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US 4,765,827 AGranted
Metal value recovery
AssigneeEnsci, Inc.
InventorsThomas J. Clough, John W. Sibert, Arthur C. Riese
Life of this patent
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AssigneeEnsci, Inc.
InventorsThomas J. Clough, John W. Sibert, Arthur C. Riese
Estimating the term…
A process for at least one of (1) recovering at least one first metal other than manganese from a first ore containing reducible manganese, and (2) recovering at least one second metal from a second ore containing the second metal and at least one metal sulfide of a metal other than the second metal and manganese; the process comprising at least one of: (A) contacting the first ore with an aqueous composition and a material containing at least one metal sulfide in the presence of a metal redox couple more positive than about +0.1 versus the standard hydrogen electrode, W. M. Latimer convention, at conditions effective to (1) chemically reduce at least a portion of the manganese, (2) oxidize at least a portion of the metal and/or the sulfide from the metal sulfide, and (3) at least partially liberate the first metal from the first ore, and recovering the first metal from the first ore; and (B) contacting the second ore with an aqueous composition and at least one reducible manganese-containing material in the presence of a metal redox couple more positive than about +0.1 versus the standard hydrogen electrode, W. M. Latimer convention, at conditions effective to (1) chemically reduce at least a portion of the manganese, (2) oxidize at least a portion of the metal and/or the sulfide from the metal sulfide, and (3) at least partially liberate the second metal from the second ore, and recovering the second metal from the second ore.
A process for recovering silver from an ore containing reducible manganese comprising contacting said ore with an aqueous composition and a material containing at least one metal sulfide in the presence of a metal redox couple more positive than about +0.1 versus the standard hydrogen electrode, W. M. Latimer convention, at conditions effective to (1) chemically reduce said manganese, (2) oxidize at least one of said metal from said metal sulfide and said sulfide from said metal sulfide, and (3) liberate said silver from said ore, said redox couple being selected from the group consisting of (A) at least one iron complexing agent in an amount effective to promote the oxidation of at least one of said metal and said sulfide from said metal sulfide, (B) at least one vanadium component in which vanadium is present in an amount in the 5+ oxidation state effective to promote the oxidation of at least one of said metal and said sulfide from said metal sulfide, and mixtures thereof;
A process for recovering at least one first metal selected from the group consisting of gold, silver, the platinum group metals and mixtures thereof from a ore containing said first metal and at least one metal sulfide of a metal other that manganese, said process comprising contacting said ore with an aqueous composition and at least one reducible manganese-containing material in the presence of a metal redox couple more positive than about +0.1 versus the standard hydrogen electrode, W. M. Latimer convention, at conditions effective to (1) chemically reduce said manganese, (2) oxidize at least one of said metal and said sulfide from said metal sulfide, and (3) liberate said first metal from said ore, said redox couple being selected from the group consisting of (A) at least one iron complexing agent in an amount effective to promote the oxidation of at least one of said metal and said sulfide from said metal sulfide, (B) at least one vanadium component in which vanadium is present in an amount in the 5+ oxidation state effective to promote the oxidation of at least one of said metal and said sulfide from said metal sulfide, and mixtures thereof;
Dependencies are inferred from the claim text.