Class 423/543 - Burning sulfur

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes including the step of causing the element sulfur
No. of patents: 35
Last issue date: 10/25/2011

Number	Title	Issue Date
8043597	Process and apparatus for the combustion of sulfur A process for a combustion of sulfur with an oxygen-containing gas to produce sulfur dioxide. The process includes introducing the sulfur and the oxygen-containing gas to a furnace. The sulfur is evaporated and subsequently a portion of the sulfur is oxidized to sul...	10/25/2011
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
7192517	Coal-bed-methane water treatment system A water treatment system for treating coal-bed-methane (CBM) water. The CBM water treatment system includes a pump system for pumping CBM water from one or many CBM wells into a common reservoir and a solid-based sulfurous generator that produces aqueous sulfurous a...	03/20/2007
7182919	Sulphurous acid generator with air injector This invention presents a sulphurous acid generator which employs a combination of novel blending contact and mixing mechanisms which maximize the efficiency and duration of contact between sulphur dioxide gas and water to form sulphurous acid in an open nonpressuri...	02/27/2007
7141220	Open system sulphurous acid generator This invention presents a sulphurous acid generator which employs a combination of novel blending, contact and mixing mechanisms which maximize the efficiency and duration of contact between sulphur dioxide gas and water to form sulphurous acid in an open nonpressur...	11/28/2006
7052670	Method for the automated manufacture of pure SO2 from sulfur and oxygen A method for the automated production of liquid SO2 having a purity above 99.9% from elemental sulfur and pure oxygen, in the presence of SO2 recirculated from a closed circuit production system. The temperature of the combustion is controlled ...	05/30/2006
6893622	Process for the combustion of sulphur for the preparation of oleum and sulphuric acid with reduced (NO)x content The invention relates to a process for the continuous preparation of oleum of a concentration of 10 to 45% by weight of SO3 and/or sulphuric acid of a concentration of 94 to 100% by weight of H2SO4 by combustion of sulphur with atmos...	05/17/2005
6875413	Sulfur dioxide plant Production of sulfur dioxide by means of the combustion of sulfur and pure oxygen in a closed system that produces a high yield in the recovery of SO2 and reduces environmental contamination to levels below the standard requirements. Sulfur dioxide is pro...	04/05/2005
6572835	Method and apparatus for producing gaseous sulfur trioxide An apparatus and method for producing sulfur comprises a vessel containing a plurality of spaced-apart channels each having an upstream end communicating with an upstream manifold and a downstream end communicating with a downstream manifold. Each channel...	06/03/2003
6045770	Sulfur dioxide generation using granulated or emulsoid sulfur feedstock A flue gas conditioning system (FGC) for conditioning the flue gas flowing in a flue from a boiler to an electrostatic precipitator by injecting sulfur trioxide into the flue gas upstream of the electrostatic precipitator. The FGC has a source (52) of gra...	04/04/2000
5834390	Copper-substituted, lithium zirconate-based ceramic usable as a tritium producing material The invention relates to ceramic materials usable as tritium producing material in a thermonuclear fusion reactor. These materials are constituted by lithium zirconate substituted by copper in the form of solid solutions of the type Li2 ZrO	11/10/1998
5807530	Process for burning of sulfur In the manufacture of sulfuric acid, elemental sulfur is reacted to by finely atomizing liquid sulfur into a vortex of combustion air and returning the atomized sulfur in the vortex during combustion, the ratio of air and sulfur supplied to the vortex bei...	09/15/1998
5389354	Process for the production of oleum and sulfuric acid In the continuous production of oleum having a concentration of 10 to 45% by weight SO3 and/or sulfuric acid having a concentration of 94 to 100% by weight H2 SO4 by burning sulfur with atomospheric oxygen on the principle...	02/14/1995
5326549	Composite metal hydroxide and process for the production thereof A composite metal hydroxide which overcomes the instability and coarse crystal formation of calcium hydroxide and can be used in fields where calcium hydroxide conventionally cannot be used, e.g., as an agent for neutralizing or inactivating acids or halo...	07/05/1994
5204082	Sulfur dioxide generation by submerged combustion and reduced thermal cycling by use of a hot recycle of sulfur A method of making high purity sulfur dioxide by submerged combustion is disclosed. Sulfur is combusted in a first liquid pool with an oxygen-containing gas and the vapor effluent is removed and cooled in a first cooling zone to a temperature above approx...	04/20/1993
5194239	Oxygen-based noncatalytic sulfuric acid process A noncatalytic process for producing sulfur trioxide and sulfuric acid in which sulfur is combusted with an oxygen-rich gas in the presence of recycled sulfur dioxide-rich gas to form sulfur trioxide which is absorbed in sulfuric acid and yield a sulfur d...	03/16/1993
4966757	Sulfur dioxide generator An improved apparatus for burning sulfur to sulfur dioxide and generating sulfurous acid comprising a primary sulfur-burning chamber, a sulfur feed tank closely coupled to the primary chamber, a secondary sulfur burning chamber, and an absorption tower, A...	10/30/1990
4937058	Catalytic oxidation of sulfur compounds Sulfur containing organics, e.g., carbon disulfide carbon oxysulfide, or a mercaptan, are oxidized to sulfur dioxide in gaseopus phase, whether alone or conjointly with hydrogen sulfide and/or elemental sulfur, per se, by passing a gaseous stream thereof,...	06/26/1990
4855124	Process for the desulfurization of gas containing hydrogen sulfide It has been believed that the Claus reaction in water without additive gives no more than very low conversion and some additive such as buffer or catalyst must be used to attain satisfactory H2 S conversion. However, it was discovered that when H	08/08/1989
4578262	Liquid sulphur dioxide manufacture Process for the production of liquid sulphur dioxide in a sulphur dioxide facility forming part of a sulphuric acid plant wherein a portion of the sulphur dioxide produced in a sulphur burning furnace is directed to a sulphur dioxide liquefaction means an...	03/25/1986
4526771	Sulfurous acid generator A highly efficient apparatus for burning sulfur to sulfur dioxide and generating sulfurous acid comprises a primary sulfur-burning chamber, a sulfur feed tank closely coupled to the primary chamber, a secondary sulfur-burning chamber, and an absorption to...	07/02/1985
4421734	Sulfuric acid-sulfur heat storage cycle A method of storing heat is provided utilizing a chemical cycle which interconverts sulfuric acid and sulfur. The method can be used to levelize the energy obtained from intermittent heat sources, such as solar collectors. Dilute sulfuric acid is concentr...	12/20/1983
4328194	Nitrogen oxide removal process A process for the selective reduction of nitrogen oxide in a combustion effluent gas stream is disclosed wherein the gas stream is contacted with sulfur at a temperature of about 445° C. to 2000° C., therein converting the NO to N2 and the su...	05/04/1982
4266512	Apparatus for the vaporization of elemental sulfur by means of carrier gas An apparatus for the vaporization of elemental sulfur by means of carrier gas, the apparatus comprising a first thermally insulated vessel for the melting of elemental sulfur, provided with a heating means, a stirrer and an inlet pipe for elemental sulfur...	05/12/1981
4267162	Process and apparatus for the exploitation of the sulfur compounds contained in gases containing oxygen and a high water vapor content Sulfur compounds contained in gases containing oxygen and a high content of water vapor are exploited by removing the water vapor content by treating the gases with a glycol and then using the dried gas still containing sulfur compounds, as an oxidation g...	05/12/1981
4235605	Synthesizing gas from coal via synergetic reactions with steam and sulfur Gasification by reaction of carbon (e.g., in coal) with sulfur in the presence of steam, at 500°-1500° K., and controlled to favor production of carbon monoxide/-dioxide and hydrogen sulfide (further reactable to hydrogen and sulfur, which can be recycl...	11/25/1980
4163043	Process for removing H₂ S and CO₂ from gases and regenerating the adsorbing solution H2 S and CO2 from a waste gas are absorbed in an ammoniacal or alkali metal hydroxide solution. The resultant sodium, potassium or ammonium sulfide solution is reacted with pulverized copper oxide and the resultant copper sulfide pre...	07/31/1979
4053573	Recovery of sulfur values from spent sulfuric acid Improvement in the method for recovering sulfur values in the form of sulfur dioxide from spent sulfuric acid by decomposing the spent sulfuric acid at elevated temperature in the presence of elemental sulfur to generate a sulfur dioxide-containing gas st...	10/11/1977
4046867	Method for making sulfur dioxide-containing gas stream Improvement in the method for making a sulfur dioxide-containing gas stream of low elemental sulfur content by contacting a stream of oxygen-containing gas with elemental sulfur maintained above its auto-ignition temperature to generate a gas stream conta...	09/06/1977
4046866	Production of liquid sulfur trioxide A process for production of liquid sulfur trioxide in which sulfur is combusted with oxygen in one stage at a furnace outlet temperature of between about 1000° F and about 2700° F, and the resulting sulfur dioxide-containing gas is subjected to multista...	09/06/1977
4043822	Treatment of water-soluble metal sulfate residues Process for transforming water-soluble metal sulfate residue obtained from spent sulfuric acid containing inorganic impurities, such as pickle liquors or acid wastes from hydrometallurgical processes, into substantially water-insoluble form suitable for d...	08/23/1977
4039289	Sulphur-burning and gaseous products absorption system and components therefor A sulphur-burning and gaseous products absorption system incorporating control means to establish generation of sulphur dioxide at a rate which is compatible with the capacity of absorption means for absorption of the gases by water, together with control...	08/02/1977
4010246	Process for preparing sulfur dioxide Finely divided sulfur and an oxygen containing gas are combined and burnt. Finely divided sulfuric acid is introduced into the hot flame gases. The resulting gas containing SO2, water and oxygen can be processed to pure SO2....	03/01/1977
3988428	Sulfur-producing process and system for producing sulfur dioxide Sulfur dioxide is formed by the combustion of elemental sulfur in two distinct stages wherein oxygen-containing gas in a quantity which is initially less than that stoichiometrically required for total combustion of the sulfur to sulfur dioxide and the su...	10/26/1976
3985529	Method for the production of liquid sulphur dioxide The method of recovering liquid sulphur dioxide from gases containing sulphur dioxide by washing with water in an absorption plant and then stripping off absorbed sulphur dioxide at subatmospheric pressure. Water is removed from the stripped gasesby cooli...	10/12/1976

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Class 423/543 - Burning sulfur