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| Number | Title | Issue Date |
| 7988943 | Treatments of tail gas from a claus unit over an optimized sequence of catalysts For conversion of sulphur-containing compounds present in a gas comprising H2S and sulphur-containing compounds into additional H2S, a step A of contacting the gas with a reducing gas and a hydrogenation catalyst comprising cobalt, molybdenum a... | 08/02/2011 |
| 7736618 | Production of hydrogen sulphide in a reaction vessel The invention relates to a reaction vessel in which hydrogen sulphide is produced from sulphur and hydrogen, wherein the reaction vessel is partially or completely made up of a material which is resistant to the reaction mixture and its compounds and/or elements and... | 06/15/2010 |
| 7374737 | Use of a tiOcomposition as catalyst for hydrolyzing COS and/or HCN The invention concerns the use of a composition based on TiO2 as a catalyst for hydrolyzing COS and/or HCN in a gas mixture, said composition comprising at least 1% by weight of at least one sulphate of an alkaline-earth metal selected from calcium, bariu... | 05/20/2008 |
| 7081233 | Method and apparatus for degassing liquid sulfur A vessel is mounted external to a liquid sulfur storage pit for degassing liquid sulfur at atmospheric pressure. Liquid sulfur is re-circulated from the pit to a static mixing device extending from a head space to the liquid sulfur which provides intimate contact of... | 07/25/2006 |
| 7037485 | Steam methane reforming method A steam methane reforming method in which a feed stream is treated in a reactor containing a catalyst that is capable of promoting both hydrogenation and partial oxidation reactions. The reactor is either operated in a catalytic hydrogenation mode to convert olefins... | 05/02/2006 |
| 6919059 | Process and apparatus for recovering sulphur from a gas stream containing sulphide Oxygen or oxygen-enriched air is employed to support combustion in furnaces (16) and (26) of part of the hydrogen sulphide content of a first feed gas stream. Sulphur vapour is extracted in condenser (32) from the resulting gas mixture so as to ... | 07/19/2005 |
| 6893620 | Process and apparatus for recovering sulphur from a gas stream containing hydrogen sulphide Oxygen or oxygen-enriched air is employed to support combustion in furnace (16) of part of the hydrogen sulphide content of a first feed gas stream. Sulphur is extracted from the resulting gas stream in a sulphur condenser (26). Catalyst Claus reaction... | 05/17/2005 |
| 6852305 | Process for the production of hydrogen sulphide from elemental sulphur and use thereof in heavy metal recovery A process is provided for the production of hydrogen sulphide from the bacterial reduction of a mixture of a liquid and elemental sulfur with an electron donor, such as hydrogen gas, carbon monoxide or organic compounds. The bacteria may be Desulforomonas sp.... | 02/08/2005 |
| 6800261 | Process for the removal of sulphur compounds from gases The invention is directed to a process for the catalytic reduction of sulphur dioxide from a gas mixture at least containing 10 vol. % of water, in which process the gas mixture is passed over a sulphur resistant hydrogenation catalyst in sulphidic form, at a space ... | 10/05/2004 |
| 6676918 | Hydrogen sulfide removal from liquid sulfur A method for removing hydrogen sulfide from liquid sulfur, comprising introducing liquid sulfur containing hydrogen sulfide in an upstream portion of a conduit. The conduit has a fluid outlet in a downstream portion thereof located within a lower portion ... | 01/13/2004 |
| 6652827 | Process for the recovery of sulphur from a hydrogen sulphide, containing gas The invention is directed to a process for the recovery of sulphur from a hydrogen sulphide containing gas, which process comprises; i) oxidizing part of the hydrogen sulphide in a gaseous stream with oxygen or an oxygen containing gas in an oxidation sta... | 11/25/2003 |
| 6521196 | Process and catalyst/sorber for treating sulfur compound containing effluent A process for adjusting the ratio of sulfur dioxide to hydrogen disulfide from the regeneration of a catalytic system of a structured support for example a monolith coated with: (i) a metal oxide sorber component selected from the group consisting of Ti, ... | 02/18/2003 |
| 6342651 | Reductive combustion of ammonium salts of sulfuric acid A process is provided for the combustion of ammonium salts of sulfuric acid contained in aqueous media. More particularly, a reductive combustion process which produces a combustion gas containing a divalent sulfur compound having a high concentration of ... | 01/29/2002 |
| 6274109 | Conversion process for carbonyl sulfide and/or hydrogen cyanide contained in mixed gas Carbonyl sulfide and/or hydrogen cyanide contained in a mixed gas are/is converted by contacting the mixed gas with an alkalized chromium oxide-aluminum oxide catalyst in the presence of steam, wherein the mixed gas and the steam at a volume ratio of 0.05... | 08/14/2001 |
| 5972165 | Method of producing oxidized white liquor using dregs containing carbon particles White liquor produced from black liquor is partially or completed oxidized. The white liquor contains dregs that are utilized as a carbon based catalyst. Dregs are produced by separating the dregs from green liquor an intermediate product between the blac... | 10/26/1999 |
| 5942201 | Process utilizing titanium dioxide as a catalyst for the hydrolysis of carbonyl sulfide The hydrolysis of carbonyl sulfide is substantially improved by utilizing titanium dioxide particles as a catalyst. It is especially favorable, if the titanium dioxide particle are sintered and treated with sodium hydroxide or sodium aluminate. Through su... | 08/24/1999 |
| 5674463 | Process for the purification of carbon dioxide Sulfur compounds are removed from gaseous carbon dioxide by contacting the carbon dioxide with water vapor in the presence of a carbonyl sulfide hydrolysis catalyst, thereby converting carbonyl sulfide in the gas stream to hydrogen sulfide, contacting the... | 10/07/1997 |
| 5672326 | Method of treating vapors containing ammonia and hydrogen sulfide Ammonia and 5 to 40 volume percent hydrogen sulfide containing vapors which arise in the vaporization of process water from hydrogenation or a crude oil fraction or in gas treatment in a coking plant, can be subjected in a cracking catalyst reactor to bre... | 09/30/1997 |
| 5545388 | Methods for the synthesis of chemical compounds Methods for synthesis of chemical compounds by catalytic transfer hydrogenation comprise forming a mixture of a starting material, a hydrogen donor material and a catalyst. The catalyst is selected from a catalytic form of carbon, a polyethylene glycol ph... | 08/13/1996 |
| 5478548 | Methods for the synthesis of chemical compounds Methods for synthesis of chemical compounds by catalytic transfer hydrogenation comprise forming a mixture of a starting material, a hydrogen donor material and a catalyst. The catalyst is selected from a catalytic form of carbon, a polyethylene glycol ph... | 12/26/1995 |
| 5458861 | Desulfurizing a gas stream A multi-bed process of removing sulfur oxides and/or other combustible sulfur-containing compounds from a gas stream including combusting the other combustible sulfur-compounds when present in the gas stream with air or oxygen to convert such sulfur-conta... | 10/17/1995 |
| 5306476 | Continuous sulfur removal process A continuous process for the removal of hydrogen sulfide from a gas stream using a membrane comprising a metal oxide deposited on a porous support is disclosed.... | 04/26/1994 |
| 5192519 | Substituted stannosilicates and preparation thereof Highly crystalline substituted stannosilicates are formed by reacting a tin salt with a source of silica and a source of germanium, aluminum, zinc, gallium, and a hydroxide of a Group IA or Group IIA metal or an amine or alkylammonium compound.... | 03/09/1993 |
| 5173285 | Process for the manufacture of hydrogen sulfide The present invention relates to a process for the manufacture of hydrogen sulfide by reacting sulfur and hydrogen which comprises two hydrogenation reactions. The first hydrogenation reaction of the present invention comprises the steps of supplying hydr... | 12/22/1992 |
| 5171551 | Zirconium dioxide gas desulfurization catalyst Solid catalyst substrates based on zirconium dioxide and, optionally, titanium dioxide and/or cerium dioxide, e.g., honeycombs or monoliths, are well adapted for the desulfurization and catalytic conversion of industrial gases containing contaminating amo... | 12/15/1992 |
| 5106607 | Multilobar catalysts for the conversion of sulfur containing gaseous effluents Multilobar shaped catalyst particulates, e.g., tri- or quadrilobar particulates, well adapted for the catalytic conversion of gases containing compounds of sulfur, e.g. SO2, H2 S, COS and/or CS2, by the Claus reaction and/... | 04/21/1992 |
| 5030438 | Catalytic removal of hydrogen sulfides from liquid sulfur The invention is a catalytic process for removing H2 S and hydrogen polysulfides from liquid sulfur. The process comprises mixing a heterocyclic compound with the liquid sulfur and removing the hydrogen sulfide from the liquid sulfur by contact... | 07/09/1991 |
| 4892717 | Gas treating process Catalysts susceptible to deactivation by free oxygen or to reactions involving free oxygen are protected by scavenging the oxygen in the presence of an oxidation catalyst, so as to remove commingled oxygen from the reactants to be converted in the presenc... | 01/09/1990 |
| 4849204 | Catalytic removal of hydrogen sulfides from liquid sulfur The invention is a catalytic process for removing H2 S and hydrogen polysulfides from liquid sulfur. The process comprises mixing a heterocyclic compound with the liquid sulfur and removing the hydrogen sulfide from the liquid sulfur by contact... | 07/18/1989 |
| 4769224 | Process for the removal of hydrogen cyanide from a gas stream A process for removing HCN from gases, which may also contain a hydrogen halide, by hydrolysis in the presence of a supported metal from Group 3b and/or 4b, use being made of a silica-containing carrier or support.... | 09/06/1988 |
| 4729887 | Process and apparatus for degassing sulfur A process for the conversion of hydrogen polysulfide to hydrogen sulfide in liquid sulfur and removal of hydrogen sulfide from said liquid sulfur comprising a multistage process in which the sulfur is supplied to a holding zone, passed to a treatment zone... | 03/08/1988 |
| 4668491 | Process for the selective hydrolysis of inorganic sulfur compounds Process and catalyst for the selective catalytic hydrolysis of the inorganic sulfur compounds COS and/or CS2 being present in CO containing process gases. The process gas is passed over an alkalized chromium oxide-aluminum oxide catalyst in the... | 05/26/1987 |
| 4623533 | Desulfurization of H2 S-containing gases H2 S-containing gases are desulfurized by direct catalytic oxidation of the H2 S to elemental sulfur with an oxygen-containing gas at elevated temperatures by a method in which the catalyst used is a supported titanium dioxide cataly... | 11/18/1986 |
| 4532119 | Catalytic desulfurization of industrial waste gases Industrial waste gases containing objectionable/polluting compounds of sulfur, e.g., H2 S, SO2 and such organosulfur derivatives as COS, CS2 and mercaptans, are catalytically desulfurized, e.g., by Claus process, employing... | 07/30/1985 |
| 4511668 | Catalyst for use in hydrolysis of carbonyl sulfide A catalyst which comprises titanium oxide reinforcing material and oxides of one or more metals selected from Group Ia, Group IIa, Group IIb and Group IVb of the periodic table, the weight of said oxides corresponding to at least 0.5 wt. % of the weight o... | 04/16/1985 |
| 4460553 | Process for the hydrodesulfurization of natural gas containing organic sulfur compounds and oxygen Process for hydrodesulfurizing a gas comprising together methane, at least one organic sulfur compound and oxygen, characterized by the step of passing a mixture of said gas with a hydrogen containing gas on a palladium catalyst at a temperature of 300° ... | 07/17/1984 |
| 4404180 | Manufacture of hydrogen sulfide Methods and apparatus adaptable to continuous production of hydrogen sulfide by chemical reaction of sulfur with a gaseous sulfur-reducing reactant selected from methane or other hydrocarbons, hydrogen, carbon-containing compounds such as carbon disulfide... | 09/13/1983 |
| 4399112 | Process for the catalytic incineration of residual gases containing a low content of at least one sulfur compound selected from COS, CS2 and the mercaptans and possibility at least one member of the group A process for the catalytic incineration of residual gases containing a low content of H2 S and/or SO2, organic compounds of sulfur such as COS, CS2, mercaptans and possibly vapor and/or vesicular sulfur, comprising a hydr... | 08/16/1983 |
| 4388288 | Preparation of shaped titanium dioxide catalyst/carrier and catalysis of gaseous sulfur compounds therewith Shaped titanium oxide catalysts/carriers useful, e.g., for sulfur recovery via Claus catalysis, are prepared by (i) intimately admixing powdered, poorly crystalline and/or amorphous titanium oxide, said titanium oxide powder being characterized by a weigh... | 06/14/1983 |
| 4359450 | Process for the removal of acid gases from gaseous streams Hydrogen sulfide, carbon dioxide, and carbonyl sulfide are removed from a gas stream in a staged procedure characterized by absorption of the CO2 and COS and conversion of the hydrogen sulfide to produce sulfur in an absorbent mixture, hydrolys... | 11/16/1982 |
