Ultrapure hydrazine production

Details Ultrapure hydrazine production Ultrapure hydrazine production

1989-02-09

1991-07-30

Manoharan, Virginia

Distillation: processes, separatory

Distilling to separate or remove only water

203 37, 203 73, 423407, B01D 310, B01D 334

Patent

active

050357751

ABSTRACT:
A process for producing hydrazine containing at least 98 percent by weight of N.sub.2 H.sub.4 which admixes an aqueous solution of hydrazine with an alkali metal hydroxide to form a hydrazine solution having a N.sub.2 H.sub.4 concentration of at least 70 percent by weight. The molar ratio of alkali metal hydroxide to water is less than about 0.5:1. The concentrated hydrazine solution is distilled in a fractional distillation apparatus at an overhead vapor temperature below about 50.degree. C. and at a pressure of less than about 60 mm Hg.

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patent: 2803524 (1957-08-01), Deutschman, Jr. et al.
patent: 4013758 (1977-03-01), Osborg
Schmidt, E. W., "Hydrazine and Its Derivatives", New York, Wiley-Interscience, 1984, pp. 73-84

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