Patents by Inventor Daniel E. Child

Daniel E. Child has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for recovering gold from refractory ore
    Patent number: 9920395
    Abstract: A method of recovering gold from refractory ore containing a carbonaceous material, a sulfide and gold is provided. Gypsum seed crystals are added to a slurry containing a roasted refractory ore or a pressure-oxidized refractory ore to decrease gypsum encapsulation of gold and improve gold recovery.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: March 20, 2018
    Assignee: Ecolab USA Inc.
    Inventors: Ronald V. Davis, Daniel E. Child, Walter Gerlach
  • METHOD FOR RECOVERING GOLD FROM REFRACTORY ORE
    Publication number: 20160083816
    Abstract: A method of recovering gold from refractory ore containing a carbonaceous material, a sulfide and gold is provided. Gypsum seed crystals are added to a slurry containing a roasted refractory ore or a pressure-oxidized refractory ore to decrease gypsum encapsulation of gold and improve gold recovery.
    Type: Application
    Filed: September 16, 2015
    Publication date: March 24, 2016
    Inventors: Ronald V. Davis, Daniel E. Child, Walter Gerlach
  • Sulfide flotation aid
    Patent number: 8413816
    Abstract: The invention provides a method of improving a flotation separation process. The method involves PAPEMP, a material previously thought to only be of use in controlling scale deposit on surfaces of equipment used in cyanide leaching. In the invention the PAPEMP is added to the flotation separation process for improved sulfide mineral separation. Not only does the addition of PAPEMP improve the overall recovery of sulfide complexed metals in flotation, but by doing so it also reduces the energy requirements and adds other efficiencies to other downstream ore processing and refining steps. This has the added benefit of helping to preserve the environment.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: April 9, 2013
    Assignee: Nalco Company
    Inventor: Daniel E. Child
  • SULFIDE FLOTATION AID
    Publication number: 20110198296
    Abstract: The invention provides a method of improving a flotation separation process. The method involves PAPEMP, a material previously thought to only be of use in controlling scale deposit on surfaces of equipment used in cyanide leaching. In the invention the PAPEMP is added to the flotation separation process for improved sulfide mineral separation. Not only does the addition of PAPEMP improve the overall recovery of sulfide complexed metals in flotation, but by doing so it also reduces the energy requirements and adds other efficiencies to other downstream ore processing and refining steps. This has the added benefit of helping to preserve the environment.
    Type: Application
    Filed: February 16, 2010
    Publication date: August 18, 2011
    Inventor: Daniel E. Child