Patents by Inventor David Michael Way

David Michael Way 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 treating arsenic containing materials
    Patent number: 8771619
    Abstract: A method for selectively removing arsenic from a sulphide material containing arsenic by conducting a leaching step that includes contacting the material with a leaching solution that leaches arsenic from the material to form a pregnant liquor containing dissolved arsenic and a solid of a sulphide material of reduced arsenic content, and subsequently separating the solid from the pregnant liquor. The fresh leaching solution that is provided to the leaching step is an alkaline solution having a sulphide-containing compound present in an amount of from 0 to 1.0 times the amount of sulphur containing compound required to react with the arsenic present in the material.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: July 8, 2014
    Assignee: Xstrata Queensland Limited
    Inventors: David Nakon, David Michael Way
  • METHOD FOR TREATING ARSENIC CONTAINING MATERIALS
    Publication number: 20140017152
    Abstract: A method for selectively removing arsenic from a sulphide material containing arsenic by conducting a leaching step that includes contacting the material with a leaching solution that leaches arsenic from the material to form a pregnant liquor containing dissolved arsenic and a solid of a sulphide material of reduced arsenic content, and subsequently separating the solid from the pregnant liquor. The fresh leaching solution that is provided to the leaching step is an alkaline solution having a sulphide-containing compound present in an amount of from 0 to 1.0 times the amount of sulphur containing compound required to react with the arsenic present in the material.
    Type: Application
    Filed: October 19, 2011
    Publication date: January 16, 2014
    Inventors: David Nako, David Michael Way