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

摘要

The invention relates to a method for preparing waste water containing sodium chloride. Said method is characterized in that an aqueous sodium chloride solution is obtained by a specific sequence of acidulation, extraction, alkalization and stripping steps. The sodium chloride solution can then be used immediately for chlor-alkali electrolysis.