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US 11,111,559 B2Granted
Process for recovering precious metals from clay-containing ores
AssigneeEthox Chemicals, LLC
InventorsCharles F. Palmer, Jr., John W. McKiernan, Charles F. Palmer, III
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Abstract
A solution for leaching metals from clay containing ore and a method of leaching ore is described. The solution comprises a cyanide; a wetting agent; and a clay stabilizing polymer.
Claims29
A method for heap leaching of precious metal from day containing ore comprising:
- forming a heap of ore on a leach bed;
- percolating a leach solution through said heap wherein said leach solution comprises:
- cyanide;
- a wetting agent;
- and
- a clay stabilizing polymer wherein said clay stabilizing polymer is selected from the group consisting of a polyalkylene oxide copolymer, a propoxylated glycol and a polyamine copolymer;
- thereby forming a pregnant leach solution comprising said precious metal;
- and
- removing said precious metal from said pregnant leach solution.
6 more elements
A method for heap leaching of precious metal from day containing ore comprising:
- forming a heap of ore on a leach bed;
- percolating a leach solution through said heap wherein said leach solution comprises:
- cyanide;
- a wetting agent;
- and
- a clay stabilizing polymer;
- thereby forming a pregnant leach solution comprising said precious metal;
- and
- removing said precious metal from said pregnant leach solution;
- and
- wherein said wetting agent is selected from the group consisting of alcohol ethoxylates;
- polyethylene glycol esters, hydrophilic modified silicones, and fatty amine ethoxylates.
9 more elements
Dependencies are inferred from the claim text.