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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,...
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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 for...
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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...
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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 which...
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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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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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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 f...
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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...
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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 liquor...
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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 media,...
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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...
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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...
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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...
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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...
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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...
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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...
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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 by...
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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...
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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...
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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 exhaust...
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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.
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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...
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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...
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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.
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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...
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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...
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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...
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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)...
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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...
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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.
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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...
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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...
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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...
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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...
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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 a...
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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...
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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...
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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...
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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, sulphur...
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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...
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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 s...
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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...
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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...
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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...
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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...
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4324776 |
Mid-temperature H2 S removal process
H2 S is removed from a stream of gas such as coal gas at a relatively elevated temperature (300°-400° F.) in a process which employs sulfates or hydroxides of nickel, iron, or zinc as sulfur a...
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4311680 |
Method for removal of sulfur compounds from a gas stream
This invention relates to a process for the removal of sulfur compounds from a gas stream. More specifically, this invention relates to an improvement in the iron oxide method of sulfur removal...
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4308242 |
Producing sulfur-containing compositions from gaseous sulfur compounds
At least one of sulfur dioxide and a gaseous hydrosulfide is contacted with at least one of a sulfur-containing salt and a gaseous basic nitrogen compound to produce a solid, sulfur-containing...
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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...
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4300949 |
Method for treating sulfide raw materials
The present invention relates to the field of non-ferrous metallurgy and more specifically to methods for treating sulfide raw materials.The method comprises an autogenous smelting of the raw...
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