Recovery of nitric acid from nitration spent acid by toluene ext

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

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568932, 568927, 568939, 568940, C07C 7910

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046509127

ABSTRACT:
In a method for denitrifying the nitric acid- and nitrous acid-containing spent acid phase from the nitration of an aromatic hydrocarbon by the mixed acid process which comprises forming a denitrification reaction medium by contacting the spent acid phase with an aromatic hydrocarbon under nitration reaction conditions to recover the nitric acid by the formation of a nitroaromatic hydrocarbon, the improvement which comprises

REFERENCES:
patent: 2773911 (1956-12-01), Dubois et al.
patent: 2849497 (1958-08-01), Buchanan
patent: 4257986 (1981-03-01), Milligan et al.
patent: 4496782 (1985-01-01), Carr

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