Process for recovery of copper from copper-containing chloride media

Patent metadata

Field	Value
Publication number	US-9234259-B2
Application number	US-34915509-A
Country	US
Kind code	B2
Filing date	Jan 6, 2009
Priority date	Aug 11, 2008
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

A process for recovering copper from an acid aqueous solution containing cupric chlorides and alkali metal and/or alkali earth metal chlorides by a solvent extraction with a cation-exchange extractant, comprising the step of processing a solvent extraction in the presence of sulfate ions.

First claim

What is claimed is:

1. A process for recovering copper from an acid aqueous solution containing cupric chlorides, bromine ions, and alkali metal and/or alkali earth metal chlorides by a solvent extraction with a cation-exchange extractant, comprising the step of processing a solvent extraction in the presence of sulfate ions, wherein from about 10 to about 100 g/L of the sulfate ions are included in the acid aqueous solution, wherein the acid aqueous solution is prepared by the following process:
producing a leaching solution comprising bromine ions, alkali metal and/or alkali earth metal chlorides, and cupric chloride and/or ferric chloride;
1) leaching copper from copper ores or copper concentrates with the leaching solution to make a post-leaching solution and residues;
2) and then separating the post-leaching solution from the residues by a solid-liquid separation to obtain the acid aqueous solution.

2. The process of claim 1 , wherein the sulfate ions derives from a sulfate compound added to the acid aqueous solution.

3. The process of claim 2 , wherein the sulfate compound is one or more species selected from the group consisting of sodium sulfate, magnesium sulfate, calcium sulfate, potassium sulfate and ammonium sulfate.

4. The process of claim 1 , wherein a concentration of the chloride ions in the acid aqueous solution is from about 120 to about 200 g/L.

5. The process of claim 1 , wherein a total concentration of the chloride ions and the bromide ions in the acid aqueous solution is from about 120 to about 200 g/L.

6. The process of claim 1 , wherein the cation-exchange extractant is an acidic chelate extractant.

Assignees

• Abe Yoshifumi
• Hosaka Hiroshi
• Takebayashi Kazuaki
• Yoshimura Akira
• Nakamura Takeshi
• Jx Nippon Mining & Metals Corp

Inventors

• Abe Yoshifumi
• Hosaka Hiroshi
• Takebayashi Kazuaki
• Yoshimura Akira
• Nakamura Takeshi

Classifications

• C22B15/0069 Primary

  containing halogen · CPC title

• C22B3/44

  by chemical processes (treatment or purification of solutions by liquid-liquid extraction C22B3/26, by ion-exchange extraction C22B3/42) · CPC title

• C22B3/08

  Sulfuric acid {, other sulfurated acids or salts thereof} · CPC title

• C22B3/10

  Hydrochloric acid {, other halogenated acids or salts thereof} · CPC title

• C22B15/0089

  by chemical methods · CPC title