Synthesis of bis(2,2-dinitropropyl)acetal (BDNPA)

Details Synthesis of bis(2,2-dinitropropyl)acetal (BDNPA) Synthesis of bis(2,2-dinitropropyl)acetal (BDNPA)

1994-11-14

1997-07-15

Geist, Gary

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

Organic compounds

Oxygen containing

C07C 4150, C07C 4330

Patent

active

056485565

ABSTRACT:
A nonsolvent process of synthesizing bis(2,2-dinitropropyl)acetal (BDNPA) is disclosed. In the process, 2,2-dinitropropanol (DNPOH) is reacted at low temperature with an acetaldehyde source in the presence of an acid catalyst, such as a Lewis acid catalyst or protic acid catalyst. To inhibit by product formation, the reaction temperature is maintained from about -30.degree. C. to 30.degree. C. Upon completion of the reaction, the reaction solution is quenched with water and washed with an aqueous hydroxide solution. The hydroxide concentration should be sufficient to neutralize any acid formed during the quenching step and to solubilize unreacted 2,2-dinitropropanol as well as other aqueous soluble byproducts in the reaction solution. The BDNPA product is extracted with methyl tert-butyl ether (MTBE) or equivalent solvent. The organic solvent is evaporated to yield usable BDNPA product. The resulting yield is at least 50% based on the starting quantity of 2,2-dinitropropanol.

REFERENCES:
patent: 5449835 (1995-09-01), Hamilton et al.

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