Patents Examined by Vivian Garner
  • Method of attracting Tribolium castaneum Herbst with 2,6-dimethyl-octly formate
    Patent number: 4970069
    Abstract: According to the present invention, an attractant that possesses attraction effects with respect to Tribolium castaneum Herbst and moreover, is a stable compound for which the effectiveness will be continuous, is provided.That is, the present invention is 2,6-dimethyl octylformate and an atrractant of Tribolium castaneum Herbst which is formed from relevant chemical compounds.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: November 13, 1990
    Assignee: Japan Tobacco, Inc.
    Inventors: Masahiro Kono, Tatsuji Chuman, Takane Fujimori, Kenji Mori, Shigefumi Kuwahara
  • Process for making carboxylic acid esters using a crosslinked acrylic resin as the catalyst
    Patent number: 4970333
    Abstract: The production of esters via the reaction of an epoxide with a carboxylic acid hasbeen shown to give improved activity when a strong base macroporous anion exchange resin having an acrylic backbone is used in place of a styrene-divinylbenzene based anion exchange resin having an equivalent exchange capacity. Excellent results are obtained when acrylic acid and propylene oxide are reacted together in the presence of strong base macroporous anion exchange resins which have an acrylic backbone.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: November 13, 1990
    Assignee: The Dow Chemical Company
    Inventors: James A. Rabon, Jr., William C. Pike, Clinton J. Boriack
  • Process for the preparation of unsaturated carboxylic acids
    Patent number: 4968838
    Abstract: The present invention provides a process for the preparation of a catalyst used in the production of unsaturated carboxylic acids such as methacrylic acid by the gas phase catalytic oxidation of the corresponding unsaturated aldehydes such as methacrolein. Said catalyst is composed of a multi-component composition containing at least phosphorus, molybdenum and antimony. The present invention has attained an improvement in its catalytic performance such as conversion rate, selectivity, single-pass yield, etc. by using antimony trioxide with average particle size of no more than 0.2 micron as a starting material upon preparing said catalyst.
    Type: Grant
    Filed: January 12, 1989
    Date of Patent: November 6, 1990
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Motomu Oh-Kita, Kazuhiro Ishii, Masaake Kato
  • Process for the preparation of a glyoxylic acid ester
    Patent number: 4968833
    Abstract: The invention relates to a process for the preparation of a glyoxylic acid ester by oxydehydrogenation of the corresponding glycolic acid ester in the gas phase over a supported catalyst in a tubular reactor. The catalyst support consists of at least one cylindrical monolith which essentially has the same diameter as the reactor tube and contains channels with a diameter of 1 to 10 mm leading from the inlet to the outlet of the reactor tube. 60 to 90% of the monolith volume is formed by hollow spaces.
    Type: Grant
    Filed: January 11, 1985
    Date of Patent: November 6, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Robert K. Driscoll, Ernst I. Leupold, Wolfgang Ebertz, Friedrich Wunder
  • Process for the preparation of E-2-propyl-2-pentenoic acid and physiologically compatible salts thereof
    Patent number: 4966996
    Abstract: A novel process for the preparation of E-2-propyl-2-pentenoic acid, as well as the physiologically compatible salts thereof is described, in which 2-bromo-2-propyl-pentenoic acid ethyl ester is used as the starting compound. The bromine is split off with a cyclic tertiary amine in acetonitrile as the solvent and preferably the E-isomer of the ethyl ester is formed. The free acid is obtained by subsequent saponification under careful conditions and optionally, preferably using the corresponding carbon dioxide salts in aqueous acetone solution, is converted into the salt form.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: October 30, 1990
    Assignee: Desitin Arznemittel GmbH
    Inventor: Helmut Schafer
  • Process for the production of 1,2-dithiolan-3-pentanoic acid (thioctic acid) and 8-hydrocarbylthio-6-oxooctanoic acid
    Patent number: 4966732
    Abstract: 1,2-Dithiolane-3-pentanoic acid (D,L-thioctic acid) of the formula ##STR1## is prepared by a process comprising (a) reacting a 2-(3-alkylthiopropionyl)-cyclopentanone-1 of the formula ##STR2## where R is a C.sub.1 -C.sub.4 alkyl, phenyl or benzyl in aqueous alkaline solution at a temperature of about 20.degree. C. to about 90.degree. C. to form the corresponding carboxylic acid of formula VI ##STR3## (b) reacting the compound of formula VI with an alkyl mercaptan at a temperature between -20.degree. C. and 0.degree. C. to form the corresponding thioketal of formula VII ##STR4## (c) reacting the compound of formula VII with sodium in liquid ammonia at temperature temperture between -60.degree. C. and -10.degree. C.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: October 30, 1990
    Assignee: Degussa Aktiengesellschaft
    Inventors: Guenes Giray, Klaus Huthmacher, Axel Kleemann, Thomas Lied
  • Method for the preparation of naphthoquinone
    Patent number: 4960914
    Abstract: A catalyst for use in vapor phase oxidation of naphthalene into 1,4-naphthoquinone is dislosed. The catalyst which is supported on an inert carrier material is represented by the formula:(V)a(K)b(S)c(Fe)d(Sn)e(X)f(O)gwhere V, K, S, Fe, Sn and O stand for vanadium, potassium, sulfur, iron, tin and oxygen, respectively; X stands for at least one element such as silicon, titanium or aluminum which serves as a carrier in the form of oxide; and a, b, c, d, e, f and g are the atomic fractions of the respective elements wherein the ratio of a:b:c:d:e:f=10:10-100:5-100:0.1-10:0.05-10:10-300. Using the above catalyst the vapor phase oxidation can be effected at a relatively low temperature of not higher than 500.degree. C., usually not higher than 420.degree. C., resulting in the formation of 1,4-naphthoquinone in a high yield and with a high selectivity.
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: October 2, 1990
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventor: Ryohei Minami
  • Mercaptoalkyl acetoacetates
    Patent number: 4960924
    Abstract: This invention relates to mercaptoalkyl acetoacetates and a process for preparing mercaptoalkyl acetoacetates. The process embraces the reaction of TKD (a diketene-acetone adduct) with hydroxy-functional mercaptans. Preferred is the reaction of TKD with 2-mercaptoethanol to yield mercaptoethyl acetoacetate. Mercaptoethyl acetoacetate is an effective chain transfer agent in free radical polymerization reactions with the benefit of introducing reactive acetoacetate functionally into the formed polymer.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: October 2, 1990
    Assignee: Rohm and Haas Company
    Inventors: Daniel A. Bors, William D. Emmons
  • Method for manufacture of fluorine-containing aromatic derivatives
    Patent number: 4956123
    Abstract: Fluorine-containing aromatic derivatives are produced by the reaction of di(haloacyl)peroxide represented by the general formula: ##STR1## (wherein X stands for a fluorine, chlorine, or hydrogen atom and n for an integer of the value of 1 to 10) with aromatic unsaturated monomers represented by the general formula: ##STR2## (wherein Y stands for hydrogen atom, methyl, ethyl, propyl, acetyl, propionyl, acetyloxy, propionyloxy, methoxy, ethoxy, propoxy, vinyl, isopropenyl, or nitro group, or a halogen atom, R.sup.1 for hydrogen atom, methyl, ethyl, propyl, or butyl group, R.sup.2 for hydrogen atom, methyl or phenyl group, and m for an integer of the value of 1 to 5).
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: September 11, 1990
    Assignee: Nippon Oils & Fats Company, Ltd.
    Inventors: Hideo Sawada, Michio Kobayashi, Masato Yoshida
  • 2-5,disubstituted-7,7,8,8-tetracyanoquinodimethanes
    Patent number: 4950774
    Abstract: A 2,5-disubstituted-7,7,8,8-tetracyanoquinodimethane of the general formula ##STR1## wherein R.sup.1 is hydrogen or methyl, X is COOR.sup.2 (in which R.sup.2 is hydrogen or C.sub.1-10 alkyl), --CONR.sup.3 R.sup.4 (in which R.sup.3 and R.sup.4 each is hydrogen or C.sub.1-4 alkyl) or --CN, provided that when R.sup.1 is hydrogen, X is --CN or --CONR.sup.3 R.sup.4. The tetracyanoquinodimethane derivatives are starting materials for the production of polyamides, polyurethanes or organic semiconductor devices.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: August 21, 1990
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki
    Inventor: Takeo Kawabata
  • Catalytic process for production of alkoxylated esters
    Patent number: 4948915
    Abstract: The reaction of a monohydroxyl or dihydroxyl alcohol with an alpha, beta-unsaturated ester in contact with a strongly basic anionic exchange resin in the hydroxyl or alkoxide form is unexpectedly and unpredictably enhanced by proper control of the water content in the reaction mixture and the temperature at which the reaction is carried out.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: August 14, 1990
    Assignee: Union Carbide Chemicals and Plastics Company Inc.
    Inventor: Brian T. Keen
  • Process for the preparation of E-2-propyl-2-pentenoic acid and physiologically compatible salts thereof
    Patent number: 4945180
    Abstract: A novel process for the preparation of E-2-propyl-2-pentenoic acid and its physiologically compatible salts is described, in which di-n-propyl-ketone-cyanohydrin is used as the starting compound. The compound is either(a) dehydrated with thionyl chloride and the acid nitrile formed is subsequently saponified with a stoichiometric excess of potassium hydroxide, or(b) is initially converted into 2-hydroxy-2-propyl-pentanoic acid and the latter is subsequently dehydrated in the presence of a less than stoichiometric quantity of a tertiary amine at a temperature of at least 200.degree. C.The free acid is optionally converted into the salt form, preferably using the corresponding salts of carbon dioxide in an aqueous acetone solution.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: July 31, 1990
    Assignee: Desitin Arzneimittel GmbH
    Inventor: Helmut Schafer
  • Process for preparation of alpha, beta-unsaturated acids
    Patent number: 4943659
    Abstract: Catalyst and process are disclosed for preparation of alpha, beta-unsaturated acids. Catalyst comprises a silica component and a Group IA alkali metal component which is present in an amount of from 200 to 15,000 parts per million, said silica component containing less than about 500 parts per million individually of aluminum, zirconium, titanium, iron and mixtures thereof. Process comprises reacting formaldehyde and a carboxylic acid of the formula RHC.sub.2 COOH wherein R is a member of the class consisting of --H, -alkyl, -aryl, -aralkyl, -cycloalkyl, and -alkylaryl radicals in the presence of said catalyst. Catalyst activity is maintained during process by addition of source of alkali metal component.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: July 24, 1990
    Assignee: Amoco Corporation
    Inventor: Gary P. Hagen
  • Process for preparation of .alpha.-acetoxy-.alpha.-methyl-N,N'-diacetyl malonamide
    Patent number: 4943654
    Abstract: Process for the preparation of .alpha.-acetoxy-.alpha.-methyl-N,N'-diacetylmalonamide wherein hydrocyanic acid or a cyanide is reacted in a first step with acetic anhydride and then in a second step the reaction mixture so obtained is treated with acetic acid in the presence of an acid catalyst, wherein the first step is carried out in the presence of a catalyst based on anion exchange resins in which the functional groups are quaternary ammonium or tertiary amine, such .alpha.-acetoxy-.alpha.-methyl-N,N'-diacetylmalonamides being very useful as activators in bleaching and cleaning compositions which are thus active at lower temperatures.
    Type: Grant
    Filed: January 15, 1986
    Date of Patent: July 24, 1990
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Bernard Dubreux, Charles Laviron
  • Process for preparation of methacrylic acid with regeneration of catalyst
    Patent number: 4942258
    Abstract: Process is disclosed for regeneration of a solid methacrylic acid catalyst wherein said catalyst is decoked in the presence of an oxygen-containing gas at an initial temperature no greater than 650.degree. F. and then by increasing the temperature incrementally to complete the regeneration at a temperature of from about 650.degree. F. to 800.degree. F.
    Type: Grant
    Filed: April 12, 1988
    Date of Patent: July 17, 1990
    Assignee: Amoco Corporation
    Inventor: Thomas G. Smith
  • Production of polyol polyesters having reduced color content
    Patent number: 4942228
    Abstract: Polyol polyesters having reduced color content are prepared by base-catalyzed transesterification of pretreated lower (i.e., C.sub.1 -C.sub.3) alkyl fatty esters with polyols. The pretreatment comprises the steps of contacting the alkyl fatty esters (in a liquid state) with an alkoxide base, separating undissolved solids from the esters, and then distilling the esters.
    Type: Grant
    Filed: May 6, 1986
    Date of Patent: July 17, 1990
    Assignee: The Procter & Gamble Company
    Inventor: Michael S. Gibson
  • Synthesis of esters from alcohols containing carbon monoxide as an impurity
    Patent number: 4939292
    Abstract: Esters are prepared by contacting, under suitable reaction conditions, a feed stream comprising a primary alcohol of 1-4 carbon atoms per molecule (preferably methanol, ethanol) and carbon monoxide with a catalyst composition comprising (a) copper or a copper compound (preferably CuO), (b) zinc oxide, (c) at least one metal or compound of at least one metal selected from the group consisting of cobalt, ruthenium, iridium, platinum, molybdenum, and rhenium (preferably cobalt and/or rhenium) and, optionally, (d) alumina.
    Type: Grant
    Filed: October 2, 1985
    Date of Patent: July 3, 1990
    Assignee: Phillips Petroleum Company
    Inventors: David J. Elliott, Filippo Pennella
  • Preparation of 4-pentenates
    Patent number: 4933487
    Abstract: In an improved process for preparing 4-pentenates by isomerization, where isomeric pentenates are treated at elevated temperatures with zeolites and 4-pentenates are distilled out of the reaction mixture, the improvement comprises using pentenates in mixture with alkanols.
    Type: Grant
    Filed: March 22, 1989
    Date of Patent: June 12, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Hoelderich, Heinrich Aichinger, Fritz Naeumann, Rolf Fischer
  • Process for the manufacture of 6-chloro-1,4-diacetoxy-2,3-dimethoxynaphthalene
    Patent number: 4933489
    Abstract: An improved process for the manufacture of the antipsoriatic agent, 6-chloro-1,4-diacetoxy-2,3-dimethoxynaphthalene, is herein described which involves in situ Diels-Alder coupling of 2,3-dimethoxybenzo-1,4-quinone with a 3-chloro-1-alkoxy-1,3-butadiene; 1,4-elimination of the alcohol with aromatization of the chlorine-bearing ring, and acetylation.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: June 12, 1990
    Assignee: Warner-Lambert Company
    Inventor: Daniel L. Flynn
  • Preparation of adipic acid
    Patent number: 4931590
    Abstract: Adipic acid is prepared by a process which comprises the following steps:(a) Hydroformylation of a pentenoic ester by reaction with carbon monoxide and hydrogen at elevated temperatures and under superatmospheric pressure in the presence of a cobalt carbonyl or rhodium carbonyl complex with formation of a mixture of 5-, 4- and 3-formylvaleric esters,(b) isolation of the 5-formylvaleric ester from the resulting mixture of 5-, 4- and 3-formylvaleric esters, a mixture essentially consisting of 4- and 3-formylvaleric esters remaining,(c) dehydrocarbonylation of the mixture consisting essentially of 4- and 3-formylvaleric esters in the presence of one or more elements of subgroup 8 of the Periodic Table at from 50.degree. to 400.degree. C.
    Type: Grant
    Filed: June 10, 1988
    Date of Patent: June 5, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolf Kummer, Franz Merger, Werner Bertleff, Rolf Fischer