Patents Assigned to Kurita Water Insustries Ltd.
  • Method of producing pure water
    Patent number: 5571419
    Abstract: Raw water is made acidic so that the pH is not more than 4.5 and heated in the presence of an oxidizing agent to decompose TOC components in the raw water, and then deionized, thereby producing ultrapure water having a greatly low concentration of organic matters.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: November 5, 1996
    Assignee: Kurita Water Insustries Ltd.
    Inventors: Yoshinobu Obata, Nobuhiro Orita, Hiroshi Kurobe