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1. (WO1997005294) METHOD OF PURIFYING GOLD
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1997/005294    International Application No.:    PCT/CA1996/000493
Publication Date: 13.02.1997 International Filing Date: 19.07.1996
Chapter 2 Demand Filed:    18.02.1997    
IPC:
C22B 7/00 (2006.01), C22B 11/00 (2006.01), C22B 11/02 (2006.01)
Applicants: PROTIUM METALS INC. [CA/CA]; 906-569 Sheppard Avenue, West, North York, Ontario M3H 2R8 (CA) (For All Designated States Except US).
HANNA, Mourad, Michael [CA/CA]; (CA) (For US Only).
LAKSHMANAN, Vaikuntam, Iyer [CA/CA]; (CA) (For US Only).
RISHEA, Marc, Murray [CA/CA]; (CA) (For US Only).
TACKABERRY, Patrick, Donald [CA/CA]; (CA) (For US Only)
Inventors: HANNA, Mourad, Michael; (CA).
LAKSHMANAN, Vaikuntam, Iyer; (CA).
RISHEA, Marc, Murray; (CA).
TACKABERRY, Patrick, Donald; (CA)
Agent: GALLOWAY, Warren, John; Sim & McBurney, 6th floor, 330 University Avenue, Toronto, Ontario M5G 1R7 (CA)
Priority Data:
2,154,608 25.07.1995 CA
9609520.3 08.05.1996 GB
Title (EN) METHOD OF PURIFYING GOLD
(FR) PROCEDE DE PURIFICATION DE L'OR
Abstract: front page image
(EN)The present invention is a method of increasing the gold content of metallic gold comprising the step of exposing the metallic gold composition to a leach liquor. The leach liquor is selected to dissolve the impurities from the metallic gold composition without dissolving a significant amount of the gold metal. Preferably, the leach liquor is a solution having a highly acidic dissociation constant, a high oxidative potential and a high tendency to complex cations. The present method preferably includes the steps of roasting the gold in an oxidizing atmosphere or atomization before leaching. The metallic gold composition may be repeatedly roasted and leached until the desired gold purity is obtained.
(FR)Procédé permettant d'augmenter la teneur en or de l'or métallique, consistant à mettre la composition d'or métallique en contact avec une liqueur lixiviante. La liqueur lixiviante est adaptée pour dissoudre les impuretés de la composition d'or métallique sans dissoudre en quantité significative l'or. De préférence, la liqueur lixiviante est une solution présentant une constante de dissociation fortement acide, un potentiel d'oxydation élevé et une forte tendance à la complexion des cations. Le procédé décrit consiste de préférence à griller l'or en atmosphère oxydante ou à l'atomiser avec lixiviation. La composition d'or métallique peut être grillée et lixiviée à plusieurs reprises jusqu'à obtention de la pureté d'or voulue.
Designated States: AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN.
African Regional Intellectual Property Organization (KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)