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US 5,182,092 AGranted
Hydroxylammonium nitrate process
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorThomas Liggett
Life of this patent
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Abstract
A process for preparing hydroxylammonium nitrate which comprises reacting a hydroxylammonium salt, e.g., the sulfate, with an aqueous solution of a nitrate salt, e.g., sodium nitrate, in the presence of an organic solvent, e.g., butanol, in which the hydroxylammonium nitrate is soluble and the by-product salts are insoluble.
Claims7
A process for producing hydroxylammonium nitrate, which comprises the steps of:
- reacting a hydroxylammonium salt selected from the group consisting of hydroxylammonium sulfate, hydroxylammonium chloride, and hydroxylammonium acid sulfate with an aqueous solution of a nitrate salt selected from the group consisting of sodium nitrate, potassium nitrate, and calcium nitrate, and an organic solvent selected from the group consisting of n-butyl alcohol, sec-butyl alcohol, isobutyl alcohol and mixtures thereof and forming therein hydroxylammonium nitrate and mixtures thereof;
- purifying the hydroxylammonium nitrate containing organic solvent solution;
- and
- recovering the hydroxylammonium nitrate salt from the organic solvent.
1 more element
A process for producing hydroxylammonium nitrate which comprises the steps of:
- reacting hydroxylammonium sulfate with an aqueous solution of sodium nitrate, and a butanol selected from the group consisting of n-butyl alcohol, sec-butyl alcohol isobutyl alcohol, and mixtures thereof and forming therein hydroxylammonium nitrate and sodium sulfate;
- purifying the hydroxylammonium nitrate containing butanol solution by separating out crystals of the insoluble sodium sulfate;
- precipitating out water soluble impurities, carried into solution by dissolved water, from the butanol solution by drying said butanol solution and filtering the resultant suspension;
- removing any alcohol soluble solution impurities by treating the butanol solution with activated alumina;
- recovering the hydroxylammonium nitrate salt from the purified butanol solution by counter current water extraction;
- and,
- removing the last traces of butanol and adjusting the water content by vacuum distillation.
4 more elements
Dependencies are inferred from the claim text.