sulfhide A process for the selective oxidation of hydrogen sulphide in a hydrogen sulphide containing feed gas to elemental sulphur, wherein the hydrogen sulphide containing feed gas (3), an inert liquid medium (5), and a molecular-oxygen containing gas (4 | 11/06/2007 |
| 7282193 | Method for energy recovery from hydrogen sulfide A method for producing sulfur and energy from an acid gas stream containing hydrogen sulfide by partially combusting the acid gas stream to produce a combustion product gas, mixing a sulfur dioxide stream with the combustion product gas, separating sulfur from the m... | 10/16/2007 |
| 7279148 | Oxidizer and oxidation process for a desulphurization process An improved oxidizer for liquid reduction-oxidation desulphurization processes uses a hollow fiber membrane contactor. A pressurized, oxygen containing gas stream is introduced into the interior of the hollow fiber membrane while a liquid reduction-oxidation catalys... | 10/09/2007 |
| 7258848 | Process for scrubbing ammonia from acid gases comprising ammonia and hydrogen sulfide The present invention provides a process for removing ammonia as an aqueous salt solution from an acid gas comprising ammonia and hydrogen sulfide. A strong acid, such as sulfuric acid, is used as a scrubbing agent to convert ammonia to an ammonium salt. Control of ... | 08/21/2007 |
| 7250149 | Sulfur gas treatment process The present invention comprises a method of treating an off-gas stream from a refining process to remove sulfur compounds. A portion of the off-gas stream containing hydrogen sulfide is injected at the front end of the thermal reactor and in at least one other locat... | 07/31/2007 |
| 7226883 | Oxidizer and oxidation process for a desulphurization process An improved oxidizer for liquid reduction-oxidation desulphurization processes uses a hollow fiber membrane contactor. A pressurized, oxygen containing gas stream is introduced into the interior of the hollow fiber membrane while a liquid reduction-oxidation catalys... | 06/05/2007 |
| 7226572 | Compact sulfur recovery plant and process A compact sulfur recovery system is disclosed which comprises a primary structure including a catalytic partial oxidation reaction zone, a first temperature-control zone, a first Claus catalytic reaction zone, a second temperature-control zone, a first liquid sulfur... | 06/05/2007 |
| 7189381 | Method of scrubbing lower mass sulfides with a sulfide scrubbing medium capable of regeneration A method of scrubbing lower mass sulfides with a sulfide scrubbing medium capable of regeneration. The sequential order of gas flow through three vessels is altered. A first of the three vessels is maintained in a scrubbing mode, scrubbing to breakthrough sulphur fr... | 03/13/2007 |
| 7183329 | Process for the activation of a catalyst comprising a cobalt compound and a support A process for the preparation of a catalyst which comprises activating a catalyst precursor comprising a cobalt compound and a support with a gas comprising at least 5 mol % of a hydrocarbon. ... | 02/27/2007 |
| 7179368 | Method for desulfurizing thiophene derivatives contained in fuels The invention concerns a method for selectively desulphurizing thiopene compounds contained in hydrocarbons derived from crude oil distillation, whether refined or not, which consists in oxidising the thiophene sulphur atoms into sulphone in the presence of an oxidi... | 02/20/2007 |
