文献类型：专利

英文题名：Process for recovering methylene dichloride from multi-component mixed solution containing methylene dichloride

作者：JI L;ZHU J;CHEN K;WU B

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY

申请号：CN1699313-A

申请日：2005-06-03

公开日：2005-11-23

语种：英文

收录：DERWENT

摘要：NOVELTY - The invention discloses a process for recovering methylene dichloride from multi-component mixed solution containing methylene dichloride which mainly comprises, carrying out two-step abstraction, conducting constant pressure batch fractionating under the condition of variable reflux ratio. The invention overcomes the problem of low purity and recovery ratio for methylene chloride and high reclamation cost in the conventional technology for reclaiming methylene chloride from the miscible liquid of methyl alcohol, pyridine, triethylamine and water.