official journal of the patent office - Controller General of Patents ...

(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) Application No.: 01335/KOLNP/2005 A
(22) Date of filing of Application: 11/07/2005 (43) Publication Date: 09/06/2006
(54) Title of the invention: RECOVERING METALS FROM SULFIDIC MATERIALS
(51) International classification : C22B 3/06
3/10,11/00
(31) Priority Document No : 2002953566
(32) Priority Date : 21/12/2002
(33) Name of priority country : AU
(86) International Application No and : PCT/AU03/001700
Filing Date
: 19/12/2003
(87) International Publication No : WO 04/059018 A1
(61) Patent of addition to Application No : NIL
Filed on : N.A.
(62) Divisional to Application No : NIL
Filed on : N.A.
(57) Abstract:
(71) Name of Applicant:
INTEC LTD
Address of the Applicant:
GORDON CHIU BUILDING J 01 MAZE
CRESENT SYDNEY UNIVERSITY SYDNEY
NEW SOUTH WALS 2006 AUSTRALIA
(72) Name of the Inventor:
MOYES JOHN
HOULLIS FRANK
Filed U/S 5(2) before The Patents (Amendment)
Act, 2005: NO
A process for recovering a precious metal from a sulfidic material comprises the steps of preparing an acidic aqueous halide solution
having an oxidation potential sufficient to oxidise the sulfidic material and render the precious metal soluble in the solution, adding the
material to the acidic aqueous halide solution so that the sulfidic material is oxidised and the precious metal is solubilised and separating
the precious metal from the oxidised sulfidic material. In addition, a process for removing a contaminant from a contaminated sulfidic
material comprises the steps of mixing the material in an aqueous solution wherein a multi-valent species of a relatively high oxidation
state oxidises the contaminant to render it soluble in the solution, produces a contaminant refined material, and is reduced to a relatively
lower oxidation state; and removing the contaminant from the solution whilst regenerating the multi-valent species to its relatively high
oxidation state.
(FIG. -2)
The Patent Office Journal 09/06/2006 11090