Patents by Inventor James C. Wade

James C. Wade 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).

  • Process for removing impurities from wet process of phosphoric acid
    Patent number: 4500502
    Abstract: A method of preparing a purified ammoniated phosphoric acid composition, comprising, reacting an aqueous wet process phosphoric acid with an ammonium ion source at a N/P.sub.2 O.sub.5 weight ratio ranging from about 0.06 to about 0.15 in the presence of solid phase metal ion containing impurities for a time sufficient to precipitate the majority of the impurities in the acid, the impurity precipitation comprising at least several complex metal salts at least one of which contains magnesium, aluminum and fluorine, and obtaining the purified ammoniated phosphoric acid by separating the precipitated impurities therefrom.
    Type: Grant
    Filed: June 28, 1983
    Date of Patent: February 19, 1985
    Assignee: Mississippi Chemical Corporation
    Inventors: Daniel P. McDonald, James C. Wade