The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2014
Filed:
Oct. 19, 2011
David Nakon, Richlands, AU;
David Michael Way, Kenmore, AU;
David Nakon, Richlands, AU;
David Michael Way, Kenmore, AU;
Xstrata Queensland Limited, Brisbane, AU;
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.