Patents Assigned to Advanced Mineral Technologies, Inc.
  • Metal recovery
    Patent number: 4898827
    Abstract: A relatively solid, stable biomass reaction product is provided produced from microorganisms having metal uptake properties when contacted by an aqueous solution containing metal cations. The biomass reaction product is produced by treating cells thereof with a caustic solution, whereby the biomass reaction product after drying is characterized in the particulate state of having substantially enhanced uptake of metal cations from aqueous solutions as compared to the metal uptake property of the microorganism before treatment. The biomass reaction product in the particulate state is preferably immobilized in an insoluble binder.
    Type: Grant
    Filed: July 3, 1986
    Date of Patent: February 6, 1990
    Assignee: Advanced Mineral Technologies, Inc.
    Inventors: James A. Brierley, Corale L. Brierley, Raymond F. Decker, George M. Goyak
  • Metal recovery
    Patent number: 4789481
    Abstract: A relatively solid, stable biomass reaction product is provided produced from microorganisms having metal uptake properties when contacted by an aqueous solution containing metal cations. The biomass reaction product is produced by treating cells thereof with a caustic solution, whereby the biomass reaction product after drying is characterized in the particulate state of having substantially enhanced uptake of metal cations from aqueous solutions as compared to the metal uptake property of the microorganism before treatment.
    Type: Grant
    Filed: April 19, 1987
    Date of Patent: December 6, 1988
    Assignee: Advanced Mineral Technologies, Inc.
    Inventors: James A. Brierley, Corale L. Brierley, Raymond F. Decker, George M. Goyak
  • Thermophilic microbial treatment of precious metal ores
    Patent number: 4729788
    Abstract: A method is provided for the recovery of precious metals, such as gold and silver, from refractory sulfidic material and refractory carbonaceous sulfidic material. The sulfidic material is pulped and bioleached using either facultative or obligate thermophiles at temperatures in excess of about 45.degree. C. and ranging up to about 90.degree. C. The residue remaining from the bioleach is neutralized and washed and the precious metals therein recovered by dissolution.
    Type: Grant
    Filed: January 23, 1987
    Date of Patent: March 8, 1988
    Assignee: Advanced Mineral Technologies, Inc.
    Inventors: Stephen R. Hutchins, Michael S. Davidson, James A. Brierley, Corale L. Brierley
  • Treatment of microorganisms with alkaline solution to enhance metal uptake properties
    Patent number: 4690894
    Abstract: A relatively solid, stable biomass reaction product is provided produced from microorganisms having metal uptake properties when contacted by an aqueous solution containing metal cations. The biomass reaction product is produced by treating cells thereof with a caustic solution, whereby the biomass reaction product after drying is characterized in the particulate state of having substantially enhanced uptake of metal cations from aqueous solutions as compared to the metal uptake property of the microorganism before treatment.
    Type: Grant
    Filed: September 20, 1985
    Date of Patent: September 1, 1987
    Assignee: Advanced Mineral Technologies, Inc.
    Inventors: James A. Brierley, Corale L. Brierley, Raymond F. Decker, George M. Goyak