ANWENDUNG DER ELEKTRODIALYSE ZUR REGENERATION VON SAEURELOESUNGEN.

摘要

In the use of electrodialysis for regenerating spent metal ion-contg. acid solns. by passing the solns. through a dialysis cell confined by perm-selective membranes between an electrode pair, the novelty is that the solns. are spent acid solns. of 60-95 vol.% water, 5-40 vol.% nitric acid and 2.5-10 vol.% sulphuric acid, which have been used to produce dark grey to black coloured layers on Zn-Cu-Ti alloy articles, pref. rolled sheets and strips.