Title:
アニリンの製造方法
Document Type and Number:
Japanese Patent JP5419327
Kind Code:
B2
Abstract:
Crude aniline is produced by hydrogenating nitrobenzene in the presence of a catalyst to produce crude aniline, and purifying the crude aniline by single- or multi-stage distillation. An aqueous alkali metal hydroxide solution is added to the crude aniline prior to distillation and/or during distillation of the crude aniline, and is adjusted to maintain molar ratio of alkali metal hydroxide to phenolic compounds present in the crude aniline at 0.1:1-10:1. Independent claims are included for: (1) a process of producing di- and polyamines in the diphenyl methane series; and (2) a process for producing di- and polyisocyanates in diphenyl methane series.
Inventors:
Marx Dougal
Franz-Ullrich von Gehren
Stephan Weershofen
Andre Lago
Peter Rainer
Benny Marlots
Franz-Ullrich von Gehren
Stephan Weershofen
Andre Lago
Peter Rainer
Benny Marlots
Application Number:
JP2007038362A
Publication Date:
February 19, 2014
Filing Date:
February 19, 2007
Export Citation:
Assignee:
Bayer MaterialScience AG
International Classes:
C07C209/36; C07C211/46; C07C263/10; C07C265/12; C07B61/00
Domestic Patent References:
| JP2004123746A | ||||
| JP2007508312A |
Attorney, Agent or Firm:
Toshio Yano
Takuya Kuno
Einzel Felix-Reinhard
Takuya Kuno
Einzel Felix-Reinhard