Patent attributes
A method of obtaining copper from feedstock includes: providing feedstock into acid solution including chloride and bromide of one of alkali metal and alkali earth metal, and one of chloride of copper and iron and bromide of copper and iron; leaching monovalent copper and divalent copper with use of oxidizing power of at least one of iron ion and copper ion, with air being blown into the acid solution under an atmospheric pressure at a temperature less than a boiling point of the acid solution; solid-liquid separating the acid solution; blowing air into the solution; oxidizing copper in the solution; coprecipitating iron and impurity; extracting copper from the solution from which deposition including the coprecipitate is separated; obtaining the extracted copper into sulfuric acid solution as copper sulfate; obtaining copper from the copper sulfate; and recycling hydrochloric acid generated in the extracting in another copper leaching.
