Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Treating process fluid by means other than agitation or...
Reexamination Certificate
2005-05-31
2005-05-31
King, Roy (Department: 1742)
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Treating process fluid by means other than agitation or...
C205S081000, C205S099000, C205S101000, C205S252000, C205S300000
Reexamination Certificate
active
06899802
ABSTRACT:
In the conventional plating process, plating solutions are newly prepared and the plating solutions used previously are dumped as industrial wastes, which is accompanied by environmental loads, effluent costs, costs for purchasing new solutions, and the like, and the present invention can recycle a foemer plating solution to prepare a new plating solution, for example, in the following order: a process for preparing a Sn—Bi alloy plating solution (S1); a process for an active carbon treatment to remove the completing agent (S2); a process for removing Bi (S3); a process for a sedimenting treatment (S4); and a process for analyzing and correcting Sn plating solution. The recycling of plating solutions eliminates their effluent treatment and reduces environmental loads, effluent costs, and costs for purchasing new solutions. In the administration of the plating solution compositions, the conventional data can be utilized to facilitate the administrating operation.
REFERENCES:
patent: 4405412 (1983-09-01), Nardelli
patent: 5510014 (1996-04-01), Murayama
patent: 6406608 (2002-06-01), Uzoh et al.
patent: 6596148 (2003-07-01), Belongia et al.
Fish & Richardson P.C.
King Roy
Leader William T.
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