Dinitramide salts and method of making same
First Claim
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1. A N,N-dinitramide salt having the formula M+r [N(NO2)2- ]r where M is a cation selected from the group consisting of a metal ion and a nitrogen-containing ion, and r is the cationic charge of M.
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Abstract
A N,N-dinitramide salt is disclosed having the formula MN(NO2)2 where M is a cation selected from the class consisting of a metal ion and a nitrogen-containing ion. The dinitramide salt exhibits high temperature stability, high energy density, and an absence of smoke generating halogens, rendering it useful as an oxidizer in rocket fuels. The dinitramide salts are meltable and pumpable oxidizers which may be used in start-stop rocket engines instead of other less stable oxidizers.
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21 Claims
- 1. A N,N-dinitramide salt having the formula M+r [N(NO2)2- ]r where M is a cation selected from the group consisting of a metal ion and a nitrogen-containing ion, and r is the cationic charge of M.
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11. A N,N-dinitramide salt having the formula M+r [N(NO2)2- ]r where r is the cationic charge of M and M is a cation selected from the group consisting of:
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a) mono, di, and trivalent metal ions elected from the group consisting of Li, Na, K, Rb, Cs, Ca, Ba, Sr, Mg, Cu, Ag, and Au, Zn, Cd, Hg, Al, Sc, Y, Ga, In, Lanthanide elements (57-71), Ti, Zr, Hf, Ge, Sn, V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, and Pt; b) a cation having the formula Rk Hm Nn+z, wherein n=1 to 8, k=0 to 2+n, z=1 to n, m=n+2+z-k, and each R is the same or different 1-6 carbon straight chain or branched alkyl; and c) a nitrogen-containing cation selected from the group consisting of guanidinium;
triaminoguanidinium;
nitronium;
nitrosonium;
an ionic polymer of ethyleneimine containing 1-10,000 nitrogen atoms;
cubane-1,4-bis ammonium ion;
cubane-1,2,4,7-tetra ammonium ion;
cubane-1,2,3,4-tetra ammonium ion;
cubane-1,3,5,7-tetra ammonium ion;
cubane-1,2,3,4,7-penta ammonium ion; and
cubane-1,2,4,6,8- penta ammonium ion.
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- 12. A N,N-dinitramide salt having the formula M+- N(NO2)2 where M is a monovalent cation selected from the group consisting of a metal ion and a nitrogen-containing ion.
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21. A N,N-dinitramide salt having the formula MN(NO2)2 where M is a cation selected from the group consisting of:
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a) monovalent metal ions elected from the group consisting of Li, Na, K, Rb, Cs, Cu, Ag, Au, and Hg; b) a cation having the formula Rk Hm Nn+, wherein n=1 to 8 , k=0 to 2+n, m=n+3-k, and each R is the same or different 1-6 carbon straight chain or branched alkyl; and c) a nitrogen-containing cation selected from the group consisting of guanidinium;
triaminoguanidinium;
nitronium;
nitrosonium;
cubane-1,4-bis ammonium ion;
cubane-1,2,4,7-tetra ammonium ion;
cubane-1,2,3,4-tetra ammonium ion;
cubane-1,3,5,7-tetra ammonium ion;
cubane-1,2,3,4,7-penta ammonium ion; and
cubane-1,2,4,6,8-penta ammonium ion.
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Specification