Method and apparatus for the purification of rinsing bath after brightening and for recovery of the brightening acids contained in these rinsing baths.

摘要

Method for the purification and recovery of baths for rinsing of acidic brightening baths, characterised in that it comprises an application which is continuous and at least of the following stages, a stage of purification of rinsing baths by liquid-liquid exchanges comprising bringing these rinsing baths which are enriched in acids and in metal salts or aqueous phase into contact with an organic solvent or organic phase, and a stage of recovery of the acids by liquid-liquid exchanges comprising bringing water into contact with an organic phase containing acids. <IMAGE>