Patents Assigned to Okamura Oil Mill Limited
  • Patent number: 4362871
    Abstract: A polycarboxylic acid glycidyl ester represented by the formula ##STR1##
    Type: Grant
    Filed: October 21, 1980
    Date of Patent: December 7, 1982
    Assignee: Okamura Oil Mill Limited
    Inventors: Teruaki Higashiguthi, Mithio Ishioka
  • Patent number: 4346235
    Abstract: A novel fluorine-containing compound of the formulaR.sub.1 --A--R.sub.2whereinA is ##STR1## R.sub.1 and R.sub.2 are each hydrogen or R.sub.3 OOC--CH.sub.2).sub.n, while R.sub.1 and R.sub.2 may not be hydrogen at the same time; X is hydrogen or halogen; R.sub.3 is hydrogen or a lower alkyl group; m is an integer of 1 to 5; and n is an integer of 4 to 11, and a process for preparing the same.
    Type: Grant
    Filed: June 10, 1980
    Date of Patent: August 24, 1982
    Assignees: Okamura Oil Mill Limited, Daikin Kogyo Co., Ltd.
    Inventors: Noboru Sonoda, Shinji Murai, Kazuhisa Takii
  • Patent number: 3984462
    Abstract: A process for producing dodecanedioic acid dimethyl ester comprising the steps of reacting cyclohexanone with methanol and hydrogen peroxide in the presence of an acid catalyst and water at a temperature below the boiling point of the methanol to produce methoxycyclohexyl peroxide, said methanol and hydrogen peroxide being used in an amount of about 15 to about 36 moles and in an amount of about 0.5 to about 1.5 moles per mole of the cyclohexanone respectively, dimerizing the resulting methoxycyclohexyl peroxide as it is contained in the reaction mixture in the presence of a ferrous salt and at least about 25 moles of methanol per mole of the starting cyclohexanone to produce dodecanedioic acid dimethyl ester, and separating the resulting dodecanedioic acid dimethyl ester from the reaction mixture.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: October 5, 1976
    Assignee: Okamura Oil Mill Limited
    Inventors: Shigeru Tsutsumi, Yoshishige Kida