PREPARATION OF WASTE WATER CONTAINING SODIUM CHLORIDE FOR USE IN CHLOR-ALKALI ELECTROLYSIS

摘要

Treatment of waste waters containing common salt for use in chlor-alkali electrolysisAbstractThe present invention relates to a process for the treatment of waste waters containing common salt, characterised in that, by a specific sequence of acidification, extraction, alkalisation and stripping steps, an aqueous common salt solution is obtained, which can be used directly in chlor-alkali electrolysis.