Patents by Inventor Kazuo Koshida

Kazuo Koshida 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).

  • Method of manufacturing alkylene oxide adducts of an aliphatic alcohol
    Patent number: 3959389
    Abstract: An improvement is provided in the manufacture of alkylene oxide adducts of an aliphatic alcohol in which the reaction mixture, comprising the alkylene oxide adduct, unreacted alcohol, acid catalyst residue, carbonyl compounds and hydrocarbons, is treated to remove unreacted alcohol for recycle to the adduct formation step. To prevent the build-up in the system of carbonyl compounds and hydrocarbons which are not easily distillable from the recycle alcohol because of their respective boiling points, at least a portion of the recycle alcohol is esterified with boric acid, the esterification mixture is subjected to distillation to remove volatile portions, and the borate ester thus obtained is hydrolyzed to recover the alcohol which is recycled to the adduct formation step.
    Type: Grant
    Filed: February 1, 1974
    Date of Patent: May 25, 1976
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Naoji Kurata, Kazuo Koshida, Toshihiro Fujii, Koichi Matsuhiro, Yukio Okuda
  • Method of manufacturing alkylene oxide adducts of an aliphatic alcohol
    Patent number: 3932531
    Abstract: An improvement is provided in the manufacture of alkylene oxide adducts of an aliphatic alcohol in which the reaction mixture, comprising the alkylene oxide adduct, unreacted alcohol, acid catalyst residue, carbonyl compounds and hydrocarbons, is treated to remove unreacted alcohol for recycle to the adduct formation step. To prevent the build-up in the system of carbonyl compounds and hydrocarbons which are not easily distillable from the recycle alcohol because of their respective boiling points, at least a portion of the recycle alcohol is esterified with boric acid, the esterification mixture is subjected to distillation to remove volatile portions, and the borate ester thus obtained is hydrolyzed to recover the alcohol which is recycled to the adduct formation step.
    Type: Grant
    Filed: July 14, 1972
    Date of Patent: January 13, 1976
    Assignee: Nippon Shokubai Kaguku Kogyo Co., Ltd.
    Inventors: Naoji Kurata, Kazuo Koshida, Toshihiro Fujii, Koichi Matsushiro, Yukio Okuda