Method of preparing solid hydroxylamine nitrate
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorKerry L. Wagaman
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Abstract
The present invention comprises a process of producing HAN by slowly adding nitric acid to an alcoholic solution of hydroxylamine. This forms a precipitate of solid HAN. However, if more nitric acid is added, the precipitate dissolves before the stoichiometric amount of acid has been added. Therefore, sufficient nitric acid is added to form a maximum amount of solid HAN precipitate. The solid HAN is then isolated by conventional means such as filtration or centrifugation, possibly preceded by chilling this solution. The excess alcoholic solution of unreacted hydroxylamine may be recycled and used as starting material in the process.
Claims10
A method of producing solid hydroxylamine nitrate, comprising the steps of:
- adding nitric acid to an alcoholic solution of hydroxylamine, having a concentration of over about 84% alchohol, to form solid hydroxylamine nitrate;
- chilling the resulting solution from about 20° C. to about −20° C.;
- and,
- filtering the solid hydroxylamine nitrate from a resulting solution.
Dependencies are inferred from the claim text.