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(11)    Patent No :    AP 2318    (73) Applicant(s)       
(21)    Application No :    AP/P/2008/004374    OUTOTEC OYJ, Riihitontuntie 7, FI-02200 Espoo,       
            Finland       
                   
(22)    Filing Date :    03.10.2006           
(24)    Date of Grant &    04.11.2011           
                   
(45)    Publication :

(30)    Priority Data            (72) Inventors   
    (33) Country    (31) Number    (32) Date    HYVARINEN Olli, Finland   
    AU    2005905436    03.10.2005    KARONEN Janne, Finland   
                   
                HAAVANLAMMI Liisa, Finland   
                et al       
                (74) Representative   
(84)    Designated State           
                   
    BW  ZM   ZW            HONEY & BLANCKENBERG   
                   
(51)    International    Classification    C22B23/00 (2006.01)    C22B26/00 (2006.01)   
            C22B11/00(2006.01)       


(54)    Title

Method for processing nickel bearing raw material in chloride-based leaching

(57)    Abstract

The invention relates to a method for processing a nickel product from nickel-bearing sulphidic raw materials, such as nickel sulphide concentrate or ore. According to the invention, the raw material is leached in atmospheric conditions in an aqueous solution of sodium chloride and copper (II) chloride. The reagents needed for leaching nickel and for processing the products, such

as chlorine, hydrogen and sodium hydroxide, are obtained from chlorine-alkali electrolysis that is integrated as a step in the process.

(56)    Documents Cited :    US 2005 118081 A1    US 3975189 A    EP 1303641 B1

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