Patents Assigned to Thiotech, Inc.
  • Ore dressing method
    Patent number: 4699712
    Abstract: An ore dressing method for beneficiating copper from copper bearing ore by froth flotation employing the collector which comprises a mixture of an O,O-bis(alkylphenyl) phosphorodithioic compound, e.g., sodium O,O-bis(isopropylphenyl) phosphorodithioate, and a thiono compound which is an alkyl xanthogen formate, e.g., isobutyl xanthogen alkyl ethyl formate, and/or a thionocarbamate, e.g., N-ethyl O-isopropyl dialkyl thionocarbamate.
    Type: Grant
    Filed: February 25, 1986
    Date of Patent: October 13, 1987
    Assignee: Thiotech, Inc.
    Inventor: Kim N. Unger
  • Ore flotation method employing phosphorodithio compounds as frother adjuvants
    Patent number: 4584095
    Abstract: An ore dressing method for recovering metal values by froth flotation and from their ores, in which flotation of the ore is conducted in the presence of a frothing agent mixture comprising a minor amount of a phosphorodithioic compound as a synergistic adjuvant and a frother which may be an aliphatic alcohol or ketone; a terpenic oil or alcohol or phenol; or a polyalkylene or polyoxyalkylene glycol or ether.
    Type: Grant
    Filed: June 20, 1984
    Date of Patent: April 22, 1986
    Assignee: Thiotech, Inc.
    Inventor: Kim N. Unger
  • Ore flotation method
    Patent number: 4530758
    Abstract: The method of recovering copper from a copper-bearing ore which comprises froth flotation of the ore in alkaline circuit and in the presence of a phosphorodithio compound of the formula ##STR1## wherein X is hydrogen, alkali metal, or the ammonium radical and R is alkyl-substituted phenyl of from 6 to 14 carbon atoms having from 1 to 3 alkyl substituents and from 1 to 6 carbon atoms in each alkyl substituent. Sodium O,O-bis(isopropylphenyl) phosphorodithioate and O,O-bis(isopropylphenyl) phosphorodithoic acid are illustrative. The method is particularly useful with sulfide minerals, especially with copper sulfides and molybdenum sulfides.
    Type: Grant
    Filed: February 13, 1984
    Date of Patent: July 23, 1985
    Assignee: Thiotech, Inc.
    Inventors: Rory L. Tibbals, Kim N. Unger
  • Flotation collectors and methods
    Patent number: 4507198
    Abstract: A collector for use in concentrating metal values in ores by flotation, said collector comprising a mixture of (A) an O-alkyl N-alkylthionocarbamate wherein each alkyl radicals has from 1 to 6 carbon atoms and (B) at least 30 percent by weight of (A) of a normally liquid tall oil fatty acid fraction.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: March 26, 1985
    Assignee: Thiotech, Inc.
    Inventors: Kim N. Unger, Rory L. Tibbals, Dennis V. Smeltzer
  • Mixed alkylthionocarbamates flotation collectors and ore dressing methods in which the collectors are employed
    Patent number: 4387034
    Abstract: A collector for use in concentrating metal values in ores by flotation, said collector comprising a synergistic mixture of O-isopropyl N-ethylthionocarbamate and O-isobutyl N-methylthionocarbamate. Ore dressing flotation methods wherein said mixture serves as collector are also provided.
    Type: Grant
    Filed: October 23, 1981
    Date of Patent: June 7, 1983
    Assignee: Thiotech, Inc.
    Inventors: Kim N. Unger, Dennis V. Smeltzer