Thomas Liggett

51820927, Jan 26, 1993

Mar 1, 1976

5/662647

Thomas Liggett - Indian Head MD

The United States of America as represented by the Secretary of the Navy - Washington DC

C01B 2120

423387

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.

40667367, Jan 3, 1978

Mar 19, 1976

5/668569

Thomas Liggett - Indian Head MD

The United States of America as represented by the Secretary of the Navy - Washington DC

C01B 2114

423386

A process for preparing concentrated solutions of hydroxylammonium nitrate (HAN) or hydroxylammonium perchlorate (HAP) which comprise reacting hydroxylammonium sulfate with either barium nitrate or barium perchlorate, in such a way that the dissolved barium salt is reacted with the dissolving hydroxylammonium sulfate while agitating the system so as to keep the slurried barium salt from directly contacting the hydroxylammonium sulfate. The rate of addition of the hydroxylammonium sulfate is slower than the rate of solution of the barium salt. An excess of barium nitrate or barium perchlorate ions is needed in the solution to which the hydroxylammonium sulfate is added until the reaction is terminated. The concentration of the HAN or HAP in the final solution can be increased still further if a solution of HAN or HAP is respectively used in forming the barium salt slurry.