Electrodialytic conversion of complexes and salts of metal catio

Details Electrodialytic conversion of complexes and salts of metal catio Electrodialytic conversion of complexes and salts of metal catio

1991-03-29

1993-11-23

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204151, 204 96, B01D 6100

Patent

active

052640973

ABSTRACT:
Complexes and salts of metal cations in aqueous solutions are electrodialytically converted into a solution of acids substantially free of metal cations and insoluble metal hydroxides. Metal cations are insolubilized by hydroxyl ions formed in a catholyte while anions are electrotransported from the catholyte and converted into a solution of acids by hydrogen ions formed in an anolyte of an electrodialytic process. The conversion process is carried out electrically without the electrotransport of metal cations and is especially useful for reforming solutions of acids that form complexes when etching and finishing metal surfaces.

REFERENCES:
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patent: 4149951 (1979-04-01), Eddleman
patent: 4289597 (1981-09-01), Grenda
patent: 4468305 (1984-08-01), Hillis
patent: 4762601 (1988-08-01), Krulik et al.

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