Title:
METHOD AND DEVICE FOR PRODUCING HIGH-PURITY METAL
Document Type and Number:
WIPO Patent Application WO/2003/097903
Kind Code:
A1
Abstract:
A method of producing a high-purity metal characterized by comprising the step of, when metal-containing solution is used as an electrolyte in electrolyzing, partitioning an anode from a cathode by an negative ion exchange membrane, intermittently or continuously extracting an anolyte for introduction into a solvent extraction tank, and intermittently or continuously introducing toward the cathode a high-purity metal electrolyte having impurities such as iron removed in the solvent extraction tank. A simple method of effecting electrolysis from a metal material containing large amounts of iron, carbon and oxygen by using a metal-containing solution, the method capable of efficiently producing a high-purity metal having a purity of at least 4N (99.99 wt.%) or at least 5N (99.999 wt.%).
Inventors:
SHINDO YUICHIRO (JP)
TAKEMOTO KOUICHI (JP)
TAKEMOTO KOUICHI (JP)
Application Number:
PCT/JP2003/001113
Publication Date:
November 27, 2003
Filing Date:
February 04, 2003
Export Citation:
Assignee:
NIKKO MATERIALS CO LTD (JP)
SHINDO YUICHIRO (JP)
TAKEMOTO KOUICHI (JP)
SHINDO YUICHIRO (JP)
TAKEMOTO KOUICHI (JP)
International Classes:
C22B3/26; C22B23/06; C25C7/06; C25C1/00; (IPC1-7): C25C1/00; C22B23/06
Domestic Patent References:
| WO1993020262A1 | 1993-10-14 |
Foreign References:
| JPS6431988A | 1989-02-02 | |||
| US4115222A | 1978-09-19 |
Attorney, Agent or Firm:
Ogoshi, Isamu (Office Toranomon 9 Mori Bldg. 3F, 2-2, Atago 1-chom, Minato-ku Tokyo, JP)
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