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(11)    Patent No :    AP 2027    (73) Applicant(s)       
(21)    Application No :    AP/P/2007/003964    H.C. STARCK GmbH, Im Schleeke 78-91, 38642 Goslar,       
            Germany       
                   
(22)    Filing Date :    24.09.2005           
(24)    Date of Grant &    13.08.2009           
                   
(45)    Publication :

(30)    Priority Data            (72) Inventors   
    (33) Country    (31) Number    (32) Date    HAAS Helmut, Germany   
    DE    102004049039.2 08.10.2004    BARTMANN Ulrich, Germany   
                   
                SCHNITTER Christoph, Germany   
                et al       
                (74) Representative   
(84)    Designated State           
                   
    MZ            HONEY & BLANCKENBERG   
                   
(51)    International    Classification    C22B 34/24 (2006.01)    H01G 9/05 (2006.01)   
            B22F 1/00 (2006.01)    B22F 9/02 (2006.01)   
            C22B 5/04 (2006.01)    C22B 9/00 (2006.01)   
            C22B 9/05 (2006.01)       

(54)    Title

Method for the production of valve metal powders.

(57)    Abstract

The present invention relates to a process for the deoxidation of valve metal primary powders by means of reducing metals and/or metal hydrides, and a process for the production of tantalum powders that are suitable for electrolytic capacitors.


(56)    Documents Cited :    US 6 558 447 A   US 6 051 326 A

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