Patents by Inventor Stephen E. Jacobson
Stephen E. Jacobson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6667421Abstract: This invention relates to a process for the production of an aryl thiol, which comprises hydrogenating an aryl sulfonyl chloride in a solvent in the presence of a palladium catalyst and a base whose conjugate acid has a pKa of about 2 or greater, wherein the base is selected from the group consisting of ionic bases soluble in water and tertiary amines soluble in the solvent, the tertiary amines not having a methyl group attached to the amine nitrogen.Type: GrantFiled: August 28, 2002Date of Patent: December 23, 2003Assignee: E. I. du Pont de Nemours and CompanyInventor: Stephen E. Jacobson
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Publication number: 20030055290Abstract: This invention relates to a process for the production of an aryl thiol, which comprises hydrogenating an aryl sulfonyl chloride in a solvent in the presence of a palladium catalyst and a base whose conjugate acid has a pKa of about 2 or greater, wherein the base is selected from the group consisting of ionic bases soluble in water and tertiary amines soluble in the solvent, the tertiary amines not having a methyl group attached to the amine nitrogen.Type: ApplicationFiled: August 28, 2002Publication date: March 20, 2003Inventor: Stephen E Jacobson
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Patent number: 5591890Abstract: A process for preparing o-nitroaromatic acids by direct oxidation of the corresponding o-nitroalkylaromatic compounds, utilizing salts of certain catalytic metals in the presence of an oxygen-containing gas and an aliphatic aldehyde or ketone at elevated temperature and pressure, is provided. The process allows catalyst recovery and reuse.Type: GrantFiled: November 3, 1995Date of Patent: January 7, 1997Assignee: E. I. Du Pont de Nemours and CompanyInventor: Stephen E. Jacobson
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Patent number: 5434308Abstract: A method of dehydrogenating 3-amino-2-cyclohexene-1-one with a supported palladium or palladium-platinum catalyst in a solvent in the presence of base to produce 3-aminophenol and its use directly without purification to produce 3,4'-oxydianiline.Type: GrantFiled: January 18, 1994Date of Patent: July 18, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventor: Stephen E. Jacobson
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Patent number: 5296640Abstract: A process for preparing perhaloacyl chlorides such as trifluoroacetyl chloride by oxidizing lower perfluoroalkyl and monochloroperfluoroalkyl dichloromethane within the supercritical region and in the absence of water.Type: GrantFiled: September 15, 1992Date of Patent: March 22, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventors: Stephen E. Jacobson, Wayne B. Ely
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Patent number: 5268508Abstract: A method of manufacturing 3-amino-2-cyclohexene-1-one by hydrogenating m-phenylenediamene to produce a novel intermediate salt of 3-amino-2-cyclohexene-1-imine followed by hydrolysis to produce 3-amino-2-cyclohexene-1-one. The novel intermediate 3-amino-2-cyclohexene-1-imine has also be isolated.Type: GrantFiled: August 17, 1992Date of Patent: December 7, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventor: Stephen E. Jacobson
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Patent number: 5241113Abstract: A process for preparing trifluoroacetyl chloride by reacting 1,1-dichloro-2,2,2-trifluoroethane with molecular oxygen over a carbon bed.Type: GrantFiled: September 15, 1992Date of Patent: August 31, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventor: Stephen E. Jacobson
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Patent number: 5202488Abstract: A method of dehydrogenating 3-amino-2-cyclohexene-1-one with a supported palladium or palladium-platinum catalyst in a solvent in the presence of base to produce 3-aminophenol and its use directly without purification to produce 3,4'-oxydianiline.Type: GrantFiled: April 15, 1991Date of Patent: April 13, 1993Assignee: E. I. du Pont de Nemours and CompanyInventor: Stephen E. Jacobson
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Patent number: 5149874Abstract: A method of manufacturing 3-amino-2-cyclohexene-1-one by hydrogenating m-phenylenediamene to produce a novel intermediate salt of 3-amino-2-cyclohexene-1-imine followed by hydrolysis to produce 3-amino-2-cyclohexene-1-one. The novel intermediate 3-amino-2-cyclohexene-1-imine has also be isolated.Type: GrantFiled: April 15, 1991Date of Patent: September 22, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventor: Stephen E. Jacobson
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Patent number: 4711772Abstract: Hydrogen peroxide is produced in a reaction between carbon monoxide, oxygen, and water in the substantial absence of gaseous hydrogen in the presence of a solvent using a soluble palladium compound as a catalyst and employing an arsine or phosphine ligand.Type: GrantFiled: September 18, 1986Date of Patent: December 8, 1987Assignee: The BOC Group, Inc.Inventor: Stephen E. Jacobson
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Patent number: 4608444Abstract: A process and accompanying catalyst for the hydroformylation of formaldehyde to glycol aldehyde is disclosed. The process features the utilization of (1) a class of transition metal phosphine-amide complexes, (2) a class of transition metal phosphine-amine complexes, and (3) mixtures of 1 and 2 as particularly suitable for use.Type: GrantFiled: March 1, 1985Date of Patent: August 26, 1986Assignee: The Halcon SD Group, Inc.Inventor: Stephen E. Jacobson
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Patent number: 4560806Abstract: An improved transition metal-phosphine-amide hydroformylation catalyst is disclosed having a substantially increased solubility in non-polar organic solvents, thereby preventing migration of the catalyst into the glycol aldehyde product during the hydroformylation process and subsequent separation operations, greatly facilitating and improving the catalyst separation and recycle operations.Type: GrantFiled: April 5, 1984Date of Patent: December 24, 1985Assignee: The Halcon SD Group, Inc.Inventor: Stephen E. Jacobson
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Patent number: 4496781Abstract: A process for the preparation and purification of a glycol aldehyde intermediate which is later hydrogenated to ethylene glycol is disclosed. The process proceeds via the catalytic reaction of formaldehyde, carbon monoxide and hydrogen and utilizes a novel class of lipophilic rhodium phosphine amide catalysts and an effective solvent mixture, which enables efficient catalyst separation and recycle without the loss of a substantial amount of the expensive catalyst.Type: GrantFiled: April 5, 1984Date of Patent: January 29, 1985Assignee: The Halcon SD Group, Inc.Inventors: Stephen E. Jacobson, Chun F. Chueh
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Patent number: 4483996Abstract: A process for converting a desired olefin to the corresponding olefin oxide, such as propylene oxide, and/or ketone comprising reacting a mixture of the olefin, thallic oxide, carbon dioxide and water in a substantially organic solvent-free reaction zone; withdrawing a product stream from the reaction zone, the stream comprising the olefin and ketone product; separating and collecting the olefin oxide and ketone product from the stream; contacting the reduced thallous values present in the mixture with molecular oxygen and an effective catalyst to back oxidize the thallous values to their original thallic form; separating and recycling back to the reaction mixture the regenerated thallic values.Type: GrantFiled: February 22, 1983Date of Patent: November 20, 1984Assignee: The Halcon SD Group, Inc.Inventor: Stephen E. Jacobson
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Patent number: 4483994Abstract: A process for the production of alkylene carbonates, such as propylene carbonate, is disclosed. The process involves reacting the desired olefin with a thallic oxide or a weak acid thallic salt with carbon dioxide in an aqueous, organic solvent containing, halogen-free system.Type: GrantFiled: February 22, 1983Date of Patent: November 20, 1984Assignee: The Halcon SD Group, Inc.Inventor: Stephen E. Jacobson
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Patent number: 4325874Abstract: A process for the preparation of alkylene carbonates, particularly ethylene carbonate, by the reaction of the corresponding olefins with carbon dioxide in the presence of iodine or an iodide compound and an oxide or a weak acid salt of thallium (III). The thallium is reduced to the T1(I) form which may be oxidized back to the T1(III) form for reuse. Gold(III) oxide is also effective.Type: GrantFiled: May 26, 1981Date of Patent: April 20, 1982Assignee: The Halcon SD Group, Inc.Inventor: Stephen E. Jacobson
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Patent number: 4286068Abstract: A process for oxidizing organic substrates such as ketones and ethylenically unsaturated compounds. The substrate is contacted with aqueous hydrogen peroxide in a solution or in a two-phase liquid system, in the presence of a polymeric catalyst containing chemically bonded arsenic. This process can lead to lactones or hydroxy acids from cyclic ketones or to esters or mixtures of alcohol and carboxylic acid from open chain ketones. Unsaturated compounds afford epoxides and/or diols. Preparations of certain polymers substituted by arsenic groups, particularly from polystyrene, poly(vinylpyridine) and copolymers thereof, useful as catalysts in such oxidation process, are described. For example, polystyrene is brominated, bromine therein is replaced by lithium and the resulting lithiated polymer is converted into a polymer containing an arsenic group, such as arsono, --As(O)(OH).sub.2, as substituent group, by reaction with arsine triethoxide followed by oxidation and hydrolysis by aqueous hydrogen peroxide.Type: GrantFiled: April 28, 1980Date of Patent: August 25, 1981Assignee: Allied Chemical CorporationInventors: Frank Mares, Stephen E. Jacobson
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Patent number: 4259527Abstract: A catalytic system for oxidation of organic compounds including olefins, cyclic ketones and secondary alcohols. Soluble peroxo or solid supported oxo or peroxo complexes of molybdenum or tungsten are used in the presence of hydrogen peroxide to effect the oxidation. The resulting products include lactones, hydroxy acids, ketoacids, hydroxy esters and ketoesters from cyclic ketones; ketones from secondary alcohols and polyols or derivatives thereof from allylic alcohols.Type: GrantFiled: May 18, 1979Date of Patent: March 31, 1981Assignee: Allied Chemical CorporationInventors: Frank Mares, Stephen E. Jacobson, Reginald T. Tang
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Patent number: 4213906Abstract: A process for oxidizing ketones with hydrogen peroxide. The ketone is contacted with the hydrogen peroxide in a buffered solution in the presence of an arsenic containing catalyst. This process can lead to lactones directly from cyclic ketones.Type: GrantFiled: July 21, 1978Date of Patent: July 22, 1980Assignee: Allied Chemical CorporationInventors: Frank Mares, Stephen E. Jacobson
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Patent number: 4171313Abstract: A catalytic system for oxidation of organic compounds including olefins, cyclic ketones and secondary alcohols. Soluble peroxo or solid supported oxo or peroxo complexes of molybdenum or tungsten are used in the presence of hydrogen peroxide to effect the oxidation. The resulting products include lactones, hydroxy acids, ketoacids, hydroxy esters and ketoesters from cyclic ketones; ketones from secondary alcohols and polyols or derivatives thereof from allylic alcohols.Type: GrantFiled: October 14, 1977Date of Patent: October 16, 1979Assignee: Allied Chemical CorporationInventors: Frank Mares, Stephen E. Jacobson, Reginald T. Tang