Title:
炭酸ジアリールを用いるイソシアネートの製造方法
Document Type and Number:
Japanese Patent JP5242678
Kind Code:
B2
Abstract:
An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention provides an isocyanate production process including the steps of: obtaining a reaction mixture containing an aryl carbamate having an aryl group originating in a diaryl carbonate, an aromatic hydroxy compound originating in a diaryl carbonate, and a diaryl carbonate, by reacting a diaryl carbonate and an amine compound in the presence of a reaction solvent in the form of an aromatic hydroxy compound; transferring the reaction mixture to a thermal decomposition reaction vessel; and obtaining isocyanate by applying the aryl carbamate to a thermal decomposition reaction, wherein the reaction vessel in which the reaction between the diaryl carbonate and the amine compound is carried out and the thermal decomposition reaction vessel for the aryl carbamate are different.
Inventors:
Shinohata Masaaki
Nobuhisa Miyake
Nobuhisa Miyake
Application Number:
JP2010511822A
Publication Date:
July 24, 2013
Filing Date:
May 15, 2008
Export Citation:
Assignee:
Asahi Kasei Chemicals Corporation
International Classes:
C07C263/04; C07C265/14; C07C269/04; C07C271/54
Domestic Patent References:
| JPS61183257A | 1986-08-15 | |||
| JP2004262835A | 2004-09-24 | |||
| JP2006069941A | 2006-03-16 | |||
| JPH06192204A | 1994-07-12 | |||
| JPS61183257A | 1986-08-15 |
Foreign References:
| WO2005111049A1 | 2005-11-24 | |||
| WO2005000783A1 | 2005-01-06 |
Attorney, Agent or Firm:
Yoshiyuki Inaba
Toshifumi Onuki
Kazuhiko Naito
Toshifumi Onuki
Kazuhiko Naito
Previous Patent: JPS5242677
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