The exhansted alkali lye of cyclohexane oxidation was extracted step with cyclhexanol (or cyclohexanone) cyclohexane; the extracting effect is better and the recovery rate of extrantant is higher.

• 对环己烷氧化废碱液采用环己酮(或环己醇)环己烷分步萃取,萃取效果好,萃取剂回收率高。