Recycle of electrical equipment

Details Recycle of electrical equipment Recycle of electrical equipment

2008-02-26

2010-06-08

Choi, Ling-Siu (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Process of treating scrap or waste product containing solid...

C521S040500, C521S047000, C528S480000, C528S488000, C528S489000, C528S491000, C528S495000, C422S255000, C510S188000

Reexamination Certificate

active

07732503

ABSTRACT:
The conventional techniques for recycling an electrical equipment including a hardened epoxy resin and electroconductive material has involved conventional problems that a catalyst is degraded to an extent that it can be no longer reused when a water is contained in a dissolving system. Moreover, moisture, when present in the dissolving system for treating an electrical equipment including an electroconductive material of aluminum, may react with aluminum to produce an aluminate compound which is transformed into aluminum oxide (alumina) under heating, which, in turn, may cause abnormal temperature rise to melt aluminum. This may be accompanied by formation of hydrogen which can cause danger of explosion. The present invention manages moisture content in the dissolving system by drying an object to be treated, a catalyst and a solvent prior to the dissolving treatment.

REFERENCES:
patent: 5069992 (1991-12-01), Tachikawa et al.
patent: 6245822 (2001-06-01), Terada et al.
patent: 6962628 (2005-11-01), Shibata et al.
patent: 2263995 (1975-11-01), None
patent: 04-022477 (1992-01-01), None
patent: 2001-172426 (2001-06-01), None
Derwent abstract of French Patent FR 2263995.
Kazunobu Maekawa, et al., “FRP Recycling Technology Invalving Depolymerization of Unsaturated Polyester Under Ordinary Pressure”, U.D.C, No. 42(Jan. 2004).

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