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(11)    Patent No :    AP 2236    (73) Applicant(s)       
(21)    Application No :    AP/P/2007/004154    CYTEC TECHNOLOGY CORP., 300 Delaware Avenue,       
            Wilmington, DE 19801,       
                   
(22)    Filing Date :    23.03.2006    United States of America       
(24)    Date of Grant &    23.05.2011           
                   
(45)    Publication :

(30)  Priority Data    (72) Inventors

    (33) Country    (31) Number    (32) Date    TINKLER Owen Stewart, United States of America   
    US    60/666,030    29.03.2005    CRAMER Keith Alan, United States of America   
                   
                TETLOW Peter Eric, United States of America   
                et al       
                (74) Representative   
(84)    Designated State           
                   
    BW  ZM   ZW            HONEY & BLANCKENBERG   
                   
(51)    International    Classification    C22B15/00(2006.01)    C22B3/30 (2006.01)   


(54)    Title

Modification of copper/iron selectivity in copper solvent extraction systems

(57)    Abstract

A solvent extraction composition for the recovery of metals, particularly copper and iron, from leach solutions, comprises one or more orthohydroxyarylaldoximes and/or one or more orthohydroxyarylketoximes, and one or more selectivity modifiers consisting of phosphinic and/or phosphonic acids, and salts and esters therefore and optionally one or more equilibrium modifiers is provided. The solvent extractant formulation enables to achieve controlled respectively desired metal transfer ratio's.

(56)    Documents Cited :    Patent Abstracts of Japan vo. 018, No. 668 (c-1289), 16.12.94 & JP 06 264 156    Patent

Abstracts of Japan vol.2003, No. 12, 05.12.03 & JP 04 307983

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