Patents Represented by Law Firm French and Doesher
  • Ore flotation with combined collectors
    Patent number: 4534857
    Abstract: Sodium diethyl dithiophosphate and sodium ethyl trithiocarbonate are used for the flotation of molybdenum and/or copper containing ores.S-allyl-S'-n-butyl trithiocarbonate and N,N-dimethyl-S-benzyl dithiocarbamate are used for the flotation of molybdenum and/or copper containing ores.Sodium isopropyl xanthate and sodium n-butyl trithiocarbonate are used for the flotation of lead.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: August 13, 1985
    Assignee: Phillips Petroleum Company
    Inventors: Robert M. Parlman, Clarence R. Bresson