Nitric acid recovery by the adiabatic nitration of nitroaromatic

Details Nitric acid recovery by the adiabatic nitration of nitroaromatic Nitric acid recovery by the adiabatic nitration of nitroaromatic

1983-07-08

1985-01-29

Sebastian, Leland A.

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

Organic compounds

Oxygen containing

568932, 568939, 568940, C07C 7910

Patent

active

044967829

ABSTRACT:
A method is provided for denitrifying the aqueous spent acid of mononitration. The nitric acid in the aqueous spent acid is recovered by adiabatically reacting greater than a stoichiometric amount of a mononitroaromatic hydrocarbon with the aqueous spent acid which has been fortified to a nitric acid concentration of at least about 2 wt %. The denitrification method is useful in treating the aqueous spent acid phase from the mononitration stage of a dinitrotoluene process.

REFERENCES:
patent: 2012985 (1935-09-01), Castner
patent: 2256999 (1941-09-01), Castner
patent: 2402180 (1946-06-01), Panazoni
patent: 2849497 (1958-08-01), Buchanan
patent: 3975452 (1976-08-01), Mayer et al.
patent: 4021498 (1977-05-01), Alexanderson et al.
patent: 4257986 (1981-03-01), Milligan et al.
Urbanski, Chemistry and Technology of Explosives, vol. I, The MacMillan Co., New York, 1964, pp. 347 to 349.

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