ERIC HILL
Architects at Mcgrath Rd, Fairbanks, AK
License number
Alaska AELN12809
Issued Date
Dec 30, 2010
Effective Date
Dec 10, 2015
Expiration Date
Dec 31, 2017
Category
Architects, Engineers and Land Surveyors
Address
Address
1430 Mcgrath Rd, Fairbanks, AK 99712
Professional information
See more information about ERIC HILL at trustoria.com
Method Of Recovering Gold From The Fine Carbon Residue From A Coarse Carbon Gold Recovery Process
Method Of Recovering Gold From The Fine Carbon Residue From A Coarse Carbon Gold Recovery Process
US Patent:
6228334, May 8, 2001
Filed:
Dec 21, 1999
Appl. No.:
9/470313
Inventors:
Eric M. Hill - Fairbanks AK
Hsing Kuang Lin - Fairbanks AK
Hsing Kuang Lin - Fairbanks AK
International Classification:
B01D 1500, C22B 1100
US Classification:
423 25
Abstract:
A method for recovering gold from gold-loaded fine carbon residue from a coarse carbon gold recovery process is disclosed. The gold-loaded fine carbon residue is mixed with activated coarse carbon and an aqueous solution of a transfer reagent to form a slurry. In the slurry the reagent promotes transfer of gold from the fine carbon to the coarse carbon. After allowing time for the transfer, gold-loaded coarse carbon is separated from the slurry. Gold can then be recovered from the separated coarse carbon, for example by cyanide leaching followed by electrowinning. More gold can be recovered by adding further coarse carbon and repeating the transfer of gold to that coarse carbon. In one example 66% of gold was transferred from the fine carbon to the coarse carbon in one transfer cycle. About 89% and 96% of gold can be recovered after respectively second and third transfer cycles.