Global Patent Index - EP 2640861 A1

EP 2640861 A1 2013-09-25 - METHOD FOR THE LEACHING OF A METAL SULFIDE

Title (en)

METHOD FOR THE LEACHING OF A METAL SULFIDE

Title (de)

VERFAHREN ZUR LAUGUNG EINES METALLSULFIDS

Title (fr)

PROCÉDÉ POUR LA LIXIVIATION D'UN SULFURE MÉTALLIQUE

Publication

EP 2640861 A1 (EN)

Application

EP 11841689 A

Priority

  • AU 2010905134 A
  • AU 2011001487 W

Abstract (en)

[origin: WO2012065222A1] A method (10) for the leaching of a metal sulfide, the method characterised by the steps of: combining a metal sulfide (12) with water to form a slurry (13); directing the slurry (13) to an autoclave (14) for acid leaching at elevated temperature and pressure; adding an oxidant (16) to the autoclave (14); and adding a metal powder (18) to the autoclave (14), whereby the addition of the metal powder (18) reduces a residual acid concentration in a pregnant leach solution (20) that exits the autoclave (14).

IPC 8 full level (invention and additional information)

C22B 3/00 (2006.01); C22B 3/04 (2006.01); C22B 3/06 (2006.01); C22B 23/00 (2006.01)

CPC (invention and additional information)

C22B 3/06 (2013.01); C22B 23/0415 (2013.01); Y02P 10/234 (2015.11)

Citation (search report)

See references of WO 2012065222A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

EPO simple patent family

WO 2012065222 A1 20120524; AU 2011331911 A1 20130411; AU 2011331911 B2 20150319; BR 112013011808 A2 20160913; CA 2815563 A1 20120524; EP 2640861 A1 20130925

INPADOC legal status


2014-12-24 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20140603

2014-02-26 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) (DELETED)

2013-09-25 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20130410

2013-09-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR