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| Number | Title | Issue Date |
| 7776308 | Apparatus and method for operating the apparatus for continuously recovering sulfur from gas containing HS In an apparatus for continuously recovering sulfur from a gas stream containing 0.1 to 3.0 vol-% H2S, further gaseous sulfur compounds and sulfur, the gas stream first is passed over a reduction stage consisting of hydrogenation catalyst and then over a s... | 08/17/2010 |
| 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 |
| 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 |
| 7342145 | Process for refining liquefied petroleum gas in a commercial scale The present invention relates to a novel process for refining the liquefied petroleum gas (LPG) in a commercial scale. The process comprises: sequentially performing fine desulfurization and mercaptan conversion of the LPG after alcohol amine treatment through desul... | 03/11/2008 |
| 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 |
| 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 |
| 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 |
| 7297651 | 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 sulfur particles from an aqueous catalyst solution used to remove hydrogen sulfide from a gas stream (1, 5), comprising the steps of directing a flow of a suspension (12) comprising reduced catalyst solut... | 11/20/2007 |
| 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 |
| 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 |
| 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 |
| 7138101 | Two-stage catalytic process for recovering sulfur from an HS-containing gas stream Apparatus and process for recovering elemental sulfur from a H2S-containing waste gas stream are disclosed. The apparatus preferably comprises a first reaction zone for carrying out the catalytic partial oxidation of H2S, a second reaction zone... | 11/21/2006 |
| 7122170 | Catalysts for SPOC™ enhanced synthesis gas production A process and system for producing synthesis gas by a SPOC® enhanced catalytic partial oxidation process is disclosed. Light hydrocarbons in a H2S-containing feed gas are partially oxidized to produce hydrogen and carbon monoxide over a catalyst that sim... | 10/17/2006 |
| 7108842 | Process for the catalytic partial oxidation of HS using staged addition of oxygen A multistage oxygen-added catalytic partial oxidation process and apparatus for converting H2S in an acid gas stream to elemental sulfur and water are disclosed. Each staged addition of oxygen or air at the top of the catalyst bed and at points along the ... | 09/19/2006 |
| 7060233 | Process for the simultaneous removal of sulfur and mercury A process for removing hydrogen sulfide, other sulfur-containing compounds and/or sulfur and mercury from a gas stream contaminated with mercury, hydrogen sulfide or both. The method comprises the step of selective oxidation of hydrogen sulfide (H2S) in a... | 06/13/2006 |
| 7036461 | Waste-heat boiler for a Clause plant The invention relates to a waste-heat boiler (3) for a Claus plant, comprising a steam generation chamber that is surrounded by a pressure-proof jacket (14), a long tube bundle (18) of heat exchanger tubes that extend through the steam generatio... | 05/02/2006 |
| 6946111 | Short contact time catalytic partial oxidation process for recovering sulfur from an H2S containing gas stream A process for removing sulfur from a H2S-containing gas stream is disclosed. A preferred embodiment of the process comprises incorporating a short contact time catalytic partial oxidation reactor, a cooling zone, and a condenser into a conventional refine... | 09/20/2005 |
| 6800269 | Short contact time catalytic sulfur recovery system for removing H2S from a waste gas stream An apparatus and process for recovering elemental sulfur from a H2S-containing waste gas stream are disclosed, along with a method of making a preferred catalyst for catalyzing the process. The apparatus preferably comprises a short contact time catalytic... | 10/05/2004 |
| 6652826 | Process for elimination of low concentrations of hydrogen sulfide in gas mixtures by catalytic oxidation A process is described for the elimination of hydrogen sulfide from gas mixtures by catalytic oxidation over activated carbon catalyst which converts the hydrogen sulfide to elemental sulfur and water, the former being sorbed by the activated carbon while... | 11/25/2003 |
| 6616908 | Treatment of a gas stream containing hydrogen sulphide Sour gas containing hydrogen sulphide has hydrogen sulphide absorbed therefrom in an absorbent in a vessel 4. A hydrogen sulphide rich gas stream is formed by desorbing hydrogen sulphide from the absorbent in a vessel 12. The resulting hydrogen sulphide r... | 09/09/2003 |
| 6596253 | Regeneration of a desulfurizing catalytic solution by means of an ejector In the desulfurization of a gaseous feed containing hydrogen sulfide, comprising contacting the gaseous feed with a catalytic solution containing a chelated polyvalent metal under suitable conditions for oxidation of the hydrogen sulfide to elementary sul... | 07/22/2003 |
| 6589498 | Process and device for treating a gas containing hydrogen sulfide, with recycling of the reduced catalytic solution A process intended for desulfurization of a gaseous feed containing hydrogen sulfide, includes at least the following stages: a) contacting the gaseous feed with a catalytic solution containing at least one polyvalent metal chelated by at least one chelat... | 07/08/2003 |
| 6579510 | SPOX-enhanced process for production of synthesis gas A method, system and catalysts for improving the yield of syngas from the catalytic partial oxidation of methane or other light hydrocarbons is disclosed. The increase in yield and selectivity for CO and H2 products results at least in part fro... | 06/17/2003 |
| 6569398 | Method for treating hydrogen sulfide-containing waste gases Disclosed is a method in which hydrogen sulfide-containing liquid sulfur is introduced into a containment vessel to partially fill the containment vessel and create a hydrogen sulfide-containing liquid sulfur phase and a hydrogen sulfide-containing vapor ... | 05/27/2003 |
| 6551570 | Hydrogen sulfide removal process Hydrogen sulfide is removed from gas streams by reaction with sulfur dioxide to produce sulfur. The reaction is effected in a reaction medium comprising a non-aqueous Lewis base with a pKb value of about 6 to about 11. The reaction medium posse... | 04/22/2003 |
| 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 |
| 6521201 | Process for recovery of high purity hydrophilic sulfur High quality hydrophilic sulfur is recovered from a biologial conversion zone in which a sulfur containing compound such as a sulfide is converted to elemental sulfur. The sulfur is rendered hydrophilic due to the fine particle size and attachment of biom... | 02/18/2003 |
| 6517801 | Treatment of gas streams containing hydrogen sulphide A feed gas stream containing hydrogen sulphide is subjected in a furnace 6 to reactions in which part of the hydrogen sulphide is burned to form sulphur dioxide, and is which the sulphur dioxide reacts with residual hydrogen sulphide to form sulphur vapor... | 02/11/2003 |
| 6416729 | Process for removing hydrogen sulfide from gas streams which include or are supplemented with sulfur dioxide In a known process and system wherein hydrogen sulfide is removed from a gaseous stream, using a non-aqueous scrubbing liquor which can be an organic solvent for elemental sulfur such as a phenylxylyl ethane in which are dissolved sulfur and a reaction-pr... | 07/09/2002 |
| 6413488 | Post conversion of a gas containing hydrogen sulphide, the elimination of sulphur crystallized by cooling A process and an apparatus are described for treatment of a gas containing hydrogen sulphide and sulphur dioxide, for example a Claus plant tail gas, in which the gas is brought into contact with an organic solvent (1) e.g. polyethylene glycol 400, contai... | 07/02/2002 |
| 6403051 | Recovery of sulfur from H2S and concurrent production of H2 using short contact time CPOX A method, apparatus and system for treating a stream containing H2 S are disclosed. A preferred method comprises mixing the stream containing H2 S with a light hydrocarbon stream and an oxygen containing stream to form a feed stream;... | 06/11/2002 |
| 6280698 | Removal of by-products in method for processing a gas containing hydrogen sulfide and sulfur dioxide A method for processing a gas, such as a Claus tail gas, containing at least hydrogen sulfide (H2 S) and at least sulfur dioxide (SO2), includes the steps of contacting the gas with a liquid solvent, such as polyethylene glycol, cont... | 08/28/2001 |
| 6277352 | Method and device for processing a gas containing hydrogen sulfide and sulfur dioxide, comprising a stage of removal of solid by-products A method for processing a gas containing at least hydrogen sulfide (H2 S) and at least sulfur dioxide (SO2), includes the following stages: contacting the gas with a liquid solvent, such as polyethylene glycol, containing at least on... | 08/21/2001 |
| 6235259 | Method and catalyst for direct sulphur oxidation of H2S contained in a gas A regenerative process for oxidizing H2 S contained in low concentration in a gas directly to sulphur including combining the H2 S-containing gas with a gas containing free oxygen in an amount to form an O2 /H2 ... | 05/22/2001 |
| 6214311 | Process for direct reduction of sulfur compounds to elemental sulfur in combination with the claus process The present invention is a process wherein a process gas comprising at least SO2 and H2S is reacted across a stage of SO2 reducing catalyst, thereby obtaining high conversion of at least the SO2 to elemental sulfur.... | 04/10/2001 |
| 6210454 | Apparatus for treating a gas containing hydrogen sulphide and sulphur dioxide An apparatus for treating a gas containing hydrogen sulphide and sulphur dioxide, comprising a liquid-gas reactor-contactor (2), means (3) for supplying gas to be treated and means (1) for supplying an organic solvent containing a catalyst, means (25) for... | 04/03/2001 |
| 6180079 | Wet oxidizing process In wet oxidizing process of an aqueous alkali waste which contains absorbed hydrogen sulfide and carbon dioxide, a convenient method for improving the safety in oxidizing operation and the efficiency in oxidation reaction. The process is characterized in ... | 01/30/2001 |
