Process for the dissolution of copper metal
OwnerH. Wayne Richardson, Gang Zhaoinventors
Life of this patent
Estimating the term…
Abstract
A method of dissolving a copper mass includes contacting a copper mass with an oxidant such as air and an aqueous leach liquor containing monoethanolamine (“MEA”) and (HMEA)2CO3, wherein said leach liquor is produced by partially carbonating the MEA, and said leach liquor further contains between 1.9 g/L and 13.7 g/L of dissolved copper, forms a liquid product comprising between 100 and 130 g Cu/L in 48 hours or less.
Claims13
A method of dissolving a copper mass, comprising contacting a copper mass with an oxidant and an aqueous leach liquor containing monoethanolamine (“MEA”) and (HMEA)2CO3, wherein said leach liquor is produced by partially carbonating the MEA, and said leach liquor further contains at least 1.9 g/L of dissolved copper.
A method of dissolving a copper mass, comprising contacting a copper mass with an oxidant and an aqueous leach liquor containing monoethanolamine (“MEA”) and (HMEA)2CO3, wherein said leach liquor is produced by partially carbonating the MEA and further contains between 1.9 g/L and 13.7 g/L of dissolved copper, thereby forming a liquid product comprising between 100 and 130 g Cu/L in 48 hours or less.
Dependencies are inferred from the claim text.