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(11)    Patent No :    AP 2380    (73) Applicant(s)       
(21)    Application No :    AP/P/2007/004052    BASF AKTIENGESELLSCHAFT, 67056 Ludwigshafen,       
            Germany       
                   
(22)    Filing Date :    22.12.2005           
(24)    Date of Grant &    08.03.2012           
                   
(45)    Publication :

(30)  Priority Data    (72) Inventors

    (33) Country    (31) Number    (32) Date    SEELMANN-EGGEBERT Hans-Peter Dr., Germany   
    DE    10 2004 063    24.12.2004    OETTER Günter Dr., Germany   
        500.5           
                       
                BERASTAIN Arturo, Peru   
                et al       
                (74) Representative   
(84)    Designated State           
                   
    GH   T Z   ZW            KAPLAN & STRATTON ADVOCATES   
                   
(51)    International    Classification    C22B 15/00 (2006.01)    C22B 3/08 (2006.01)   



(54)    Title

Use of surfactants in the production of metal

(57)    Abstract

An aqueous sulfuric acid-containing composition which comprises at least one surfactant, and a process for extracting metal from metal-containing materials

with the aid of this aqueous sulfuric acid-containing composition are

(56)    Documents Cited :    US 4 080 419 A    EP 0 536 914    WO 92/17614 A

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