分離方法及びイソシアネートの製造方法

Japanese Patent JP5612115

B2

An object of the present invention is to provide the separation of a mixture containing plural types of reversibly reacting compounds, especially, a method for efficiently separating an isocyanate from a mixture containing the isocyanate and a hydroxy compound, particularly, a method for efficiently separating an isocyanate and a hydroxy compound that form by the thermal decomposition of an N-substituted carbamic acid ester. The object is attained by 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).

篠畑 雅亮
三宅 信寿

JP2012537721A

October 22, 2014

October 04, 2011

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旭化成ケミカルズ株式会社

C07C39/04; C07C263/20; C07C263/04; C07C265/14

JPS59207837A	1984-11-26
JPS51123159A	1976-10-27
JP2010215588A	2010-09-30
JPH06157448A	1994-06-03
JPS59207837A	1984-11-26
JPS51123159A	1976-10-27
JP2010215588A	2010-09-30
JPH06157448A	1994-06-03

JPN6014025086; 化学大辞典１ 初版第１刷発行, 19600330, Ｐ１０９８
JPN6014025089; 化学大辞典３ 初版第１刷発行, 19600930, Ｐ２８０
JPN6014025086; 化学大辞典１ 初版第１刷発行, 19600330, Ｐ１０９８
JPN6014025089; 化学大辞典３ 初版第１刷発行, 19600930, Ｐ２８０

Yoshiki Hasegawa
Yoshinori Shimizu
Hiroyuki Nishimoto
Hideki Okita

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