Phenolate Or Phenolic Type Patents (Class 423/227)
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Patent number: 8906135Abstract: A method for separating a target gas from a gaseous mixture using 1,2,3-triazolium ionic liquids is presented. Industrial effluent streams may be cleaned by removing carbon dioxide from the stream by contacting the effluent stream with a 1,2,3-triazolium ionic liquid compound.Type: GrantFiled: September 1, 2011Date of Patent: December 9, 2014Assignee: U.S. Department of EnergyInventors: David Luebke, Hunald Nulwala, Chau Tang
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Patent number: 8652237Abstract: A system and process are disclosed for selective removal and recovery of H2S from a gaseous volume, e.g., from natural gas. Anhydrous organic, sorbents chemically capture H2S gas to form hydrosulfide salts. Regeneration of the capture solvent involves addition of an anti-solvent that releases the captured H2S gas from the capture sorbent. The capture sorbent and anti-solvent are reactivated for reuse, e.g., by simple distillation.Type: GrantFiled: December 17, 2010Date of Patent: February 18, 2014Assignee: Battelle Memorial InstituteInventors: David J. Heldebrant, Phillip K. Koech, James E. Rainbolt, Mark D. Bearden, Feng Zheng
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Publication number: 20110223084Abstract: This invention relates to sulfur functionalized ionic liquid compounds that are useful in methods of carbon dioxide or sulfur dioxide removal to which they may be applied.Type: ApplicationFiled: March 10, 2011Publication date: September 15, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: MARK A. SCIALDONE
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Patent number: 5096690Abstract: A method and apparatus for manufacturing silver halide grains wherein a water-soluble silver salt solution and a water-soluble halide solution are separately introduced within a hollow cylindrical structure open at each end which is rotatable mounted about its longitudinal axis within a reaction vessel containing a colloidal aqueous solution. The colloidal aqueous solution within the cylindrical structure is stirred and mixed during the addition of the silver salt solution and halide solution and the silver halide grains which form within the cylindrical structure are immediately discharged into the colloidal aqueous solution between the outer circumference of the cylindrical structure and the reaction vessel through slits in the circumference of the cylindrical structure.Type: GrantFiled: May 22, 1987Date of Patent: March 17, 1992Assignee: Fuji Photo Film Co., Ltd.Inventor: Hirokazu Saito
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Patent number: 5026503Abstract: An improved aqueous catalytic oxidation-reduction composition for oxidizing hydrogen sulfide to produce elemental sulfur and a method of removing hydrogen sulfide from a gas stream whereby a gas stream containing hydrogen sulfide is brought into contact with an aqueous catalytic oxidizing reaction composition containing a water soluble polyvalent metal salt having metal in the highest valence state and at least one nonionic surfactant having an HLB of from about 8 to about 10, preferably about 8.5 to about 9, which is adapted to wet the elemental sulfur formed. The nonionic surfactant is present in the reaction solution in an amount sufficient to substantially prevent formation of sulfur froth at the surface of the reaction solution and to cause the sulfur to precipitate as a granular solid that can be recovered by filtration, by centrifucation, or other similar means.Type: GrantFiled: July 21, 1989Date of Patent: June 25, 1991Assignee: Amoco CorporationInventor: Robert C. Stewart
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Patent number: 4859437Abstract: The present invention relates to a cyclic continuous process and a composition for the removal of hydrogen sulfide from a variety of sour gas streams. The sour gas stream is contacted with an aqueous solution of a water-soluble organic polymeric chelate containing an oxidizing polyvalent metal, e.g., Fe(III). The sulfur in the hydrogen sulfide is converted to elemental sulfur and the iron in the polymeric chelate is reduced. The process includes removal of the elemental sulfur, and an inexpensive method for removing water and excess low molecular weight materials, e.g., materials having molecular weights below 500, preferably using ultrafiltration or dialysis regeneration and recycle of the reactive polyvalent metal.Type: GrantFiled: March 10, 1986Date of Patent: August 22, 1989Assignee: The Dow Chemical CompanyInventor: Robert R. Grinstead
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Patent number: 4808385Abstract: The present invention relates to a cyclic continuous process and a composition for the removal of hydrogen sulfide from a variety of sour gas streams. The sour gas stream is contacted with an aqueous solution of a water-soluble organic polymeric chelate containing an oxidizing polyvalent metal, e.g., Fe(III). The sulfur in the hydrogen sulfide is converted to elemental sulfur and the iron in the polymeric chelate is reduced. The process includes removal of the elemental sulfur, and an inexpensive method for removing water and excess low molecular weight materials, e.g., materials having molecular weights below 500, preferably using ultrafiltration or dialysis, regeneration and recycle of the reactive polyvalent metal.Type: GrantFiled: February 18, 1987Date of Patent: February 28, 1989Assignee: The Dow Chemical CompanyInventor: Robert R. Grinstead
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Patent number: 4206194Abstract: A process for treating a hydrogen sulfide-containing hydrogenated Claus process tail gas to convert the hydrogen sulfide to elemental sulfur in which said gas is contacted with an aqueous alkaline solution containing a water-soluble metal vanadate, a water-soluble anthraquinone disulfonate, and a water-soluble phenolic complexing agent or a water-soluble carboxylic complexing agent, to yield an effluent gas of reduced sulfur content. The solution is thereafter regenerated by contact with an oxygen-containing gas, elemental sulfur is recovered from the solution, and the regenerated solution is recycled to the gas-contacting step. The complexing agent contained in the solution reduces the chemical consumption of the anthraquinone disulfonate.Type: GrantFiled: September 24, 1976Date of Patent: June 3, 1980Assignee: Union Oil Company of CaliforniaInventors: Donald M. Fenton, Raoul P. Vaell
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Patent number: 3962404Abstract: A process for regenerating absorbent solutions used for removing gaseous impurities such as CO.sub.2, H.sub.2 S,HCN, SO.sub.2 and other acidic gases from gaseous mixtures by stripping with steam, which comprisesA. dividing the solution to be regenerated into a principal and a secondary fraction (p and s) and regenerating these fractions separately from each other in a principal and a secondary regeneration column (P and S), the principal regeneration column being operated at a pressure of at least about 0.2 to 0.5 atm above the pressure of the secondary regeneration column,B. regenerating the principal fraction in the principal regeneration column by heat which is fed from outside into the lower part of the column,C. regenerating the secondary fraction in the secondary regeneration column by heat which has been removed from the regenerated solution leaving the principal regeneration column andD. passing the regenerated fractions to the absorber.Type: GrantFiled: February 19, 1974Date of Patent: June 8, 1976Inventors: Giuseppe Giammarco, Paolo Giammarco
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Patent number: 3935294Abstract: This invention comprises a method for the separation of one component or more from a vapor or gas mixture which involves the step of reacting the component to form a complex or thermally decomposible molecule by reaction with a compound adsorbed or otherwise deposited on a solid carrier. Typical of the gas components that can be so removed, and recovered if desired are carbon dioxide, oxygen, nitrogen oxide, carbon monoxide, sulfur dioxide, silicon tetrafluoride, hydrogen sulfide, aromatic hydrocarbons, mercaptans, HCN, HF, HCl, BF.sub.3 and HBr. Compounds which are adsorbed on the solid carrier for reaction with these various components include various carbonates, such as K, Na, Li, Ca, Cd, Ba; various sulfites, such as K, Na, Li, Cd and Ag; fluorides, glyoximes, ferrous and cupric salts, cuprous amine complexes, dioxane, urea, phosphates, chlorinated aromatics, organic nitriles, benzaldehyde, quinols, etc.Type: GrantFiled: June 14, 1974Date of Patent: January 27, 1976Assignee: Teller Environmental Systems, Inc.Inventor: Aaron J. Teller