Title:
CONTINUOUSU PREPARATION OF AROMATIC AMINE
Document Type and Number:
Japanese Patent JP3670033
Kind Code:
B2
Abstract:
PURPOSE: To obtain aromatic diamines and/or polyamines by hydrogenating aromatic dinitro and/or polynitro compounds in the presence of an amine, a catalyst and water.
CONSTITUTION: A rapidly flowing mixture of aromatic dinitro and/or polynitoro compounds, an aromatic diamine and/or polyamine, a hydrogenating catalyst (e.g. Raney nickel), water and hydrogen is reacted in a loop venturi reactor equipped with an ejector having a mixing chamber in the absence of a solvent under a pressure of 5-100 bar at 120-220°C. In the process the reaction mixture is circulated such that the volume ratio of a mixture containing the amine, the catalyst, water and hydrogen to the nitro compound introduced is 50-500 and that the energy dissipated in the ejector nozzle is 4-40 kW per ton of the nitro compound introduced. If necessary, the heat removed from the reaction mixture can be utilized to generate steam having an overpressure of ≥2 bar.
Inventors:
Youve Jens Tsarnatsk
Fritz Paul
Dieter Glenner
Hartmut Hetzuel
Helmut Eudat
Fritz Paul
Dieter Glenner
Hartmut Hetzuel
Helmut Eudat
Application Number:
JP18305394A
Publication Date:
July 13, 2005
Filing Date:
July 13, 1994
Export Citation:
Assignee:
Bayer Aktiengesellschaft
International Classes:
B01J8/00; B01J19/00; B01J19/24; B01J19/26; B01J25/00; C07B61/00; C07C209/36; C07C211/50; (IPC1-7): C07C211/50; B01J25/00; C07C209/36
Domestic Patent References:
| JP62099350A | ||||
| JP60172947A | ||||
| JP59205346A | ||||
| JP51032613B1 | ||||
| JP39013916B1 |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard