Process for the production of nitroaromatic compounds

Details Process for the production of nitroaromatic compounds Process for the production of nitroaromatic compounds

1995-08-03

1997-12-09

Cintins, Marianne M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568927, 568932, C07C20506

Patent

active

056963050

ABSTRACT:
Nitroaromatic compounds are produced by continuously reacting an aromatic compound with nitrating acid. The reaction mixture is separated into an organic phase from which the desired nitroaromatic compound is recovered and an acid phase. The acid phase is subjected to flash evaporation to remove at least 5% by weight of the water present therein. The vapors generated during the flash evaporation are introduced into a jet spray of coolant to produce a condensate made up coolant, condensed vapors and suspended organic compounds. A portion of the condensate is subjected to phase separation to remove water and organic compounds present therein. The water and organic compounds may be reused. The process of the present invention is particularly advantageous in that deposits which block pipelines and interfere with heat transfer are not generated.

REFERENCES:
patent: 4367347 (1983-01-01), Sawicki
patent: 4772757 (1988-09-01), Lailach et al.
patent: 5345012 (1994-09-01), Schieb et al.
Bodenbrenner, von Plessen, Vollmuller, Dechema-Monogr. 86 1980, 197.
Winnacker, Kuchler, Chem. Technol., vol. 2, Anorg. Technol. I, 4th Edition, 1982 pp. 70-72.
R.A. Vauck, H.A. Muller, Grundoperationen Chemischer Verfahrenstechnik, 5th Edition, VEB Leipzig 1962 p. 447.

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