Title:
イソシアネートの製造方法
Document Type and Number:
Japanese Patent JP7165509
Kind Code:
B2
Abstract:
To provide a method for producing isocyanate that suppresses a side reaction and continuously produces isocyanate.SOLUTION: The present invention provides a method for producing isocyanate by pyrolysis of carbamate, the method including: a pyrolysis step in which a liquid mixture containing carbamate and a compound being high-boiling-point ketone is continuously introduced into a pyrolytic reactor for a pyrolytic reaction of carbamate; a low-boiling-point pyrolytic product recovery step in which a low-boiling-point pyrolytic product having a normal boiling point lower than that of the compound is continuously extracted in a gas state from the pyrolytic reactor; and a high-boiling-point component recovery step in which a liquid phase component, which has not been recovered in a gas state in the low-boiling-point pyrolytic product recovery step, is continuously extracted as a high-boiling-point component from the pyrolytic reactor.SELECTED DRAWING: None
More Like This:
Inventors:
Miyake Nobuto
Koichi Nakaoka
Masaaki Shinohata
Koichi Nakaoka
Masaaki Shinohata
Application Number:
JP2018094167A
Publication Date:
November 04, 2022
Filing Date:
May 15, 2018
Export Citation:
Assignee:
ASAHI KASEI KABUSHIKI KAISHA
International Classes:
C07C263/04; C07C263/20; C07C265/14; C07C319/20; C07C323/57
Domestic Patent References:
| JP54039002A | ||||
| JP60231640A |
Attorney, Agent or Firm:
Sumio Tanai
Yasushi Matsunuma
Masato Iida
田▲崎▼ 聡
Ryu Miyamoto
Yasushi Matsunuma
Masato Iida
田▲崎▼ 聡
Ryu Miyamoto