Patents by Inventor Michael W. Minshall

Michael W. Minshall 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).

  • Purification of wet process phosphoric acid
    Patent number: 4296082
    Abstract: Wet process phosphoric acid is heated by passing alternating current through the acid, preferably in carbon apparatus to concentrations above 76% P.sub.2 O.sub.5 and preferably temperatures above 500.degree. C. to remove sulphate and fluoride and convert organic and basic impurities into a filterable precipitate; the acid is separated from the precipitate preferably after dilution with water to provide a high purity crystallizable product.
    Type: Grant
    Filed: April 10, 1979
    Date of Patent: October 20, 1981
    Assignee: Albright & Wilson Limited
    Inventors: Edward J. Lowe, Michael W. Minshall, Arthur Wilson
  • Purification of wet process phosphoric acid
    Patent number: 4215098
    Abstract: Wet process phosphoric acid is heated, preferably in carbon apparatus, by passing alternating current through the acid, to concentrations above 80% P.sub.2 O.sub.5 and preferably temperatures above 500.degree. C. to remove sulphate and fluoride and convert organic and basic impurities into a filterable precipitate: the acid is separated from the precipitate to provide a high purity crystallizable product.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: July 29, 1980
    Assignee: Albright & Wilson Limited
    Inventors: Edward J. Lowe, Arthur Wilson, Michael W. Minshall