Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1995-08-03
1997-10-21
Cintins, Marianne M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568932, C07C20506
Patent
active
056798733
ABSTRACT:
Dinitrotoluene is produced in a two-stage process from toluene and nitric acid in the presence of sulfuric acid under adiabatic conditions in the presence of nitrating acids made up of specified components. The reaction product of the first phase is separated into an acid phase and an organic phase containing the mononitrotoluene. Some water is removed from the acid phase, nitric acid is added and the resultant mixture is recycled. The organic phase containing mononitrotoluene is further nitrated to produce the dinitrotoluene. This nitration mixture is also separated into an acid phase and an organic phase. The acid phase is treated to remove some water, nitric acid is added and the resultant acid mixture is recycled. Dinitrotoluene is recovered from the organic phase. This process is advantageous in that dilute nitric acid may be used and the heat of the nitration reaction is utilized.
REFERENCES:
patent: 3928475 (1975-12-01), Dassel
patent: 4021498 (1977-05-01), Alexanderson et al.
patent: 4091042 (1978-05-01), Alexanderson et al.
patent: 4453027 (1984-06-01), Vaidyanathan
patent: 4496782 (1985-01-01), Carr
patent: 4650912 (1987-03-01), Pohl et al.
patent: 4663490 (1987-05-01), Gerken et al.
patent: 5345012 (1994-09-01), Schieb et al.
Winnacker, Kuchler, Chem Technol, vol. 2, Anorg. Technol. I. 4th Edition, 1982, pp. 70 to 72.
R.A. Vauck, H.A. Muller, Grundoperationen chemscher Verfahrensticknik, 5th Edition, VEB Leipzip, 1962 p. 447.
Klingler Uwe
Schieb Thomas
Wiechers Gerhard
Zimmermann Jurgen
Bayer Aktiengesellschaft
Cintins Marianne M.
Gil Joseph C.
Jones Dwayne C.
Whalen Lyndanne M.
LandOfFree
Process for the production of dinitrotoluene does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the production of dinitrotoluene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of dinitrotoluene will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1008268