Patents Represented by Attorney June Bostich
  • Patent number: 4851199
    Abstract: Vanadium is recovered from vanadium-containing phosphoric acid solutions by adjusting the pH so as to convert the dissolved vanadium to a simple vanadate compound which is insoluble in the phosphoric acid solution at the adjusted pH and separating the resulting insoluble simple vanadate compound from the phosphoric acid solution. The vanadium dissolved in the phosphoric acid solution can be converted to insoluble simple vanadates by reaction with oxidants and/or cations which form phosphoric acid-insoluble simple vanadates. These methods can be employed to selectively recover vanadium from phosphoric acid solutions containing other metals. They also can be employed to recover vanadium compounds from ores, scrap metal, and other vanadium sources by dissolving the vanadium from the vanadium source in phosphoric acid and recovering the vanadium as an insoluble simple vanadate from the phosphoric acid as described.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: July 25, 1989
    Assignee: Union Oil Company of California
    Inventor: Donald C. Young