Patents Assigned to Orient Kagaku Kogyo K.K.
  • Method of obtaining dried terephthalic acid
    Patent number: 4230886
    Abstract: Terephthalic acid produced by oxidizing paraxylene can be obtained in the form of dried powder from the slurry containing terephthalic acid and acetic acid and/or water by using combination of a tubular type heater having at least one heating tube and a separation chamber in which the heating tube(s) open(s) at one end(s) thereof.Critical slurry concentrations for smooth operation are given.
    Type: Grant
    Filed: June 8, 1979
    Date of Patent: October 28, 1980
    Assignees: JGC Corporation, Orient Kagaku Kogyo K.K.
    Inventors: Fujio Tsuchiya, Kenzo Yamamoto, Katsunobu Yamaguchi, Akio Okagami
  • Method of treating mother liquor of reaction in terephthalic acid production
    Patent number: 4219669
    Abstract: Reaction mother liquor of terephthalic acid production is treated to separate volatile component mainly composed of acetic acid and solid components composed of used catalyst or heavy metal salt(s), residual terephthalic acid and reaction by-products by using combination of a tubular type heater having at least one heating tube of a relatively small diameter and a separation chamber in which the heating tube(s) open(s) at one end thereof.
    Type: Grant
    Filed: June 8, 1979
    Date of Patent: August 26, 1980
    Assignees: JGC Corporation, Orient Kagaku Kogyo K.K.
    Inventors: Fujio Tsuchiya, Kenzo Yamamoto, Katsunobu Yamaguchi, Akio Okagami