Copper metal recovery system

Details Copper metal recovery system Copper metal recovery system

2008-04-01

2008-04-01

Hruskoci, Peter A. (Department: 1797)

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

C210S724000, C210S737000, C210S912000, C210S919000, C216S093000, C423S027000, C423S035000, C423S043000

Reexamination Certificate

active

11111238

ABSTRACT:
The present invention generally relates to a copper metal recovery system, able to integrate with a waste treatment system of a circuit board manufacture plant, includes a stirring unit, a crystallization unit and a pressure filtering unit. More than 2 parts of weight of acidic copper-containing etching process effluent, less than 1 parts of weight of copper-containing slurry, and less than 1 part of weight of waste mixture of an acidic copper-containing photolithography effluent and an acidic frame etching effluent are charged into the stirring unit to conduct decomposition. Alkaline hydroxide reacts with decomposition products in the crystallization unit. The temperature of the crystallization unit is at least 80° C. The pressure filtering unit outputs a copper hydroxide solution or a copper oxide solution.

REFERENCES:
patent: 4428773 (1984-01-01), Krotz
patent: 5560838 (1996-10-01), Allies et al.
patent: 6254783 (2001-07-01), Wurzburger et al.
patent: 6274045 (2001-08-01), Kreisler
patent: 6649131 (2003-11-01), Seo et al.
patent: 2006/0278583 (2006-12-01), Hsiao et al.

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