Process for separating nitroaromatic compounds from spent nitric

Details Process for separating nitroaromatic compounds from spent nitric Process for separating nitroaromatic compounds from spent nitric

1984-08-07

1987-02-10

Terapane, John F.

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

Organic compounds

Oxygen containing

260688, C07C 7910, C07B 4302

Patent

active

046423966

ABSTRACT:
This invention pertains to a process for extracting a nitroaromatic composition from a nitration medium containing nitric acid, water, and nitroaromatic. The process comprises contacting the nitration medium with nitric oxide under conditions such that the nitric oxide will react with the nitric acid to form nitrogen dioxide and water. Gaseous nitrogen dioxide is removed from the reaction medium and accordingly, the dissolved nitroaromatic present in the nitration medium separates to form an organic phase which then can be removed by decantation. Typically, one mole of nitric oxide is added to the nitration medium for every two moles of nitric acid present in said medium. Reaction conditions normally are from about 0.degree. to 90.degree. C.

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