Patents Represented by Attorney Patricia J. Hogan

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  • Process for transhalogenating a halophosphorous compound with anhydrous hydrogen fluoride
    Patent number: 5049691
    Abstract: Phosphorus compounds having at least one chlorine, bromine or iodine bonded directly to phosphorus are transhalogenated with fluorine by reaction with anhydrous hydrogen fluoride in an inert solvent, e.g., xylene, methylene chloride, in a manner such that said anhydrous hydrogen fluoride is added to said phosphorus compound at a rate such that said anhydrous hydrogen fluoride reacts with said phosphorus compound without the accumulation of an amount of unreacted anhydrous hydrogen fluoride which is sufficient to cause substantial decomposition of the desired fluorophosphorus product.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: September 17, 1991
    Assignee: Ethyl Corporation
    Inventors: Edward A. Burt, Lester P. J. Burton, Meng-Sheng Ao, Barbara C. Stahly
  • Organoborosilazane polymers
    Patent number: 5045399
    Abstract: Preceramic polymers which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by reacting about 0.25-20 parts by weight of a trialkyl- or trialkoxyboroxine in which the alkyl or alkoxy groups contain 1-6 carbons with one part by weight of a poly-silazane to form an organoborosilazane polymer.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: September 3, 1991
    Assignee: Ethyl Corporation
    Inventor: Leonard M. Niebylski
  • Preceramic compositions and ceramic products
    Patent number: 5041337
    Abstract: Preceramic polymer dispersions which have particular utility in providing protective ceramic coatings having low moisture sensitivity on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by dispersing about 0-3 parts by weight of aluminum-silicon eutectic, about 0-4 parts by weight of silicon carbide, about 1.5-5 parts by weight of silicon boride, and about 0.4-5 parts by weight of silicon metal in a solution or dispesion obtained by dispersing about 0.1-1.0 parts by weight of a Group IIA metal salt in an organoborosilazane polymer obtained by reacting about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polysilazane in an organic solvent and, if desired, heating the dispersion to convert it to a solution.
    Type: Grant
    Filed: January 17, 1990
    Date of Patent: August 20, 1991
    Assignee: Ethyl Corporation
    Inventor: Leonard M. Niebylski
  • Secondary diamines
    Patent number: 5041668
    Abstract: Aromatic diamines having one or two benzene rings, two ar-N-methylamino substituents, and ar-alkyl substituents in all positions ortho to the amino substituents are novel compounds which can be used in the preparation of polyurethanes, polyureas, polyurethane-urea polymers, and epoxy resins.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: August 20, 1991
    Assignee: Ethyl Corporation
    Inventors: Christopher J. Nalepa, J. Kenneth Presswood, Gordon G. Knapp
  • Synergistic lime soap dispersing composition
    Patent number: 5024777
    Abstract: A bar soap composition which contains 5-95 weight percent of a fatty acid soap and a C.sub.8-20 alkyl dimethylamine oxide and sodium cocoyl isethionate in a weight ratio of 0.33-3.0:1.0 which results in synergistic improvement in the lime soap dispersancy of the composition.
    Type: Grant
    Filed: January 23, 1990
    Date of Patent: June 18, 1991
    Assignee: Ethyl Corporation
    Inventors: Kim R. Smith, James E. Borland
  • Process for preparing (hydrocarbylthio) aromatic amines
    Patent number: 5015770
    Abstract: (Hydrocarbylthio)aromatic amines are prepared by reacting an aromatic amine, such as an aminobenzene, with a hydrocarbyl disulfide, such as an alkyl disulfide, in the presence of iodine, iodine monochloride, or iodine monobromide as a catalyst.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: May 14, 1991
    Assignee: Ethyl Corporation
    Inventor: Gordon G. Knapp
  • Ceramic products derived from polycarbosilanes and boroxines
    Patent number: 5013609
    Abstract: Preceramic compositions which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by mixing about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polycarbosilane in an organic solvent.
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: May 7, 1991
    Assignee: Ethyl Corporation
    Inventor: Leonard M. Niebylski
  • Preceramic compositions and ceramic products
    Patent number: 5009961
    Abstract: Preceramic polymer dispersions which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by dispersing about 0.25-2.0 parts by weight of silicon metal, about 0.25-2.0 parts by weight of silicon tetraboride, about 0.25-2.0 parts by weight of silicon hexaboride, and about 0-2 parts by weight of silicon carbide in the product obtained by dispersing about 0.1-1.0 part by weight of a Group IVA metal salt or an organometallic Group IVA metal compound in an organic solvent solution containing one part by weight of a polysilazane and, if desired, heating the Group IVA compound/polysilazane dispersion to convert it to a solution.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: April 23, 1991
    Assignee: Ethyl Corporation
    Inventor: Leonard M. Niebylski
  • Process for preparing organosilazanes
    Patent number: 5010157
    Abstract: Organosilazanes having higher prepolymerization molecular weights are prepared by subjecting to elevated temperatures in a dry atmosphere the total reaction mixture resulting from the ammonolysis of an organohalosilane in an organic solvent. Their higher molecular weights expedite the polymerization of the organosilazanes to preceramic polysilazanes.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: April 23, 1991
    Assignee: Ethyl Corporation
    Inventors: Mannarsamy Balasubramanian, Pranab Choudhury
  • Aromatic diimines
    Patent number: 5008453
    Abstract: Aromatic diimines having one or two benzene rings, two ar-imino substituents corresponding to the formula --N.dbd.CH.sub.2, and ar-alkyl substituents in all positions ortho to the imino substituents are novel compounds which can be used in the preparation of polyurethanes, polyureas, polyurethane-urea polymers, and epoxy resins.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: April 16, 1991
    Assignee: Ethyl Corporation
    Inventors: Christopher J. Nalepa, J. Kenneth Presswood, Gordon G. Knapp
  • Preceramic compositions and ceramic products
    Patent number: 5006492
    Abstract: Low density silicon nitride ceramics having improved bending an specific strengths over known silicon nitride ceramics derived from silicon nitride powder and polysilazane precursors are prepared by (A) intimately mixing about 50-80% by weight of silicon nitride powder with about 15-50% by weight of perceramic polysilazane binder, (B) pulverizing the mixture to form particles having a particle size smaller than 105 micrometers, (C) separating from those particles any particles having a particle size larger than about 105 micrometers, (D) molding the resultant composition having a particle size not larger than about 105 micrometers, and (E) pyrolyzing the molded composition in an inert atmosphere to a temperature of about 1200.degree.-1450.degree. C.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: April 9, 1991
    Assignee: Ethyl Corporation
    Inventors: John Semen, John J. Rogers
  • Process for preparing organosilazanes
    Patent number: 5006625
    Abstract: Organosilazanes having higher prepolymerization molecular weights are prepared by the ammonolysis of organohalosilanes at a temperature of about 15.degree.-23.degree. C. Their higher molecular weights facilitate the polymerization of the organosilazanes to preceramic polysilazanes.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: April 9, 1991
    Assignee: Ethyl Corporation
    Inventors: Mannarsamy Balasubramanian, Martin E. Gluckstein, Edwin D. Hornbaker
  • Haloethylation of aromatic hydrocarbons
    Patent number: 5003116
    Abstract: A monoalkylaromatic hydrocarbon is haloethylated to a 1-halo-1-arylethane with minimal co-formation of diarylalkane by-product by reacting it with hydrogen chloride or bromide and acetaldehyde in the presence of sulfuric acid only until not more than about 60% of the monoalkylaromatic hydrocarbon has been converted.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: March 26, 1991
    Assignee: Ethyl Corporation
    Inventor: Barbara C. Stahly
  • Haloethylation of aromatic hydrocarbons
    Patent number: 5001288
    Abstract: A monoalkylaromatic hydrocarbon is haloethylated to a 1-halo-1-arylethane with minimal co-formation of diarylalkane by-product by reacting it with hydrogen chloride or bromide and acetaldehyde at a temperature in the range of abaout +10.degree. C. to about -35.degree. C. in the presence of at least about 1.4 mols of hydrogen sulfate per mol of the aromatic hydrocarbon and in the absence of more than about 15% by weight of water, based on the weight of the hydrogen sulfate; the temperature being not higher than about -10.degree. C. when hydrogen chloride is employed.
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: March 19, 1991
    Assignee: Ethyl Corporation
    Inventor: George A. Knesel
  • Amines for alcohols
    Patent number: 4994620
    Abstract: Alkylamines such as methylamine and dimethylamine react with alcohols and aldehydes at 150.degree.-275.degree. C. in the presence of hydrogen and a catalyst initially consisting essentially of (1) a copper compound selected from copper carbonate, copper oxide, copper hydroxide or mixtures thereof, (2) a zinc compound selected from zinc carbonate, zinc oxide, zinc hydroxide or mixtures thereof and (3) a metal compound selected from carbonates, oxides and hydroxides of a Group IIA metal and mixtures thereof at least one of said copper compound and zinc compound being a carbonate. Conversions and yields are high and the amount of heavy by-product is low.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: February 19, 1991
    Assignee: Ethyl Corporation
    Inventors: Pak Y. Fong, Kim R. Smith, Joe D. Sauer
  • Amines from alcohols
    Patent number: 4994622
    Abstract: Mono- and di-lower alkylamines, e.g. methylamine or dimethylamine, are alkylated by reaction with C.sub.8-22 alcohol in the presence of hydrogen at a temperature of about 150.degree.-275.degree. C. in contact with a copper-zinc-alkaline earth metal base containing catalyst (e.g., CuO-ZnO-Ba(OH).sub.2) while removing water formed in the reaction.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: February 19, 1991
    Assignee: Ethyl Corporation
    Inventors: Pak Y. Fong, Kim R. Smith, Joe D. Sauer
  • Cyanoalkenylation process
    Patent number: 4994596
    Abstract: 1-Cyano-1-(4-alkylphenyl)alkenes having utility as chemical intermediates, especially in the preparation of ibuprofen and related pharmaceuticals, are prepared by reacting an alkylbenzene with an alkali metal cyanide and an acid halide in the presence of aluminum chloride.
    Type: Grant
    Filed: January 29, 1990
    Date of Patent: February 19, 1991
    Assignee: Ethyl Corporation
    Inventor: Barbara C. Stahly
  • Amine oxide process
    Patent number: 4994614
    Abstract: Tert-amine oxides that are substantially free of nitrosamines are made by reacting a tert-amine, e.g., dodecyl dimethylamine, with aqueous hydrogen peroxide in the presence of the synergistic combination of (a) ascorbic acid and (b) a promoter formed from carbon dioxide.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: February 19, 1991
    Assignee: Ethyl Corporation
    Inventors: Dennis P. Bauer, Teresa K. Summerford
  • Phenolic antioxidant process
    Patent number: 4994628
    Abstract: 3,5-dialkyl-4-hydroxybenzyl-substituted benzene compounds are made by reacting 2,6-dialkyl-4-methoxymethyl phenols with a benzene compound having an unsubstituted nuclear position in an inert solvent and in the presence of sulfuric acid catalyst while distilling methanol by-product from the reaction mixture as it forms.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: February 19, 1991
    Assignee: Ethyl Corporation
    Inventors: Lloyd E. Goddard, George L. Mina
  • Antioxidant process
    Patent number: 4992597
    Abstract: 3,5-dialkyl-4-hydroxybenzyl-substituted benzene compounds are made by reacting 2,6-dialkyl-4-methoxymethyl phenols with a benzene compound having an unsubstituted nuclear position in an inert solvent and in the presence of an organic sulfonic acid catalyst while distilling methanol by-product from the reaction mixture as it forms.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: February 12, 1991
    Assignee: Ethyl Corporation
    Inventors: George L. Mina, Gary D. Heidebrecht