Patents Assigned to Mineral & Chemical Resource Co.
  • Production of sulfur from a H.sub.2 S-bearing gas stream
    Patent number: 4479929
    Abstract: A process for reacting the H.sub.2 S in H.sub.2 S-bearing gas streams with SO.sub.2 in a solvent to produce elemental sulfur, including the steps of oxidizing approximately 1/3 of the H.sub.2 S in the stream to SO.sub.2, absorbing that SO.sub.2 with a dialkyl alkyl phosphonate absorbent and reacting that SO.sub.2 with the remaining H.sub.2 S from the stream in the presence of the phosphonate solvent, thereby forming elemental sulfur and water.
    Type: Grant
    Filed: December 9, 1982
    Date of Patent: October 30, 1984
    Assignee: Mineral & Chemical Resource Co.
    Inventor: F. Hilton Lacy, Jr.
  • Solvent extraction of zinc from sulfite-bisulfite solution
    Patent number: 4053552
    Abstract: Zinc values are leached or converted in a solution containing excess SO.sub.2 or HSO.sub.3.sup.- ions, selectively extracted from that solution into an organic phase containing organo acid phosphates and stripped from the organic phase for further processing.
    Type: Grant
    Filed: March 15, 1976
    Date of Patent: October 11, 1977
    Assignees: General Mills Chemicals Co., Mineral & Chemical Resource Co.
    Inventors: Jay B. Clitheroe, Robert Brantley Sudderth