Patents Assigned to Goulding Chemicals Limited
  • Production of hydrogen fluoride
    Patent number: 4144315
    Abstract: Hydrogen Fluoride is manufactured from fluorosilicic acid. The fluorosilicic acid is reacted with ammonia to produce aqueous ammonium fluoride and solid silica. The ammonium fluoride is hydrolised in the presence of a mixture of ammonium fluoride and ammonium bifluoride, and the net production of ammonium bifluoride is converted to sodium bifluoride. The sodium bifluoride is decomposed by heating to hydrogen fluoride gas.
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: March 13, 1979
    Assignee: Goulding Chemicals Limited
    Inventors: Ralph E. Worthington, Padraic S. O'Neill, Paul F. X. Hackett
  • Production of hydrogen fluoride
    Patent number: 4089936
    Abstract: Ammonium fluoride is converted into a bifluoride by reaction with KF to form KF.HF, converting the latter to NaF.HF and heating said sodium bifluoride to form a solid product comprising NaF.
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: May 16, 1978
    Assignee: Goulding Chemicals Limited
    Inventors: William Henry Thompson, Ralph Eric Worthington, David John Stamper