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1. (WO2011146620) STRIPPING AGENT AND METHOD OF USE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2011/146620    International Application No.:    PCT/US2011/037002
Publication Date: 24.11.2011 International Filing Date: 18.05.2011
IPC:
B01D 61/12 (2006.01)
Applicants: BOARD OF REGENTS OF THE NEVADA SYSTEM OF HIGHER EDUCATION, on behalf of THE UNIVERSITY OF NEVADA, RENO [US/US]; Mail Stop 321 Ross Hall 218 Reno, NV 89557 (US) (For All Designated States Except US).
FUERSTENAU, Maurice, C. [US/US]; (US) (For US Only).
NESBITT, Carl, C. [US/US]; (US) (For US Only).
SEAL, Thomas, Joseph [US/US]; (US) (For US Only)
Inventors: FUERSTENAU, Maurice, C.; (US).
NESBITT, Carl, C.; (US).
SEAL, Thomas, Joseph; (US)
Agent: JACKSON, Randy, S.; Wood Herron & Evans, LLP 2700 Carew Tower 441 Vine Street Cincinnati, OH 45202-2917 (US)
Priority Data:
61/345,769 18.05.2010 US
61/417,133 24.11.2010 US
Title (EN) STRIPPING AGENT AND METHOD OF USE
(FR) AGENT DE DÉMONTAGE ET SON PROCÉDÉ D'UTILISATION
Abstract: front page image
(EN)A method of removing mercury adsorbed onto activated carbon is provided. The method includes treating an adsorbed mixture of metal cyanide complexes on a carbon substrate with an acidic solution of a stripping agent that is a weak acid. The method also eliminates inorganic sealants from the carbon substrate. In precious metal mining operations, the disclosed method reduces environmental emissions of mercury during the gold elution and carbon reactivation processes.
(FR)L'invention concerne un procédé d'élimination du mercure adsorbé sur du charbon actif. Le procédé comprend le traitement d'un mélange adsorbé de complexes de cyanure métallique sur un substrat carboné par une solution acide d'un agent de démontage qui est un acide faible. Le procédé permet également d'éliminer des produits d'étanchéité inorganiques à partir du substrat carboné. Dans des opérations d'extraction de métaux précieux, le procédé permet de réduire les émissions de mercure dans l'environnement au cours des processus d'élution de l'or et de réactivation du carbone.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, 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, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, 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 (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, 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)