Patents Examined by Joseph A. Boska
  • Methylchloroform stabilizer compositions employing thiazolidine
    Patent number: 4424386
    Abstract: Metal corrosion in the presence of methylchloroform is inhibited when thiazolidine is added to the methylchloroform. The inhibitor is useful in degreasing processes and may be used in combination with other known inhibitors.
    Type: Grant
    Filed: September 10, 1981
    Date of Patent: January 3, 1984
    Assignee: The Dow Chemical Company
    Inventor: Nobuyuki Ishibe
  • Process for producing a graphite fluoride comprising mainly polydicarbon monofluoride represented by the formula (C.sub.2 F).sub.n
    Patent number: 4423261
    Abstract: A graphite fluoride comprising mainly poly-dicarbon monofluoride represented by the formula (C.sub.2 F).sub.n can be produced in an extremely short period of time by a process comprising reacting a graphite material with fluorine in the presence of a specific fluoride.
    Type: Grant
    Filed: January 8, 1982
    Date of Patent: December 27, 1983
    Assignees: Nobuatsu Watanabe, Applied Science Research Institute
    Inventors: Nobuatsu Watanabe, Tsuyoshi Nakajima, Masayuki Kawaguchi
  • Preparation of dibromostyrene
    Patent number: 4423262
    Abstract: A process for the preparation of an ar-dibromostyrene which comprises aqueous alcoholic alkali dehydrobromination of 2-bromoethyl dibromobenzene in the presence of a phase transfer catalyst at a temperature of between about 0.degree. C. and about 150.degree. C. The ar-dibromostyrenes have the particular utility as a co-monomer for the preparation of a co-polymer exhibiting a flame retardancy.
    Type: Grant
    Filed: March 13, 1980
    Date of Patent: December 27, 1983
    Assignee: Ethyl Corporation
    Inventor: Philip F. Jackisch
  • Process for producing phenyl-[3,3,3-trifluoropropyl)phenyl]methane
    Patent number: 4423259
    Abstract: Novel trifluoropropyl-substituted aryl- or aralkylbenzene of the formula: ##STR1## wherein R is a not-substituted or ring-substituted phenyl-, benzyl-, phenethyl- or alpha-methylbenzyl group by one 3,3,3-trifluoropropyl group, and n is an integer of 1,2 or 3, provided that the total number of 3,3,3-trifluoropropyl group of the above-mentioned trifluoropropyl-substituted aryl- or aralkylbenzene is at most 3, and a process for producing thereof are disclosed.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: December 27, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiro Kobayashi, Itsumaro Kumadaki, Masaaki Takahashi, Takashi Yamauchi
  • Method for introducing fluorine into an aromatic ring
    Patent number: 4423260
    Abstract: A process for introducing a fluorine atom into an aromatic hydrocarbon by effecting a substitution reaction between an aromatic hydrocarbon and an NF.sub.4.sup.+ cation containing salt.
    Type: Grant
    Filed: January 27, 1982
    Date of Patent: December 27, 1983
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Karl O. Christe, Carl J. Schack
  • Process for hydrogenating organic compounds with a supported cobalt-silica coprecipitated hydrogenation catalyst
    Patent number: 4420648
    Abstract: Supported coprecipitated cobalt-silica hydrogenation catalysts are disclosed. The catalysts are prepared by: preparing an aqueous reaction mixture containing cobalt cations, silicate anions and solid porous carrier particles under agitation to form a coprecipitate of the cobalt and silicate ions onto said solid porous support particles; heating the aqueous reaction mixture; and adding an alkaline precipitating agent to further precipitate the cobalt and silicate ions onto said solid porous carrier particles. The aqueous reaction mixture may additionally include copper cations.
    Type: Grant
    Filed: September 19, 1979
    Date of Patent: December 13, 1983
    Assignee: Exxon Research and Engineering Co.
    Inventors: James L. Carter, Allan E. Barnett
  • Dehydrohalogenation process
    Patent number: 4418232
    Abstract: Improvement in the catalytic dehydrohalogenation of a halogenated hydrocarbon to an ethylenically unsaturated product with aqueous alkali in a series of reactors in a cascade arrangement, wherein the fresh alkali feed is relocated from the first reactor to a reactor subsequent to the first, and partly spent alkali solution from the last reactor is recirculated to the first reactor, while the ethylenically unsaturated product is recovered from the effluent from the last reactor, and waste brine is removed from the effluent from the reactor immediately preceding that to which fresh alkali is fed. In this manner, the amount of both the alkali and the catalyst can be reduced, and the conversion is increased. Dehydrochlorination of 3,4-dichlorobutene-1 gives chloroprene, which is a valuable monomer for making synthetic elastomers.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: November 29, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Louis J. Maurin, III
  • Prevention of polymer formation in dehydrogenation of p-ethyltoluene
    Patent number: 4417084
    Abstract: In the catalytic dehydrogenation of p-ethyltoluene to p-methylstyrene, popcorn polymer forms and builds up in the condenser, shortly plugging it. This is prevented by adding minor amounts of H.sub.2 S continuously to the gaseous product effluent entering the condenser.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: November 22, 1983
    Assignee: Mobil Oil Corporation
    Inventor: Chin-Chiun Chu
  • Selective 2-chlorination of meta-dihalobenzenes
    Patent number: 4417081
    Abstract: The meta-dihalobenzenes are selectively 2-chlorinated by reacting same with a chlorine donor, e.g., hexachlorobenzene or pentachlorobenzene, in the presence of at least one alkali metal amide, e.g., sodamide, and at least one compound which complexes the cation of such at least one alkali metal amide.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: November 22, 1983
    Assignee: Rhone-Poulenc Specialites Chimiques
    Inventor: Gerard Soula
  • Process for producing 1,2-dichloroethane
    Patent number: 4410747
    Abstract: In the technology for producing 1,2-dichloroethane by reacting ethylene with chlorine by a liquid phase reaction at 65.degree. to 160.degree. C. in 1,2-dichloroethane containing a metal chloride catalyst, there is a disadvantage of a side reaction for producing 1,1,2-trichloroethane etc. at a large ratio to cause lower yield of 1,2-dichloroethane. The present invention is to overcome the disadvantage and to produce 1,2-dichloroethane in high yield by reducing the side reaction by incorporating at least one of aromatic compounds selected from the group consisting of benzene type hydrocarbons having the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 respectively represent hydrogen atom, C.sub.1 -C.sub.5 alkyl group and chlorinated derivatives thereof as a side reaction inhibitor at a ratio of at least 0.001 wt. % in the reaction medium.
    Type: Grant
    Filed: June 11, 1981
    Date of Patent: October 18, 1983
    Assignee: Ryo-nichi Company Ltd.
    Inventors: Tsunekazu Akiyama, Tetsuaki Kihara, Kazunaga Komizo, Hiroshi Kameo
  • Reduction in pour point of shale oil
    Patent number: 4410415
    Abstract: The pour point of shale oil is lowered by contacting with fresh oil shale. The temperature of contacting is preferably below 350.degree. F.
    Type: Grant
    Filed: May 5, 1980
    Date of Patent: October 18, 1983
    Assignee: Sunoco Energy Development Co.
    Inventor: Walter H. Seitzer
  • Process for the preparation of 1,3,5-trichlorobenzene
    Patent number: 4409407
    Abstract: 1,3,5-Trichlorobenzene is prepared by the isomerization of other trichlorobenzenes at an elevated temperature after the addition of aluminum trichloride and formic acid.
    Type: Grant
    Filed: August 16, 1982
    Date of Patent: October 11, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerd-Michael Petruck, Paul R. Wambach, deceased
  • Process for producing aryl- or aralkylbenzene having two benzene rings at least one of which is substituted by at least one 3,3,3-trifluoropropyl group
    Patent number: 4405824
    Abstract: Novel trifluoropropyl-substituted aryl- or aralkylbenzenes of the formula: ##STR1## wherein R is a not-substituted or ring-substituted phenyl-, benzyl-, phenethyl- or alpha-methylbenzyl group by one 3,3,3-trifluoropropyl group, and n is an integer of 1, 2 or 3, provided that the total number of 3,3,3-trifluoropropyl group of the above-mentioned trifluoropropyl-substituted aryl- or aralkylbenzene is at most 3, and a process for the production thereof are disclosed.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: September 20, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiro Kobayashi, Itsumaro Kumadaki, Masaaki Takahashi, Takashi Yamauchi
  • Trichloroethylene composition stabilized against oxidation
    Patent number: 4404412
    Abstract: Trichloroethylene is stabilized against oxidation by adding a nitrogen-containing compound selected from among .alpha.-(dimethylamino) propionitrile, thiazole, 1-aza-2-alkoxy-1-cycloalkene and 1,5-diazabicyclo[5.4.0]undec-5-ene. These may be used in combination with ethyl acetate, acetonitrile and pyrazine.
    Type: Grant
    Filed: February 4, 1982
    Date of Patent: September 13, 1983
    Assignee: The Dow Chemical Company
    Inventors: Nobuyuki Ishibe, Jimmie K. Harden
  • Solvent extraction method
    Patent number: 4401551
    Abstract: A method for extracting bitumen from bituminous sand is disclosed, in which the bituminous sand is contacted with previously recovered bitumen at a temperature sufficient to maintain the previously recovered bitumen as a liquid, and the resulting liquids are separated from the resulting solids.
    Type: Grant
    Filed: September 14, 1979
    Date of Patent: August 30, 1983
    Assignee: Chevron Research Company
    Inventor: David S. Mitchell
  • Process for preparing perfluoro(lower)alkylbenzenes and their derivatives
    Patent number: 4400563
    Abstract: A process for preparing perfluoro(lower)alkylbenzenes and derivatives thereof which comprises contacting a lower alkylbenzene or the corresponding derivative with hydrogen fluoride in the presence of chlorine in the gaseous phase at an elevated temperature to give the corresponding perfluoro(lower)alkylbenzene or its derivative thereof.
    Type: Grant
    Filed: June 20, 1979
    Date of Patent: August 23, 1983
    Assignee: Daikin Kogyo Co., Ltd.
    Inventors: Yohnosuke Ohsaka, Uji Hiramatsu, Toshihide Honda
  • 3,3,3-Trifluoropropyl derivatives of naphthalene or methylnaphthalene and process for preparing the same
    Patent number: 4396785
    Abstract: Novel 3,3,3-trifluoropropyl derivatives of naphthalene or methylnaphthalene of the general formula ##STR1## wherein R.sup.1 and R.sup.2 respectively represent hydrogen atom or methyl group, with the proviso that R.sup.1 and R.sup.2 do not simultaneously represent methyl group; m and n respectively represent zero or 1, with the proviso that the sum of m and n is 1, and a process for preparing the derivatives are disclosed. The derivatives are suitable as a dielectric material.
    Type: Grant
    Filed: August 7, 1981
    Date of Patent: August 2, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiro Kobayashi, Itsumaro Kumadaki, Masaaki Takahashi, Takashi Yamauchi
  • Hydrotreating process
    Patent number: 4396500
    Abstract: A hydrotreating catalyst comprises molybdenum, nickel, and phosphorus components supported on gamma alumina precalcined at a temperature of at least 1375.degree. F.
    Type: Grant
    Filed: July 11, 1980
    Date of Patent: August 2, 1983
    Assignee: Union Oil Company of California
    Inventor: Howard D. Simpson
  • Hydrocarbons hydroprocessing with imogolite catalyst
    Patent number: 4394253
    Abstract: A catalyst composition including imogolite and its use in hydrogen processing hydrocarbons are disclosed.
    Type: Grant
    Filed: September 26, 1979
    Date of Patent: July 19, 1983
    Assignee: Chevron Research Company
    Inventor: Robert A. Van Nordstrand
  • Method for the liquid phase oxidative fluorination of aromatic compounds
    Patent number: 4394527
    Abstract: There is provided a process for effecting fluorination of benzene, p-difluorobenzene or p-dichlorobenzene by subjecting the same to the action of argentic fluoride (AgF.sub.2) in the liquid phase to obtain fluorobenzene from benzene or a fluorinated cyclohexadiene from halogenated benzene, respectively, in good yield and purity.
    Type: Grant
    Filed: October 22, 1979
    Date of Patent: July 19, 1983
    Assignee: American Cyanamid Company
    Inventors: Robert G. Fischer, Jr., Arnold Zweig