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Machine translation
1. (WO2003076671) METHODS TO REDUCE HYDROSULPHIDE AND ARSINE EMISSIONS DURING WET ORE PROCESSING
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2003/076671    International Application No.:    PCT/US2003/006432
Publication Date: 18.09.2003 International Filing Date: 03.03.2003
Chapter 2 Demand Filed:    24.09.2003    
IPC:
C01G 35/00 (2006.01), C22B 1/00 (2006.01), C22B 3/10 (2006.01), C22B 34/24 (2006.01)
Applicants: CABOT CORPORATION [US/US]; Two Seaport Lane, Suite 1300, Boston, MA 02210-2019 (US)
Inventors: HARD, Robert, A.; (US)
Agent: LANDO, Michelle, B.; Cabot Corporation, 157 Concord Road, Billerica, MA 01821-7001 (US)
Priority Data:
10/091,377 04.03.2002 US
Title (EN) METHODS TO REDUCE HYDROSULPHIDE AND ARSINE EMISSIONS DURING WET ORE PROCESSING
(FR) PROCEDES DESTINES A REDUIRE LES EMISSIONS DE SULFURE D'HYDROGENE ET D'ARSINE PENDANT UN TRAITEMENT DE MINERAI PAR VOIE HUMIDE
Abstract: front page image
(EN)Methods to control hydrogen sulfide and/or arsine emissions are described. The method involves adding at least one copper compound (such as a copper (II) compound) to the material, such as material containing sulfur in a sufficient amount to control said emissions. The material that is treated with the copper compound(s) is preferably an ore, such as a valve metal containing ore, such as tantalum-bearing ore. More in particular, the method involves adding copper oxide during the digestion of Ta ore material with hydrofludic acid.
(FR)L'invention concerne des procédés destinés à contrôler les émission de sulfure d'hydrogène et/ou d'arsine. Ce procédé consiste à ajouter au moins un composé de cuivre (tel qu'un composé de cuivre (II)) à une matière, telle qu'une matière contenant du soufre, en quantité suffisante pour contrôler lesdites émissions. La matière traitée avec ce ou ces composé(s) de cuivre est de préférence un minerai, tel qu'un minerai contenant du tantale. Plus particulièrement, ce procédé consiste à ajouter de l'oxyde de cuivre pendant la digestion d'une matière de minerai contenant du Ta avec de l'acide hydrofluorique.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, 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, 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, HU, IE, IT, LU, MC, NL, 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)