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Machine translation
1. (WO2003002460) PROCESS FOR REMOVING SODIUM SULFATE FROM NICKEL HYDROXIDE EFFLUENT STREAMS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2003/002460    International Application No.:    PCT/CA2002/000536
Publication Date: 09.01.2003 International Filing Date: 18.04.2002
IPC:
C01D 5/00 (2006.01), C01G 53/04 (2006.01), C02F 1/22 (2006.01)
Applicants: INCO LIMITED [CA/CA]; Suite 1500 145 King Street West Toronto, Ontario M5H 4B7 (CA)
Inventors: BABJAK, Juraj; (CA).
ZOU, Feng; (CA)
Agent: WHEELER, Michael, E.; Smart & Biggar P.O. Box 2999, Station D 900-55 Metcalfe Street Ottawa, Ontario K1P 5Y6 (CA)
Priority Data:
09/896,806 29.06.2001 US
Title (EN) PROCESS FOR REMOVING SODIUM SULFATE FROM NICKEL HYDROXIDE EFFLUENT STREAMS
(FR) PROCEDE D'ELIMINATION DE SULFATE DE SODIUM DANS DES EFFLUENTS D'HYDROXYDE DE NICKEL
Abstract: front page image
(EN)A method for removing sodium sulfate from nickel and ammonia containing aqueous effluents. The effluents, typically from a nickel hydroxide production process, are cooled to or below 30°C to crystallize and precipitate the sodium sulfate and dewater the effluent. The sodium sulfate is retrieved and the remaining solution is recycled back to the nickel hydroxide production process.
(FR)L'invention concerne un procédé d'élimination de sulfate de sodium dans des effluents aqueux chargés de nickel et d'ammonium. Ces effluents, issus généralement d'un procédé de production d'hydroxyde de nickel, sont refroidis à 30 °C ou moins pour cristalliser et précipiter le sulfate de sodium et déshydrater les effluents. Après l'élimination du sulfate de sodium, le reste de la solution est réinjecté dans le processus de production d'hydroxyde de nickel.
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, SD, SE, SG, SI, SK, SL, TJ, TM, TN, TR, TT, TZ, UA, UG, UZ, 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, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, 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)