Methods to control H2S and arsine emissions
AssigneeCabot Corporation
InventorRobert A. Hard
Life of this patent
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Abstract
Methods to control hydrogen sulfide and/or arsine emissions are described. The method involves adding at least one copper compound (such as a copper(II) compound) to the material, such as material containing sulfur in a sufficient amount to control said emissions. The material that is treated with the copper compound(s) is preferably an ore, such as a valve metal containing ore.
Claims23
A method to control hydrogen sulfide or arsine emissions or both during the processing of ore comprising adding at least one copper compound to said ore in an amount sufficient to control said emissions.
A method to control hydrogen sulfide or arsine emissions or both during the digestion of tantalum bearing ore comprising adding at least one copper compound to said tantalum-bearing ore during said digestion.
A method to control hydrogen sulfide or arsine emissions or both during the processing of material containing sulfur comprising adding at least one copper compound to said material in an amount sufficient to control said emissions.
Dependencies are inferred from the claim text.