介绍萃取精馏系统存在的萃取剂结焦变性的问题,通过对常用化工清洗方法的分析和比较,探索出适合萃取精馏系统填料塔的清洗方法。%There is degeneration and coke problem in extractive distillation system. Through analysis and comparison of common chemical clean methods, the suitable clean method of packed column of extractive distillation system is proposed.
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