Title:
有機イソシアネートの製造方法
Document Type and Number:
Japanese Patent JP2009537578
Kind Code:
A
Abstract:
Processes for the production of organic isocyanates, comprising the production of phosgene by reaction of CO with Cl2, the reaction of the phosgene with organic amines to form the organic isocyanates, and the separation of the organic isocyanates, which is characterised in that the carbon monoxide is removed from the HCl-containing waste gas from the isocyanate synthesis by reaction with chlorine to form phosgene. The phosgene can be separated off and can optionally be fed back into an isocyanate synthesis The HCl-containing, CO-depleted gas is preferably subjected to HCl oxidation (Deacon). A closed chlorine cycle can be used in the isocyanate synthesis.
Inventors:
Michel Haas
Tim Rodden Kemper
Bernd Ruffer
Tim Rodden Kemper
Bernd Ruffer
Application Number:
JP2009511379A
Publication Date:
October 29, 2009
Filing Date:
May 16, 2007
Export Citation:
Assignee:
Bayer MaterialScience AG
International Classes:
C07C263/10; C01B32/80; C07C265/12; C07B61/00
Attorney, Agent or Firm:
Samejima Mutsumi
Kyousei Tamura
Masaishi Nishishita
Genban Sanae
Kyousei Tamura
Masaishi Nishishita
Genban Sanae