Patents by Inventor Earl E. Borchert

Earl E. Borchert 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 decolorizing wet process phosphoric acid
    Patent number: 4643883
    Abstract: A method of decolorizing wet process phosphoric acid containing organic color-imparting impurities is provided. The process includes treating the acid with a strong oxidant at a temperature in the range of about 50.degree. to about 150.degree. C. by slowly adding the oxidant to the acid over a period of time of at least about 3 hours. The oxidized acid then is contacted with a regenerable activated carbon, preferably in a packed column, in order to adsorb the oxidized color-imparting impurities.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: February 17, 1987
    Assignee: International Minerals & Chemical Corp.
    Inventors: Earl E. Borchert, Robert J. Urban, Ray E. Barker