Patents Represented by Attorney Frank M. Van Reit

Find this attorney in the Justia Lawyer Directory

  • Extraction of silver and palladium metals from aqueous solutions using tertiary phosphine sulfides
    Patent number: 4623522
    Abstract: Silver or palladium metals are selectively extracted from aqueous sulfuric acid solution by contacting the solution with a water-immiscible organic solvent extraction solution comprising a tertiary phosphine sulfide compound; separating the resulting silver- or palladium- phosphine sulfide complex from the aqueous solution; and recovering the silver or palladium metal from the complex by suitable stripping means.
    Type: Grant
    Filed: January 5, 1983
    Date of Patent: November 18, 1986
    Assignee: American Cyanamid Company
    Inventor: William A. Rickelton