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Aprotic polar solvent recovery method and aprotic polar solvent recovery apparatus

机译:非质子极性溶剂的回收方法及非质子极性溶剂的回收装置

摘要

PROBLEM TO BE SOLVED: To recover an aprotic polar solvent from an aqueous solution including at least alkali halide and an aprotic solvent industrially with high purity and efficiently, and to provide a stable process by preventing a salt from bringing into a following step 2.SOLUTION: A method of recovering an aprotic polar solvent is characterized by including the following three steps: a step (step 1) in which an aqueous solution including an alkali halide and/or an organic salt, and an aprotic solvent is made to contact with a non-halogenated type aliphatic organic compound of six or more of a carbon number at 50°C to 100°C, thereby extracting an organic phase 1 including an aprotic polar solvent; a step (step 2) in which the organic phase 1 is cooled to at least 20°C and less than 50°C and an organic phase 2 including the aprotic polar solvent is extracted by phase separation; and a step (step 3) that distils the organic phase 2.
机译:解决的问题:从工业上以高纯度和高效率从至少包含碱金属卤化物和非质子溶剂的水溶液中回收非质子极性溶剂,并通过防止盐进入后续步骤2提供稳定的工艺。解决方案:一种非质子极性溶剂的回收方法,其特征在于包括以下三个步骤:步骤(步骤1),使包含碱金属卤化物和/或有机盐的水溶液以及非质子溶剂与有机溶剂接触。在50℃至100℃的碳数为6以上的非卤代脂肪族有机化合物,从而提取出包含非质子极性溶剂的有机相1。步骤(步骤2),其中将有机相1冷却至至少20℃且低于50℃,并且通过相分离提取包含非质子极性溶剂的有机相2;和分散有机相2的步骤(步骤3)。

著录项

  • 公开/公告号JP5817560B2

    专利类型

  • 公开/公告日2015-11-18

    原文格式PDF

  • 申请/专利权人 東レ株式会社;

    申请/专利号JP20120016842

  • 发明设计人 青木 一史;竹田 多完;野村 渓;

    申请日2012-01-30

  • 分类号C08G75/02;

  • 国家 JP

  • 入库时间 2022-08-21 14:40:48

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