Removal of acid from cathodic electrocoating baths by electrodia

Details Removal of acid from cathodic electrocoating baths by electrodia Removal of acid from cathodic electrocoating baths by electrodia

1987-12-09

1989-11-28

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204301, 2041808, 204299EC, B01D 1302

Patent

active

048835730

ABSTRACT:
Acid is removed from cathodic electrocoating baths by a process in which electroconductive substrates are coated with cationic resins present in the form of aqueous dispersions, at least a portion of the coating bath being subjected to an ultrafiltration where the ultrafiltration membrane retains the cationic resin to form an ultrafiltrate which contains water, solvent, low molecular weight substances and ions and at least a portion of the ultrafiltrate is recycled into the coating bath, and at least a portion of the ultrafiltrate is subjected to a special electrodialysis treatment before being returned into the electrocoating bath.

REFERENCES:
patent: 3394068 (1968-07-01), Calmon et al.
patent: 3495465 (1970-02-01), Nordsieck
patent: 3663405 (1972-05-01), Christenson et al.
patent: 3663406 (1972-05-01), Bras et al.
patent: 4031050 (1977-06-01), Jerabek
patent: 4057481 (1977-11-01), Lee et al.
patent: 4105532 (1978-08-01), Haines et al.
patent: 4140815 (1979-02-01), Dege et al.
patent: 4190567 (1980-02-01), Ohmura et al.
patent: 4253900 (1981-03-01), Dege et al.
patent: 4289597 (1981-09-01), Grenda
patent: 4355116 (1982-10-01), Lee et al.
patent: 4552635 (1985-11-01), Jenczewski et al.
patent: 4581111 (1986-04-01), Christenson et al.
patent: 4584246 (1986-04-01), Liu et al.
patent: 4615780 (1986-10-01), Walker
patent: 4670125 (1987-06-01), Mueller et al.
patent: 4673454 (1987-06-01), Liu et al.
Wilson, J. R. ed. "Demineralization by Electrodialysis", p. 43.
World Surface Coating Abstracts (1978) No. 3929.

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