	US 12,000,015 B2
	Method of improving gold recovery in a cyanide leaching circuit
Kirill N. Bakeev, Newark, DE (US)
Assigned to Solenis Technologies, L.P., Wilmington, DE (US)
Filed by SOLENIS TECHNOLOGIES, L.P., Wilmington, DE (US)
Filed on Mar. 30, 2021, as Appl. No. 17/216,789.
Claims priority of provisional application 63/001,615, filed on Mar. 30, 2020.
Prior Publication US 2021/0301371 A1, Sep. 30, 2021
Int. Cl. C22B 3/06 (2006.01); C22B 11/00 (2006.01)

CPC C22B 3/06 (2013.01) [C22B 11/04 (2013.01)]

20 Claims

1. A method of improving gold recovery in a cyanide leaching circuit comprising a gold ore slurry, said method comprising the steps of:

providing a gold recovery additive that is polyacrylic acid, wherein the additive has a weight average molecular weight of from about 500 to about 10,000 g/mol;

combining the gold recovery additive with the gold ore slurry in the cyanide leaching circuit, wherein the gold recovery additive is present in an amount of from about 10 to about 1000 g per ton of dry gold ore to improve the recovery of gold from the gold ore slurry.