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Pub. No.:    WO/2009/066308    International Application No.:    PCT/IN2008/000442
Publication Date: 28.05.2009 International Filing Date: 09.07.2008
C22B 3/12 (2006.01), C01F 7/06 (2006.01), C01F 7/08 (2006.01), C22B 21/00 (2006.01), C22B 1/14 (2006.01)
Applicants: ADITYA BIRLA SCIENCE & TECHNOLOGY CO. LTD [IN/IN]; Aditya Birla Centre, 2nd Floor, C Wing, S.K.Ahire Marg, Worli, Mumbai-400 025 Maharashtra (IN).
HINDALCO INDUSTRIES LTD. [IN/IN]; Century Bhavan, 3rd Floor Dr. Annie Besant Road Worli Mumbai 400 030 Maharashtra (IN)
Inventors: PURI PRASHANT, Mickey; (IN).
KULKARNI, Sadguru; (IN).
MOHAPATRA, Sanjaya; (IN).
SAMDANI, Anant; (IN).
JADHAV, Rahul; (IN).
KAPSE, Mayur; (IN).
SALVI, Seema; (IN)
Agent: DEWAN, Mohan; R.K. Dewan & Company, Podar Chambers, S.A. Brelivi Road, Fort, Mumbai 400 001, Maharashtra (IN)
Priority Data:
1314/MUM/2007 09.07.2007 IN
Abstract: front page image
(EN)A process for extraction of alumina from aluminum containing ores is disclosed. The process comprises the following steps, determining the alumina and silica content in the ore; treating the ore with caustic and heat, leaching the intermediate mass so produced with water to obtain a filtrate containing aluminate and silicate, vanadate and other soluble impurities; separating silicate and vanadate and other impurities as residue from the filtrate to obtain beneficiated aluminate liquor; and extracting alumina from the beneficiated aluminate liquor by a conventional method.
(FR)L'invention concerne un procédé pour l'extraction d'alumine à partir de minerais contenant de l'aluminium. Le procédé comprend les étapes consistant à déterminer la teneur en alumine et en silice dans le minerai; traiter le minerai avec de la soude caustique et de la chaleur; lixivier la masse intermédiaire ainsi produite avec de l'eau pour obtenir un filtrat contenant de l'aluminate et du silicate, du vanadate et d'autres impuretés solubles; séparer du filtrat le silicate et le vanadate et les autres impuretés sous la forme de résidu pour obtenir une liqueur concentrée d'aluminate; et extraire l'alumine de la liqueur concentrée d'aluminate par un procédé classique.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, 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, HR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, NO, PL, PT, RO, 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)