Patents by Inventor Ford T. Walker

Ford T. Walker 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 the simultaneous production of wet process phosphoric acid and sodium silicofluoride
    Patent number: 4178347
    Abstract: A process for recovering fluorine and silicon values from a waste-water stream produced in a wet-process phosphoric acid process which comprises:(a) diluting concentrated sulfuric acid with the waste-water stream and producing an SiF.sub.4 -containing gas during the dilution;(b) scrubbing the SiF.sub.4 -containing gas with phosphoric acid to produce a phosphoric acid solution containing fluosilicic acid;(c) reacting sodium carbonate with the phosphoric acid solution to precipitate solid sodium silicofluoride; and(d) separating the solid sodium silicofluoride from the phosphoric acid.
    Type: Grant
    Filed: May 17, 1978
    Date of Patent: December 11, 1979
    Assignee: Olin Corporation
    Inventor: Ford T. Walker