Method of producing a higher-purity metal

Details Method of producing a higher-purity metal Method of producing a higher-purity metal

2005-05-24

2005-05-24

Phasge, Arun S (Department: 1753)

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Preparing single metal

C205S563000, C205S564000, C205S565000, C205S571000, C205S572000, C205S573000, C205S574000, C205S584000, C205S597000, C205S602000, C205S610000

Reexamination Certificate

active

06896788

ABSTRACT:
A method of producing a higher purity metal comprising the step of electrolyzing a coarse metal material by a primary electrolysis to obtain a primary electrodeposited metal, the step of electrolyzing the material with the primary electrodeposited metal obtained in the primary electrolysis step used as an anode to obtain a higher purity electrolyte for secondary electrolysis, and the step of further performing secondary electrolysis by employing higher purity electrolytic solution than said electrolytic solution with said primary electrodeposited metal as an anode, whereby providing an electro-refining method that effectively uses electrodes and an electrolyte produced in a plurality of electro-refining steps, reuses the flow of an electrolyte in the system, reduces organic matter-caused oxygen content, and can effectively produce a high purity metal.

REFERENCES:
patent: 3049478 (1962-08-01), Morawietz
patent: 5393388 (1995-02-01), Herrmann et al.
patent: 6267827 (2001-07-01), Shindo et al.
patent: 02-185990 (1990-07-01), None
patent: 07-003486 (1995-01-01), None
patent: 11-335821 (1999-12-01), None
Patent Abstracts of Japan, one page English language Abstract for JP 07-003486, Jan. 1995.
Patent Abstracts of Japan, one page English language Abstract for JP 02-185990, Jul. 1990.
Patent Abstracts of Japan, one page English language Abstract for JP 11-335821, Dec. 1999.

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