The recovery percentage was no more than 60% as the processes of trinal evaporation and vacuum distillation were applied to caprolactam reclamation from extract water in caprolactam polymerization plant.

  • 己内酰胺聚合装置回收萃取水中的己内酰胺采用三效蒸发、真空蒸馏的方法,回收率只有60%。

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