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(11)    Patent No :    AP 2571   
(21)    Application No :    AP/P/2009/004750   
(22)    Filing Date :    14.11.2003   
(24)    Date of Grant &    23.01.2013   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
US    60/426,343    15.11.2002
US    10/713,640    13.11.2003

(84)    Designated State

BW    GM  GH   KE   LS   MW  MZ   NA   SL

SD    SZ   T Z   UG   ZM   ZW
 
(73) Applicant(s)

PLACER DOME TECHNICAL SERVICES LIMITED, Suite

1600-1055 Dunsmuir Street, Vancouver, British Columbia
V7X 1P1,

Canada
(72) Inventors

HACKL Ralph Peter, Canada

JI Jinxing, Canada

WEST-SELLS Paul George, Canada
et al
(74) Representative

HONEY & BLANCKENBERG
 
(51)  International  Classification   C01G    5/00 (2006.01)    C01G 7/00 (2006.01)
C01G    55/00 (2006.01)   

(54)    Title
Method for thiosulfate leaching of precious metal-containing materials
57)    Abstract
Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ heap leaching

or lixiviants that include one or more blinding agents

(56)    Documents Cited :    WO 01/88212 A   US 4 778 519 A

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