Title:
イソシアネートの製造方法
Document Type and Number:
Japanese Patent JP5815517
Kind Code:
B2
Abstract:
An isocyanate is produced by reacting an amine with a stoichiometric excess of phosgene in the gas phase. This reaction is carried out at a temperature above the amine's boiling point to obtain a liquid stream containing the isocyanate and a gas stream containing hydrogen chloride and phosgene. The gas stream containing hydrogen chloride and phosgene thus produced is separated into a gas stream containing hydrogen chloride and a liquid stream containing phosgene. At least part of the liquid stream containing phosgene is then converted to a gas stream containing phosgene which gas stream is then recycled. The gaseous phosgene stream is maintained at a higher pressure than the liquid phosgene stream.
Inventors:
Reiner Bruns
Wolfgang Lorenz
Fleethelm Steffens
Herbert Stutz
Wolfgang Lorenz
Fleethelm Steffens
Herbert Stutz
Application Number:
JP2012518792A
Publication Date:
November 17, 2015
Filing Date:
June 26, 2010
Export Citation:
Assignee:
Bayer MaterialScience AG
International Classes:
C07C263/10; C01B32/80; C07C263/20; C07C265/14
Foreign References:
| WO2009037179A1 |
Attorney, Agent or Firm:
Hirohito Katsunuma
Hiroshi Sorimachi
Mari Asano
Takaaki Suemori
Hiroshi Sorimachi
Mari Asano
Takaaki Suemori