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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...
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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...
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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...
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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...
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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...
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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...
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7326392 |
H2S scavenging method
A method for removing H 2 S from H 2 S-containing gaseous streams in which an H 2 S-containing gaseous stream is introduced into a flow channel and at least one liquid chemical H 2 S scavenging...
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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...
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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...
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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...
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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...
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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...
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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...
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7172746 |
Temperature moderated claus process
Disclosed is a method for treating a feed gas stream rich in hydrogen sulfide by partially combusting the feed gas stream rich in hydrogen sulfide with an oxygen-enriched gas in a Claus reaction...
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7163670 |
Membrane for hydrogen recovery from streams containing hydrogen sulfide
A membrane for hydrogen recovery from streams containing hydrogen sulfide is provided. The membrane comprises a substrate, a hydrogen permeable first membrane layer deposited on the substrate, and...
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7157070 |
Method for purifying gas containing hydrocarbons
A hydrocarbon gas containing H 2 S, mercaptans and CO 2 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 H 2...
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7138101 |
Two-stage catalytic process for recovering sulfur from an H2S-containing gas stream
Apparatus and process for recovering elemental sulfur from a H 2 S-containing waste gas stream are disclosed. The apparatus preferably comprises a first reaction zone for carrying out the catalytic...
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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 H 2 S-containing feed gas are partially oxidized to...
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7108842 |
Process for the catalytic partial oxidation of H2S using staged addition of oxygen
A multistage oxygen-added catalytic partial oxidation process and apparatus for converting H 2 S in an acid gas stream to elemental sulfur and water are disclosed. Each staged addition of oxygen or...
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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...
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6962683 |
Method of removing and recovering elemental sulfur from highly reducing gas streams containing sulfur gases
A method is provided for removal of sulfur gases and recovery of elemental sulfur from sulfur gas containing supply streams, such as syngas or coal gas, by contacting the supply stream with a...
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6902713 |
Method for partially oxidizing a gas stream comprising hydrogen sulphide and ammonia
A method for partially oxidizing, in a Claus furnace, at least one gas containing hydrogen sulfide and ammonia with at least one gas rich in oxygen. The residual ammonia content at the outlet of...
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6669921 |
Process for regenerating a catalytic redox solution, to include measuring the oxygen dissolved in the regeneration effluent and its application to desulfurization
The present invention relates to a process for regenerating an at least partly reduced catalytic redox solution. The solution includes at least one polyvalent metal chelated by a chelating agent...
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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...
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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...
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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...
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6610264 |
Process and system for desulfurizing a gas stream
A process and system is disclosed for removing sulfur from tail-gas emitted from a Claus sulfur recovery process. First, the tail-gas is oxidized so as to convert sulfur therein to sulfur oxides....
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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...
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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...
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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...
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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...
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6558646 |
Method for increasing the lifetime of stretford solution
A method is provided for increasing the lifetime of Stretford solution by reducing or eliminating the generation of undesirable thiosulfate salts. The method has three major aspects. First,...
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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 )...
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6531109 |
Treatment of a combustible gas stream
A process and apparatus for recovering sulphur from a combustible gas stream comprising hydrogen sulphide, air, commercially pure oxygen or oxygen-enriched air. The combustible gas stream are fed...
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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...
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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...
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6508998 |
Temperature moderation of an oxygen enriched claus sulfur plant using an ejector
A process is set forth for improving an oxygen-enriched Claus plant by recycling through an ejector effluent from the first condenser back to the reaction furnace to moderate oxygen induced high...
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6506357 |
Sulphur recovery
Sulphur is recovered from a first gas stream comprising hydrogen sulphide and at least 50% by volume of ammonia and from a second gas stream comprising hydrogen sulphide but essentially no ammonia,...
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6506356 |
Catalyst for oxidizing hydrogen sulfide gas and method for recovering elemental sulfur using the same
A catalyst for recovering elemental sulfur by the selective oxidation of hydrogen sulfide is represented by the following chemical formula: V a Ti b X c O f wherein, a is such a mole number that...
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6506349 |
Process for removal of contaminants from a gas stream
A selected contaminant is removed from a gas stream containing an unselected component that is also absorbed by the solvent, although to a lesser degree than the selected contaminant. In a typical...
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6495117 |
Process for recovering sulfur from H2S-bearing gas
Elemental sulfur is recovered from the hydrogen sulfide present in natural gases and other process gases by treating the hydrogen sulfide-containing gas in a series arrangement of a liquid-phase...
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6488905 |
Destruction of waste gas
A gas stream containing at least 50% by volume of ammonia but eventually no hydrogen sulphide is burned in a reaction region which is supplied with oxygen and oxygen-enriched air. Both combustion...
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6444185 |
Process for recovering as sulfur the compounds H2S, SO2, COS and/or CS2 in a tail gas from a sulfur plant
A process is provided to recover residual H 2 S, SO 2 , COS and CS 2 in the tail gas from a sulphur recovery process. The tail gas is oxidized and hydrolyzed at a temperature of from 180° C. to...
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6432375 |
Method for removing hydrogen sulfide from gas streams
The invention disclosed relates to a process for removing hydrogen sulfide from a gas stream, such as sour natural gas, with the formation of elemental sulfur as a by-product. By controlling the...
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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 H 2 S are disclosed. A preferred method comprises mixing the stream containing H 2 S with a light hydrocarbon stream and an oxygen...
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6375907 |
Hydrogen sulfide abatement with scale control and/or well acidizing
The emissions of hydrogen sulfide during the production of natural gas, oil or geothermal fluids from subterranean formations and the subsequent processing of these fluids is reduced by converting...
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6372193 |
Process for oxidizing the H2S contained at low concentration in a gas directly to sulphur by catalytic means and in the vapour pause
A process for catalytically oxidizing H 2 S contained in a gas directly to sulphur containing the following steps: combining the H 2 S-containing gas with a gas containing free oxygen in an amount...
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6352680 |
Partial combustion of hydrogen sulphide
Sulfur vapor is formed by partial oxidation of hydrogen sulphide. A burner is operated so as to establish a flame in a furnace in or into which the burner fires. There is supplied to the flame from...
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6299851 |
Method for oxidizing hydrogen sulfide to elemental sulfur
A method for selectively oxidizing hydrogen sulfide to elemental sulfur is disclosed. The method is performed at a temperature ranged from 50 to 400° C. and at a pressure ranged from 0.1 to 50...
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6287535 |
Treatment of combustible gas streams
A first combustible gas stream containing hydrogen sulphide is subjected to treatment in a first Claus plant including a first thermal Claus stage. Part of the hydrogen sulphide content of a second...
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