Patents Represented by Attorney W. G. Lane

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  • Hemihydrate type phosphoric acid process with crystal modifier
    Patent number: 4140748
    Abstract: Phosphate rock and sulfuric acid are reacted to produce phosphoric acid and calcium sulfate by means of the hemihydrate wet process. In this improved process, the calcium sulfate hemihydrate is crystallized from solution in the presence of an organic sulfonic acid or a derivative thereof. The organic sulfonic acid or its derivative improves the growth of the calcium sulfate hemihydrate crystals and thus improves the filtration rate of the slurry produced in this improved process.
    Type: Grant
    Filed: July 7, 1976
    Date of Patent: February 20, 1979
    Assignee: Occidental Petroleum Corporation
    Inventor: Fernando Ore
  • Hemihydrate type phosphoric acid process using reduced pressure
    Patent number: 4132760
    Abstract: Phosphate rock and sulfuric acid are reacted under conditions which result in the formation calcium sulfate hemihydrate and phosphoric acid of about 30% to about 55% P.sub.2 O.sub.5. A two vessel reaction system is used in which the reaction slurry undergoes inter- and intra- vessel circulation. This results in excellent dispersion of reactants and minimization of temperature and concentration gradients throughout the slurry.
    Type: Grant
    Filed: July 7, 1976
    Date of Patent: January 2, 1979
    Assignee: Occidental Petroleum Corporation
    Inventors: Fernando Ore, John D. Ellis, James H. Moore