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Pub. No.:    WO/2003/054238    International Application No.:    PCT/IB2002/005556
Publication Date: 03.07.2003 International Filing Date: 20.12.2002
Chapter 2 Demand Filed:    26.06.2003    
C22B 3/00 (2006.01), C22B 23/00 (2006.01)
Applicants: CONGO MINERAL DEVELOPMENTS LTD [GB/GB]; 49 Main Street, Road Town, Tortola (VG) (For All Designated States Except US).
ANGLO OPERATIONS LTD [ZA/ZA]; 55 Marshall Street, 2001 Johannesburg (ZA) (For All Designated States Except US).
LUNT, David, John [AU/AU]; (AU) (For US Only).
PRYOR, Bernard, Robert [GB/GB]; (GB) (For US Only).
COLETTE, Francois, Ferdinand, Joseph [MC/MC]; (MC) (For US Only).
WHYTE, Rodney, Murison [ZA/ZA]; (ZA) (For US Only).
MANN, Jeremy, Wilson [ZA/ZA]; (ZA) (For US Only).
ALEXANDER, Douglas [ZA/ZA]; (ZA) (For US Only).
RAMSAY, Allen, Graham [ZA/ZA]; (ZA) (For US Only).
CORTES, Gustavo, Adolfo, Tapia [CL/CL]; (CL) (For US Only)
Inventors: LUNT, David, John; (AU).
PRYOR, Bernard, Robert; (GB).
COLETTE, Francois, Ferdinand, Joseph; (MC).
WHYTE, Rodney, Murison; (ZA).
MANN, Jeremy, Wilson; (ZA).
ALEXANDER, Douglas; (ZA).
RAMSAY, Allen, Graham; (ZA).
CORTES, Gustavo, Adolfo, Tapia; (CL)
Agent: COCHRANE, David, Hylton; Spoor and Fisher, PO Box 41312, 2024 Craighall (ZA)
Priority Data:
2001/10512 21.12.2001 ZA
Abstract: front page image
(EN)This invention relates to a method of removing iron and manganese values and recovering cobalt values from a solution containing iron values, manganese values, cobalt values, and optionally other metal values. The method includes the step of introducing into the solution a gas mixture of sulphur dioxide and air or sulphur dioxide and oxygen so as in a single step to oxidise the iron values from the ferrous to the ferric state and to oxidise the manganese values from the manganous to the manganic state and then to precipitate the iron values as ferric oxide/hydroxide and to precipitate the manganese values as manganic oxide, leaving the cobalt values in solution.
(FR)L'invention porte sur un procédé permettant d'ôter des valeurs de fer et de manganèse et de récupérer des valeurs de cobalt d'une solution contenant des valeurs de fer, des valeurs de manganèse, des valeurs de cobalt, et, facultativement, des valeurs d'autres métaux. Ce procédé consiste à introduire dans la solution un mélange gazeux de dioxyde de soufre et d'air ou de dioxyde de soufre et d'oxygène afin d'oxyder, en une seule étape, les valeurs de fer de l'état ferreux à l'état ferrique et d'oxyder les valeurs de manganèse de l'état manganeux à l'état manganique puis à précipiter les valeurs de fer en tant qu'oxyde/hydroxyde ferrique et à précipiter les valeurs de manganèse en tant qu'oxyde manganique, en laissant les valeurs de cobalt dans la solution.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, OM, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)