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9005566 Staged combustion of sulfureous combustible effluents with recovery of the sulfur in the claus process  
A process for advantageously efficiently treating a sulfureous combustible effluent stream by recovering the sulfur in elemental form comprises a step of combustion of the sulfureous combustible...
8764965 Electrochemical conversion of alkali sulfate into useful chemical products  
Electrochemical processes to convert alkali sulfates into useful chemical products, such as syngas, alkali hydroxide, and sulfur are disclosed. An alkali sulfate is reacted with carbon to form...
8597581 System for maintaining flame stability and temperature in a Claus thermal reactor  
A system may include a sulfur recovery unit. The sulfur recovery unit may include an acid gas supply, which may supply acid gas, an oxygen supply, which may supply oxygen, a fuel supply, which may...
8580208 Reactor and method for production of hydrogen sulphide  
The present invention describes a reactor (1) for continuously preparing hydrogen sulfide H2S from hydrogen and sulfur, comprising a distributor device (15) for distributing gaseous hydrogen in a...
8562928 Process for producing hydrogen, sulfur and sulfur dioxide from hydrogen sulfide-containing gas streams  
A process for making molecular hydrogen, elemental sulfur and sulfur dioxide from hydrogen sulfide. The process involves contacting a gas stream of hydrogen sulfide within a contacting zone with a...
8137634 Fission reactor for a Claus plant  
The invention relates to a fission reactor (1) for a Claus plant, comprising a fireproof lined boiler (9), which contains a combustion chamber (2) with an influx opening for a mixture of fuel gas,...
7678354 Integrated lime kiln process  
A process and system for recovering waste heat from a kiln used for lime or cement production. The system unifies the kiln, a waste heat recovery and power generation circuit and a dry scrubber...
7635460 Process for dissolving sulfur ore using diaryl disulfide  
Embodiments of a sulfur extraction process comprise treating mined sulfur ore with a disulfide oil to dissolve the sulfur in the ore. The process occurs at a temperature less than a temperature...
7604785 Process for the recovery of elemental sulphur from residues produced in hydrometallurgical processes  
The present invention relates to a process for the recovery of elemental sulphur from residues produced in hydrometallurgical processes based on leaching with a solution of sodium sulphide in...
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...
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...
6096280 Natural gas treatment process  
Hydrogen sulfide is removed from gas streams by reaction with sulfur dioxide in an autogeneously-formed aqueous acid medium according to the equation: SO2 +2H2 S➝2H2 O+3S the sulfur being removed...
5972302 Method for the microwave induced oxidation of pyritic ores without the production of sulphur dioxide  
Pyritic ores are heated with microwave energy in a fluidized bed to a temperature in the range of approximately 573 degrees Kelvin to 823 degrees Kelvin with a controlled amount of oxygen to...
5733516 Process for removal of hydrogen sulfide from a gas stream  
A process and system for removing hydrogen sulfide from a gaseous stream such as one of natural gas. A sour gas stream containing H2 S is contacted with a nonaqueous, water-insoluble sorbing...
5686056 Methods and apparatus for purifying hydrogen sulfide  
The invention provides methods for purifying hydrogen sulfide gas having impurities therein. In one exemplary method, the hydrogen sulfide gas is purified by passing the gas through a filter...
5618507 Process for removing SO2 from gases which contain it, with direct production of elemental sulfur  
A wet process of regenerative type for removing SO2 contained in combustion gases in which SO2 is caused to be absorbed by a diluted aqueous solution of BaS, with a mixed precipitate of elemental...
5609845 Catalytic production of hydrogen from hydrogen sulfide and carbon monoxide  
There is provided a process for the catalytic production of hydrogen from the reaction of hydrogen sulfide and carbon monoxide with the elimination of the carbonyl sulfide and/or sulfur dioxide...
5316751 Methods for mine tailing clean-up using recovery technologies  
A method for site remediation for mitigating contamination from metals or metal compounds, particularly resulting from the situation of mine tailing waste on or near water sources, including the...
5236677 Biological process for the elimination of sulphur compounds present in gas mixtures  
A continuous process for the microbiological conversion and removal of malodorous sulphur-containing organic and inorganic compounds from a gaseous stream, comprising the steps of providing a...
5167834 Process for treating nitrite-and sulfide-containing water to reduce nitrogen oxide and hydrogen sulfide emissions therefrom  
A process for abating the emission of hydrogen sulfide and nitrogen oxide from a condensate of steam, derived from a sulfide- and nitrite-containing geothermal brine, comprising introducing an...
5114700 Electrically heated fluidized bed reactor and processes employing same  
A method of carrying out a chemical reaction in a fluidized bed reactor is provided wherein the reactants include at least one finely sub-divided reactant having a particle size substantially...
5066470 Cyclic process for the removal of sulfur dioxide and the recovery of sulfur from gases  
In accordance with the invention, gases containing sulfur dioxide are passed through a solution rich in ferric iron and containing barium chloride or calcium chloride. Sulfur dioxide is oxidized...
5030437 Catalytic removal of sulphur-containing compounds from fluid streams by decomposition  
This invention provides a catalyst and method for removing sulphur compounds from a fluid stream and decomposing such compounds to produce sulphur. Sour natural gas can be sweetened effectively by...
4999178 Thermochemical cycle for splitting hydrogen sulfide  
A thermochemical cycle for the recovery of hydrogen and sulfur by splitting hydrogen sulfide, based upon initial reactions between the hydrogen sulfide and carbon dioxide or carbon monoxide. The...
4861577 Method for removing the sulphur content of a weak gas containing sulfur dioxide  
The invention relates to a method for cleaning exhaust gases weak in sulphur dioxide, or sulphur dioxide and hydrogen sulphide. In order to remove the sulphur content of an exhaust gas, the...
4770864 Process for removing NH3 in an SO2 -containing gas  
An SO2 -containing gas, in particular, pre-stage gas for the Claus reaction to recover sulfur can effectively be purified by removing NH3 contained therein using a TiO2 catalyst.
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...
4729835 Process for waste treatment  
Organic sulphides are extremely malodorous compounds that are found in gaseous or aqueous effluents from many industries such as paper and pulp manufacture, hydrocarbon refinering, tanneries, and...
4726937 Recovery of nickel chloride and sulfur from waste products  
Waste containing sulfur and nickel sulfide is heated to volatilize sulfur and reacted with hydrogen chloride to form nickel chloride.
4722799 Natural gas desulphurizing apparatus and method  
A desulphurization apparatus and method for natural gas in which red iron oxide is reacted with the sulphur compounds found in natural gas to remove these compounds from the gas. The treating...
4722832 Sulfur recovery process  
A process for the recovery of sulfur from sulfur-bearing ores employing an aqueous leaching solution containing calcium monosulfide, calcium hydrosulfide or mixtures of such calcium sulfide...
4702893 Acid air pollution precipitators  
An apparatus is provided for the elimination of the gaseous pollutants sulfur dioxide and nitric oxide from the emissions of furnaces and smelters, and for the production of two commercial...
4666695 Settling of sulfur in sulfide removal process  
For the removal of sulfur compounds, especially H2 S, from gaseous mixtures, said mixtures are scrubbed with a physical solvent which is later regenerated and reused. To the solvent are added (a)...
4609541 Method of processing coal gas  
An improved method for the recovery of elemental sulfur(S) from a coal-gas containing hydrogen sulfide (H2 S) wherein hot lime (CaO) is used and then regenerated according to the following...
4543434 Process for producing liquid hydrocarbon fuels  
A process for the synthesis of liquid hydrocarbon fuels and hydrogen based on the use of sulfur as an oxidant.
4508693 Solution removal of HCN from gaseous streams, with pH adjustment of reacted solution and hydrolysis of thiocyanate formed  
A process for the removal of HCN from gaseous streams is described, the process being characterized by reaction of the HCN in the gaseous stream with an ammonium polysulfide solution and formation...
4505881 Ammonium polysulfide removal of HCN from gaseous streams, with subsequent production of NH3, H2 S, and CO2  
A process for the removal of HCN from gaseous streams is described, the process being characterized by reaction of the HCN in the gaseous stream with an ammonium polysulfide solution, formation of...
4481181 Hydrogen production from in situ partial burning of H2 S  
Hydrogen is produced from hydrogen sulfide by coupling, in a single reaction zone, the partial oxidation of hydrogen sulfide to water and sulfur with the thermal decomposition of hydrogen sulfide...
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...
4447276 Molecular beam epitaxy electrolytic dopant source  
A method of growing crystalline semiconductors such as GaAs is disclosed. The method involves epitaxial deposition from the vapor phase and provides dopant material such as sulphur in the form of...
4444736 Process for removing SO2 and NOx from gases  
A process for removing SO2 and NOx from waste gas and recovering sulfur comprising scrubbing the waste gases with a water slurry of FeS in the presence of FeSO4 and Na2 SO4. SO2 is captured by the...
4432962 Method for removing hydrogen sulfide from gas streams  
A hydrogen sulfide removal and conversion method in which a hydrogen sulfide-containing gas stream is contacted with a regenerable washing solution having a pH between about 5 and about 10 and...
4431613 Leaching of sulphidic mattes containing non-ferrous metals and iron  
A method of treating sulphidic mattes containing from 5% to 60% iron; from 15% to 40% sulphur together with soluble non-ferrous metals such as copper, cobalt, nickel and zinc and also optionally...
4418014 Process for the manufacture of sulphur which can be recycled  
The process for recovering recyclable sulphur from a strongly colored solution obtained from the production of sulphur dyestuffs containing alkali metal sulfides, alkali metal polysulfides,...
4389247 Metal recovery process  
A process for recovering a metal in its elemental state from an oxide or salt of the metal comprising passing the metal oxide or salt and a reducing gas concurrently downward through a packed bed...
4386061 Method of treating pyrite bearing polymetallic material  
A method of treating pyrite bearing polymetallic material comprises heating the material in an atmosphere of reducing gases at a temperature of 450° to 500° C. for a period of 30 to 60 min.Gases...
4383983 Method for the removal of carbon or carbon compounds from a waste stream  
A method for the removal of carbon or carbon compounds from a waste stream generated in an unsupported slurry catalyst process utilized for the hydroconversion of heavy hydrocarbonaceous black oil...
4382011 Composition of matter useful in flue gas desulfurization process  
Flue gas having a content of sulfur dioxide is passed upwardly through a scrubbing tower against a descending flow of recycled aqueous sodium aluminate-sodium hydroxide liquor. The sulfur dioxide...
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...
4358427 Removal of hydrogen sulfide from geothermal steam  
A process for removing hydrogen sulfide from geothermal steam comprising adding free oxygen to the steam and contacting the steam with an oxidation catalyst at a pressure of at least 30 psig and a...

Matches 1 - 50 out of 164 1 2 3 4 >