Recovery of nitric acid and sulfuric acids in production of beta

Details Recovery of nitric acid and sulfuric acids in production of beta Recovery of nitric acid and sulfuric acids in production of beta

1989-06-12

1990-05-15

Springer, David B.

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

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

C07D22502

Patent

active

049259369

ABSTRACT:
Recovery of sulfuric and nitric acids from spent acid streams in a process for producing beta HMX in which hexamine, ammonia and acetic anhydride are reacted to produce DAPT, the DAPT is treated with a mixture of sulfuric and nitric acids to produce DADN which is then nitrolyzed with N.sub.2 O.sub.5 and anhydrous nitric acid to produce a HMX solution which is added to a dispersion of beta HMX seed crystals in water to selectively precipitate beta HMX from the HMX solution is accomplished by maintaining the DAPT/DADN spent acid stream separate from the HMX spent acid stream and treating the DAPT/DADN spent acid stream in a sulfuric acid recovery unit and treating the HMX spent acid stream in a magnesium nitrate nitric acid recovery unit.

REFERENCES:
patent: 4163845 (1979-08-01), Brumley
patent: 4785094 (1988-11-01), Levinthal
Gericke, D., Concentration of Nitric Acid by Sulphuric Acid, Chemie-Ingenieur-Technik 21/74, pp. 894-899.
Rodger, I., Developments in the Concentration of Sulfuric Acid, AICHE Journal 1982.
Sloan, J. G., "The Extractive Distillation Process for Nitric Acid Concentration Using Magnesium Nitrate".

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