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(11)    Patent No :    AP 1924   

(73) Applicant(s)       
(21)    Application No :    AP/P/2007/003984    FREEPORT-MCMORAN CORPORATION, One North Central       
            Avenue, Phoenix, Arizona 85004-4464,       
                   
(22)    Filing Date :    13.12.2004    United States of America       
(24)    Date of Grant &    05.12.2008           
                   
(45)    Publication :

(30)  Priority Data    (72) Inventors

    (33) Country    (31) Number    (32) Date    BREWER Robert E, United States Of America   
    US    60/623,199    29.10.2004    ROBERTSON Joanna M, United States Of America   
                   
                MARSDEN John O, United States Of America   
                et al       
                (74) Representative   
(84)    Designated State           
                   
    ZM            ADAMS AND ADAMS MOZAMBIQUE   
                MOZAMBIQUE       
                   
(51)    International    Classification    C25C1/12 (2006.01)    C22B15/00 (2006.01)   


(54)    Title

Process for multiple stage direct electrowinning of copper.

(57)    Abstract

A system and process for recovering copper from a copper-containing ore, concentrate, or other copper-bearing material to produce high quality cathode

copper from a leach solution without the use of copper solvent/solution extraction techniques or apparatus. A process for recovering copper from a copper-containing ore generally includes the steps of providing a feed stream containing comminuted copper-containing ore, concentrate, or other copper-bearing material (101), leaching the feed stream to yield a copper-containing solution (1030), conditioning the copper-containing solution through one or more physical or chemical conditioning steps, and electrowinning copper directly from the copper-containing solution in multiple electrowinning stages (1070,1080), without subjecting the copper-containing


(56)    Documents Cited :    US 04/130076 A   US 4 066 520 A   US 5 622 615 A

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