Title:
改良された気相(ポリ)イソシアネート製造方法
Document Type and Number:
Japanese Patent JP4339583
Kind Code:
B2
Abstract:
Preparation of di- and/or triisocyanates by phosgenation of corresponding di- and/or triamines involves heating the gaseous di- and/or triamines and phosgene separately to 200-600 degrees C, mixing the two in a static mixer with specific geometry and supplying the mixture continuously to a reaction zone without moving parts. Preparation of di- and/or triisocyanates of formula (I) by phosgenation of corresponding di- and/or triamines of formula (II) involves heating gaseous (II) (optionally diluted with inert gas or solvent vapor) and phosgene (III) separately to 200-600 degrees C, mixing the two gaseous starting materials in a static mixer with specific geometry and supplying the mixture continuously to a reaction zone without moving parts. (II) and (III) flow in parallel through a reactor, (II) being supplied through a central nozzle into a slower flow of (III) supplied via the annular space around the nozzle. The ratio of the narrowest nozzle diameter (d) to the reactor diameter (D) is 5-45%. R(NCO)n (I) R(NH2)n (II) R = aliphatic, cycloaliphatic or aromatic hydrocarbyl with up to 15C, provided that at least 2C are present between two NCO groups; and n = 2 or 3 (preferably 2).
Inventors:
Martin Friedrich
Herbert Stutz
Herbert Stutz
Application Number:
JP2002360733A
Publication Date:
October 07, 2009
Filing Date:
December 12, 2002
Export Citation:
Assignee:
Bayer Aktiengesellschaft
International Classes:
C07C263/10; C07C265/14
Domestic Patent References:
| JP6192205A | ||||
| JP6041046A | ||||
| JP63280050A | ||||
| JP7278089A | ||||
| JP9012525A |
Attorney, Agent or Firm:
Aoyama Aoi
Yasuo Shibata
Samejima Mutsumi
Yasuo Shibata
Samejima Mutsumi