Process for forming ammonium dinitramide salt by reaction between ammonia and a nitronium-containing compound
First Claim
1. A process for the formation of ammonium dinitramide salt which comprises reacting ammonia with a nitronium-containing compound at a temperature at which ionically bonded ammonium dinitramide salt will form.
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Accused Products
Abstract
A method for forming an ionically bonded ammonium dinitramide salt having the formula NH430 N(NO2)2 - useful as a stable oxidizer for solid fuel rocket propellant or explosive formulations is disclosed. The ammonium dinitramide salt is formed by the reaction of ammonia and a nitronium-containing compound, such as a nitronium salt or a covalently bonded compound containing a NO2 - group, at a temperature of from about - 20° C. to about 120° C. The nitronium-containing compound may be either a covalently bonded compound containing a NO2 - group or a nitronium salt having the formula (NO2+)n X-n, where X is the anion of the nitronium salt and n= 1-2.
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Citations
26 Claims
- 1. A process for the formation of ammonium dinitramide salt which comprises reacting ammonia with a nitronium-containing compound at a temperature at which ionically bonded ammonium dinitramide salt will form.
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20. A process for the formation of ammonium dinitramide salt having the formula NH4+ N(NO2)2- which comprises:
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a) forming a solution, dispersion, or mixture of an aprotic liquid and a nitronium-containing compound selected from the group consisting of a covalently bonded compound containing a NO2 --group and a nitronium salt having the formula (NO2+)n X-n, where X is the anion of the salt and n=1-2; and b) contacting said nitronium-containing compound with ammonia at a temperature within a range of from about -20°
C. to about -120°
C. to form said ammonium dinitramide salt. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A process for the formation of ammonium dinitramide salt having the formula NH4+ N(NO2)2- which comprises:
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a) forming a solution, dispersion, or mixture of an aprotic liquid and a nitronium-containing compound selected from the group consisting of a covalently bonded compound containing a NO2 -group and a nitronium salt having the formula (NO2+)n X-n, where X is the anion of the salt and n=1-2; and b) contacting said nitronium-containing compound with a stoichiometric excess of ammonia at a temperature within a range of from about -20°
C. to about -120°
C., while maintaining the pressure within a range of between about 700 and 800 Torr for a period of from about 0.5 to about 8 hours;c) permitting said reaction mass to warm up to room temperature at the end of said reaction time period while stirring said reaction mass, and maintaining said reaction mass under an ammonia atmosphere; and d) separating said ammonium dinitramide salt product from said reaction mass.
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Specification