Title:
ジフェニルメタン系のジアミン及びポリアミンの製造方法
Document Type and Number:
Japanese Patent JP4868498
Kind Code:
B2
Abstract:
Preparation of di- and polyamine of diphenylmethane comprises reacting nitrobenzene and methanol in presence of a catalyst to give aniline, formaldehyde and carbon monoxide; reacting the aniline and formaldehyde in the presence of an acid catalyst to give di- and polyamine of diphenylmethane; and reacting the carbon monoxide with chlorine to form phosgene. An independent claim is included for the preparation of di- and polyisocyanate of diphenylmethane comprising the steps involved in the preparation of di- and polyamine of diphenylmethane followed by phosgenating the obtained di- and polyamine of diphenylmethane.
Inventors:
Stephan Grabowski
Marx Dougal
Aurel Wolf
Marx Dougal
Aurel Wolf
Application Number:
JP2006032145A
Publication Date:
February 01, 2012
Filing Date:
February 09, 2006
Export Citation:
Assignee:
Bayer MaterialScience AG
International Classes:
C07C209/78; C07C45/29; C07C47/04; C07C209/36; C07C211/46; C07C211/50; C07C263/10; C07C265/16; C08G18/76; C07B61/00
Domestic Patent References:
| JP58198444A | ||||
| JP2002523489A | ||||
| JP2003313155A | ||||
| JP59206346A |
Foreign References:
| WO2004014845A1 |
Other References:
Gazzetta Chimica Italiana,1992年,p.221-3
Attorney, Agent or Firm:
Toshio Yano
Takuya Kuno
Einzel Felix-Reinhard
Takuya Kuno
Einzel Felix-Reinhard