Matches 151 - 200 out of 214 < 1 2 3 4 5 >
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4801443 Sulphur recovery process  
A process and apparatus for elemental sulphur recovery from acid gases. By this process, acid gas, a by-product of sour natural gas from crude oil processing plants, is mixed with air and...
4795620 Claus residual gas cleanup using tetraethylene glycol dimethyl ethers as SO.sub.2 scrubbing agent  
A process is disclosed for the purification of a gaseous stream contaminated at least with CO 2 and H 2 S. The gaseous stream is preheated and subjected, in the presence of recycled SO 2 , to a...
4786483 Process for removing hydrogen sulfide and mercury from gases  
Disclosed is a sorbent material for removing mercury and hydrogen sulfide from gases. The sorbent is a porous granular material which has been impregnated with a chemical compound capable of...
4784838 Method of stabilizing solutions of chelated polyvalent metals  
A cyclic process for removing H 2 S from a gaseous stream comprising contacting the gaseous stream with a solution of a chelated polyvalent metal to produce elemental sulfur, removing the...
4784775 Removal of hydrogen sulfide from sour water  
Sour water is treated to remove dissolved hydrogen sulfide by means of an aqueous chelated polyvalent metal solution in a continuous recirculating system, particularly an autocirculation system,...
4765969 Continuous process for scrubbing hydrogen sulfide to produce elemental sulfur  
A continuous process for removing hydrogen sulfide from a gas stream by contacting the gas stream with a solution of ammonium hydroxide to produce an effluent liquid stream comprising ammonium...
4758417 Gas treatment process  
The invention provides a process for the removal of hydrogen sulphide from contaminated gas which comprises contacting contaminated gas with an aqueous ferric-ion solution in a first reactor,...
4758416 Removal of H.sub.2 S from gas streams  
A process for the removal of H 2 S from sour gaseous streams is disclosed in which the sour gaseous stream is contacted with a solution containing solubilized iron chelates of nitrilotriacetic...
4725417 Process for removing sulfur oxides from a gas by means of an absorption mass regenerable by reaction with hydrogen sulfide  
The invention concerns a process for removing sulfur oxides and particularly sulfur dioxide contained in such gases as industrial fumes, wherein said gas is contacted with a solid absorbent...
4696802 Drilling geothermal wells with removal of H.sub.2 S  
Geothermal wells are drilled and the raw steam containing H 2 S gas and debris that is released is treated with an aqueous solution containing ferric chelate and one or more water soluble cationic...
4693881 Simultaneous separation and conversion to sulfur of H.sub.2 S  
This invention is a regenerable process for converting H 2 S to S by (1) reacting the H 2 S with Fe 2 (SO 4 ) 3 to form S, FeSO 4 and H 2 SO 4 ; (2) separating the S; oxidizing the FeSO 4 ...
4649032 Process for the selective removal of hydrogen sulfide from gaseous streams  
The invention relates to a process for the selective removal of hydrogen sulfide from a gaseous stream additionally containing carbon dioxide by contacting the gaseous stream with a polyvalent...
4581128 Hydrocarbon desulfurization process  
A sour liquid hydrocarbon feedstock is desulfurized upon contact with a hydrogen gas in the presence of a catalyst to obtain a low sulfur product and a hydrogen sulfide gas by-product. The hydrogen...
4575433 Method of generating chemiluminescent light  
A method of chemiluminescently determining a sulfide which is either hydrogen sulfide or methyl mercaptan by reacting the sulfide with chlorine dioxide at low pressure and under conditions which...
4544534 Catalytic desulfurization process of an acid gas containing H.sub.2 S  
Catalytic desulfurization process of an acid gas containing H 2 S, and optionally a total quantity of at most 3% by volume of CS 2 and/or COS, by contacting said acid gas and oxygen or air with a...
4526774 Separation of hydrogen sulfide from gaseous and non-aqueous liquid streams  
An indirect hydrogen sulfide conversion process for the production of elemental hydrogen and sulfur. The process is based upon the electrochemical oxidation of iodide in an aqueous solution with a...
4496371 Process for removal of hydrogen sulfide and carbon dioxide from gas streams  
A gas treating process is disclosed. Hydrogen sulfide and carbon dioxide are removed from a hydrocarbon vapor stream by absorption into an aqueous carbonate solution. Hydrogen sulfide picked up by...
4461755 Process for producing hydrogen and sulfur from hydrogen sulfide  
A novel process for producing hydrogen and sulfur via the thermal decomposition of hydrogen sulfide is disclosed. The thermal decomposition of hydrogen sulfide is accomplished by passing a hydrogen...
4461754 Method of removing hydrogen sulfide from gases utilizing a stabilized chelate solution  
A cyclic process for the removal of hydrogen sulfide, and carbon dioxide, from a variety of gas streams is disclosed. The gas stream containing the sour gas(es) is contacted with an aqueous...
4439412 Process for producing hydrogen from hydrogen sulphide in a gas fluidized bed reactor  
The present invention relates to a method of catalytic and thermochemical decomposition of hydrogen sulfide gas. A metal chemical catalyst, preferably comprised particularly of iron and other...
4435371 Sulfur removal from a gas stream  
There is disclosed a process for removing sulfur compounds from a gas stream. The process involves passing the gas stream containing the sulfur compounds through a mass of porous material that has...
4412981 Conversion of hydrogen sulfide to sulfur by direct oxidation  
In a process wherein hydrogen sulfide is converted to elemental sulfur in the presence of oxygen, an improvement is made by employing an alcoholic solution of an alkali metal hydroxide, free of...
4368178 Process for the removal of H.sub.2 S and CO.sub.2 from gaseous streams  
A cyclic process for the simultaneous removal of hydrogen sulfide and carbon dioxide from a variety of gas streams is disclosed. The gas stream containing the sour gases is contacted with a...
4363790 Desulfurization of H.sub.2 S containing gas streams with production of elemental sulfur  
A process is disclosed for desulfurization of gas streams by which reduced sulfur compound, such as H 2 S, is reacted with solid sulfur removal metal oxide compound which is an oxide of chromium,...
4361487 Control of hydrogen sulfide emission from geothermal steam plants with hydrogen peroxide and sodium vanadate  
Removing hydrogen sulfide from geothermal steam condensate is described whereby the hydrogen sulfide that is present in the condensate from a geothermal steam plant is oxidized with a peroxygen...
4330522 Acid gas separation  
Acid gases are separated from gaseous streams by the use of absorbents having the formula ##STR1## wherein R 1 , R 2 , and R 3 are alkyl containing 1 through 4 carbon atoms.
4302434 Process for producing hydrogen and sulphur from hydrogen sulphide  
A process is provided for the production of hydrogen and sulphur from a gas containing hydrogen sulphide. Such a process comprises passing the gas through a cracking zone at a temperature of from...
4246244 Process for scavenging hydrogen sulfide from hydrocarbon gases  
A process for scavenging hydrogen sulfide from hydrocarbon gases utilizes iron oxide particles of unique chemical and physical properties. These particles have large surface area, and are comprised...
4053574 Gas desulfurization process  
Hydrogen sulfide is removed from a gaseous mixture by reaction with tellurium dioxide. After the reaction, the resulting tellurium can be reoxidized.
4041142 Method for removing sulfur oxide from waste gases and recovering elemental sulfur  
A continuous catalytic fused salt extraction process is described for removing sulfur oxides from gaseous streams. The gaseous stream is contacted with a molten potassium sulfate salt mixture...
3972988 Sulfur production  
A process is disclosed for the production of sulfur which comprises the oxidation of a sulfide solution in the presence of a catalyst comprising a metal phthalocyanine compound to produce sulfur...
3956473 Process for oxidizing hydrogen sulfide to sulfur by means of molecular oxygen in the presence of transition metal complexes as catalysts  
Catalytic oxidation of hydrogen sulfide to sulfur in homogeneous liquid phase, by means of molecular oxygen, in an organic solvent whose water content is lower than 60% by volume, said liquid phase...
3954938 Removal of hydrogen sulfide from reducing gases  
Hot reducing gases are cleaned of sulfur compounds without requiring cooling. A melt of molten lead and metal sulfide is contacted with the hot reducing gases to remove sulfur compounds such as...
3937795 Desulfurizing process for hydrogen sulfide-containing gases  
A process is disclosed for the desulfurization of gases containing hydrogen sulfide, as well as their decyanization and removal of sulfurous acid when the gases contain hydrogen cyanide or...
3933608 Method for the decomposition of hydrogen sulfide  
Hydrogen sulfide is decomposed to elemental sulfur in an electrical discharge. In one embodiment of the invention the H 2 S decomposition rate is substantially increased when the decomposition is...
3923966 Direct manufacture of hydrogen peroxide from hydrogen sulfide  
Hydrogen sulfide is reacted with an anthraquinone in an organic solvent and in the presence of an amine catalyst; the elemental sulfur thus produced is separated from the resulting...
3917795 Method of treating coal refuse  
The present invention relates to a method of treating coal refuse containing pyrites and ash to produce usable products therefrom. The coal refuse is mixed with lime or limestone, formed into...
3914399 Elemental sulfur produced by wet oxidation of hydrogen sulfide  
H 2 S and air are bubbled through a mixture of alcohol, e.g., methanol/amine e.g., isopropylamine/oxygen-carrier catechol to produce elemental sulfur which can settle to the bottom of the liquid...
3856925 METHOD FOR MANUFACTURE OF HYDROGEN AND CARBONYL SULFIDE FROM HYDROGEN SULFIDE AND CARBON MONOXIDE  
Hydrogen is produced from hydrogen sulfide by using, as a catalyst, the sulfide of a metal selected from the class consisting of transition metals of Group V such as vanadium, of Group IV such as...
3761569 METHOD OF REMOVING HYDROGEN SULFIDE FROM GASES  
A method for removing hydrogen sulfide from a gas stream involves passing the hydrogen sulfide-containing gas through a solution of cupric ions in a strong acid in the presence of oxygen.
3728440 CONTINUOUS PROCESS FOR SCRUBBING HYDROGEN SULFIDE FROM A GAS STREAM AND SELECTIVELY PRODUCING ELEMENTAL SULFUR WHILE MINIMIZING THIOSULFATE MAKE  
H 2 S is removed from a gas stream and sulfur is selectively produced by the steps of: (1) sequentially scrubbing the gas stream with a first recycle water stream containing NH 4 OH and then with...
3728441 REMOVAL AND RECOVERY OF SULFUR FROM A GAS STREAM CONTAINING HYDROGEN SULFIDE  
H 2 S is removed from a gas stream and sulfur is produced by the steps of: (1) sequentially scrubbing the gas stream with a first recycle water stream containing NH 4 OH and then with a second...
3649197 PREPARATION OF ALKYL HALIDES AND SULFUR FROM HYDROGEN SULFIDE, ALCOHOLS AND HALIDES  
Alkyl halides and sulfur are formed and recovered by reacting hydrogen sulfide, bromine or iodine and ethyl or methyl alcohol in the presence of an acid and an alkali metal halide.
3639265 METHANE FOR REGENERATING ACTIVATED CARBON  
In a process where sulfur oxides have been removed from gas streams by adsorption onto activated carbon in the form of sulfuric acid, regeneration of the sulfuric acid laden activated carbon is...
3632314 REGENERATION OF SULFURIC ACID LADEN ACTIVATED CARBON  
A two-stage process for regenerating sulfuric acid laden activated carbon by contacting at a temperature below about 350° F. the activated carbon with hydrogen sulfide in an amount of at least 3:1...
3516793 PROCESS FOR PURIFYING SULFIDE CONTAINING GASES AND THE RECOVERY OF SULFUR THEREFROM  
3388057 Method for the reduction of the hydrogen sulfide content of digestion gas  
3366452 Process for preparing carbon monoxide, carbon disulfide, sulfur, ethylene and acetylene from well gas  
3250697 Sweetening process using ammonia as catalyst  
3154383 Process employing molecular sieve material for the production of free sulphur from afluid containing hydrogen sulfide  
Matches 151 - 200 out of 214 < 1 2 3 4 5 >