Method for recovering at least one valuable containing tungsten

Patent metadata

Field	Value
Publication number	US-2018087166-A1
Application number	US-201615563112-A
Country	US
Kind code	A1
Filing date	Mar 30, 2016
Priority date	Mar 31, 2015
Publication date	Mar 29, 2018
Grant date	—

Abstract

Provided is a method for efficiently separating and recovering tungsten and other valuable(s) from at least one valuable containing tungsten. The present invention relates to a method for recovering at least one valuable containing tungsten, comprising subjecting a raw material mixture comprising at least one valuable containing tungsten to electrolysis using an electrolytic solution containing at least one alcohol amine to dissolve tungsten in the electrolytic solution, electrodeposit a part of the valuable(s) onto a cathode used for the electrolysis and separate at least one valuable other than the valuable(s) electrodeposited onto the cathode as a residue in the electrolytic solution, and then separating and recovering each of the residue and the valuable(s) electrodeposited onto the cathode.

First claim

1 . A method for recovering at least one valuable containing tungsten, comprising subjecting a raw material mixture comprising at least one valuable containing tungsten to electrolysis using an electrolytic solution containing at least one alcohol amine to dissolve tungsten in the electrolytic solution, electrodeposit a part of the valuable(s) onto a cathode used for the electrolysis and separate at least one valuable other than the valuable(s) electrodeposited onto the cathode as a residue in the electrolytic solution, and then separating and recovering each of the residue and the valuable(s) electrodeposited onto the cathode.

2 . The method for recovering the at least one valuable containing tungsten according to claim 1 , wherein the valuable(s) to be electrodeposited onto the cathode used for the electrolysis is one or more selected from the group consisting of cobalt, nickel, iron, chromium and vanadium.

3 . The method for recovering the at least one valuable containing tungsten according to claim 2 , wherein the cathode used for the electrolysis is formed of titanium, stainless steel, iridium, niobium or zirconium.

4 . The method for recovering the at least one valuable containing tungsten according to claim 1 , wherein the at least one valuable that is the residue in the electrolytic solution is one or more selected from the group consisting of titanium, tantalum and silica.

5 . The method for recovering the at least one valuable containing tungsten according to claim 1 , wherein the at least one alcohol amine is monoethanolamine and/or triethanolamine.

6 . The method for recovering the at least one valuable containing tungsten according to claim 1 , wherein a concentration of the alcohol amine in the electrolytic solution is from 1 to 80% by mass.

7 . The method for recovering the at least one valuable containing tungsten according to claim 1 , wherein the raw material mixture contains from 1 to 30% by mass of at least one valuable other than tungsten.

8 . The method for recovering the at least one valuable containing tungsten according to claim 7 , wherein the raw material mixture contains from 1 to 10% by mass of at least one valuable other than tungsten.

9 . The method for recovering the at least one valuable containing tungsten according to claim 8 , wherein the raw material mixture contains from 3 to 10% by mass of at least one valuable other than tungsten.

10 . The method for recovering the at least one valuable containing tungsten according to claim 1 , wherein the electrolysis is carried out by adjusting a temperature of the electrolytic solution to 20 to 80° C.

11 . The method for recovering the at least one valuable containing tungsten according to claim 1 , wherein the electrolytic solution has a pH of 9 or more.

12 . The method for recovering the at least one valuable containing tungsten according to claim 1 , wherein an anode used for the electrolysis is a titanium basket provided with the raw material mixture comprising the at least one valuable containing tungsten.

13 . The method for recovering the at least one valuable containing tungsten according to claim 1 , wherein separation efficiency Co/W of cobalt Co in the valuable(s) deposited onto the cathode to tungsten W is 100 or more.

14 . The method for recovering the at least one valuable containing tungsten according to claim 2 , wherein the at least one valuable that is the residue in the electrolytic solution is one or more selected from the group consisting of titanium, tantalum and silica.

15 . The method for recovering the at least one valuable containing tungsten according to claim 3 , wherein the at least one valuable that is the residue in the electrolytic solution is one or more selected from the group consisting of titanium, tantalum and silica.

16 . The method for recovering the at least one valuable containing tungsten according to claim 2 , wherein the at least one alcohol amine is monoethanolamine and/or triethanolamine.

17 . The method for recovering the at least one valuable containing tungsten according to claim 3 , wherein the at least one alcohol amine is monoethanolamine and/or triethanolamine.

18 . The method for recovering the at least one valuable containing tungsten according to claim 4 , wherein the at least one alcohol amine is monoethanolamine and/or triethanolamine.

19 . The method for recovering the at least one valuable containing tungsten according to claim 2 , wherein a concentration of the alcohol amine in the electrolytic solution is from 1 to 80% by mass.

20 . The method for recovering the at least one valuable containing tungsten according to claim 3 , wherein a concentration of the alcohol amine in the electrolytic solution is from 1 to 80% by mass.

Assignees

• Jx Nippon Mining & Metals Corp

Inventors

• Kawamura Toshifumi

Classifications

• C25C1/10

  of chromium or manganese · CPC title

• C22B34/36

  Obtaining tungsten · CPC title

• C25C1/06

  or iron group metals, refractory metals or manganese · CPC title

• C25C1/08 Primary

  of nickel or cobalt · CPC title

• C01G41/006

  Compounds containing tungsten, with or without oxygen or hydrogen, and containing two or more other elements · CPC title