Title:
ジフェニルメタンジイソシアネート(MDI)を製造する方法及び好ましくは蒸留的に処理する方法
Document Type and Number:
Japanese Patent JP2013508337
Kind Code:
A
Abstract:
What is proposed is a process for preparation and distillative workup of diphenylmethane diisocyanate (MDI), proceeding from a benzene-comprising feedstream, in which, in a catalytic hydrogenation of nitrobenzene to aniline, steam is raised at two different pressure levels, which partly or completely covers the energy demand for the overall process, by using two fluidized bed reactors of identical design, of which a first fluidized bed reactor is operated with an aniline load for which the fluidized bed reactors have been designed and provides steam at a first, lower pressure level, and a second fluidized bed reactor is operated with a load lowered with respect to the first fluidized bed reactor to such an extent that the second fluidized bed reactor affords steam at the higher pressure level.
Inventors:
Schneider, christian
Cafreto, Nikolaus
Whistler, Andreas
Denisen, Leo
Königsmann, Lucia
Cafreto, Nikolaus
Whistler, Andreas
Denisen, Leo
Königsmann, Lucia
Application Number:
JP2012534683A
Publication Date:
March 07, 2013
Filing Date:
October 20, 2010
Export Citation:
Assignee:
BASF SE
International Classes:
C07C263/10; C07C263/20; C07C265/14
Attorney, Agent or Firm:
Satoshi Eto