Processes to recoverand reconcentrate gold from its ores

Details Processes to recoverand reconcentrate gold from its ores Processes to recoverand reconcentrate gold from its ores

C - Chemistry, Metallurgy

22

B

53/18, 53/226

C22B 3/18 (2006.01) C22B 11/08 (2006.01)

Patent

CA 2030900

Processes To Recover And Reconcentrate Gold From Its Ores Abstract A variety of processes for recovering gold from gold ore are disclosed. Briefly, the methods include culturing at least one microorganism species capable of producing cyanide ion under conditions wherein the micro- organism produces cyanide ion, thus forming a cyanide ion- containing culture; contacting the cyanide ion-containing culture with gold ore, causing production of gold ion- cyanide ion complexes and biosorption of said complexes to said cultures; and recovering gold from the culture. The invention may be practiced with a variety of micro- organisms, including Chromobacterium violaceum and Chlorella vulgaris.

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