VERFAHREN ZUM ENTFERNEN VON SAEURE AUS KATHODISCHEN ELEKTROTAUCHLACKIER-BAEDERN MITTELS ELEKTRODIALYSE.

摘要

Method of removing acid from cathodic lacquer coating bath consists of separating the dispersion by means of ultra-filtration into the resin dispersion and the ultra-filtrate and de-acidifying the latter by passing through the chambers K, of an electrodialysis cell operating with a DC and having the characteristic sequence -(K2-M1-K1-M1)n- in which M1 are the anion exchange membranes and n is 1-500 while an aqueous base is passed through chambers K2. During the electrodialysis the electric field which carries out the ions transport through the membranes is changed by alternating the polarity.