Separation Method and Method for Producing Isocyanate |
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| 申请号 | US15840691 | 申请日 | 2017-12-13 | 公开(公告)号 | US20180105489A1 | 公开(公告)日 | 2018-04-19 |
| 申请人 | Asahi Kasei Kabushiki Kaisha; | 发明人 | Masaaki Shinohata; Nobuhisa Miyake; | ||||
| 摘要 | Disclosed is a method for separating, with a multi-stage distillation column, a mixture containing an active hydrogen-containing compound (A) and a compound (B) that reversibly reacts with the active hydrogen containing compound (A), the method comprising distillation-separating the active hydrogen-containing compound (A) and the compound (B) with the multi-stage distillation column in the presence of an intermediate-boiling-point inactive compound (C) that has a normal boiling point between a normal boiling point of the active hydrogen-containing compound (A) and a normal boiling point of the compound (B) and is chemically inactive for both of the (A) and the compound (B). | ||||||
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| 说明书全文 | |||||||
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