Patents Assigned to Tsukishima Kaikai Co., Ltd.
  • Process for purifying monochloroacetic acid
    Patent number: 4383121
    Abstract: A mixture containing monochloroacetic acid and dichloroacetic acid as the main components are admixed with 5-25% by weight of water on the basis of sum total of monochloroacetic acid, dichloroacetic acid and water, and subjected to adiabatic cooling under a pressure of 133 to 2,660 Pa, whereby monochloroacetic acid is crystallized with a high purity.
    Type: Grant
    Filed: January 12, 1981
    Date of Patent: May 10, 1983
    Assignee: Tsukishima Kaikai Co., Ltd.
    Inventors: Ryoji Sugamiya, Kazuto Nakamaru, Keizo Takegami, Koji Miwa, Minoru Morita