Electro ultrafiltration process and apparatus

Details Electro ultrafiltration process and apparatus Electro ultrafiltration process and apparatus

1974-09-23

1976-03-23

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204299EC, 204300EC, C25D 1306, B01D 1302

Patent

active

039459004

ABSTRACT:
An electro-ultrafiltration process is conducted in a tank in which the cathode and anode regions are separated by an anisotropic ultrafiltration membrane. A pressure differential is applied across the membrane and the fluid component of the bath moves through the membrane under the influence of this pressure for removal from the tank. Current applied between the electrodes develops an additional flow of the fluid component of the bath through the membrane. Due to the special characteristics of the anisotropic membrane, the total flux through the membrane under these conditions greatly exceeds the flux attributable to the individual effects of pressure and current. This process is especially useful when applied in electrophoretic coating systems, for it can establish a stable bath composition and it also tends to maintain the membrane in an essentially unfouled condition.

REFERENCES:
patent: 3663397 (1972-05-01), Le Bras et al.
patent: 3730866 (1973-05-01), Madejczyk
patent: 3784460 (1974-01-01), Le Bras et al.

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