Patent ID: 8003066
Filing Date: 2011-08-23
Classification: C01G

Abstract:
1. A method for scrubbing an extractant in hydrometallurgy of a non-ferrous metal, which comprises steps in the following order: providing an extractant, for non-ferrous metals, in the form of amine extractant (A) comprising an amine compound, wherein said amine compound comprises a mixture of: (i) hydrochloride of said amine compound, and (ii) a salt of said amine compound with a metal chloro complex ion, wherein said amine compound is at least one kind of tertiary amine selected from the group consisting of Tri-n-octylamine (TNOA) and Tri-i-octylamine (TIOA); contacting said amine extractant (A) with a sulfuric acid solution with a concentration of 3 to 10 N to thereby form amine extractant (B) in which said hydrochloride (i) is converted to sulfate of said amine compound; and contacting said amine extractant (B) with water to thereby eliminate a metal from said metal chloro complex ion in said salt (ii).