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Ethylenediamine salt of 5-nitrotetrazole and preparation. This salt has been found to be useful as an explosive alone and in eutectic mixtures with ammonium nitrate and/or other explosive compounds. Its eutectic with ammonium nitrate has been demonstrated to behave in a similar manner to a monomolec

Ethylenediamine salt of 5-nitrotetrazole and preparation. This salt has been found to be useful as an explosive alone and in eutectic mixtures with ammonium nitrate and/or other explosive compounds. Its eutectic with ammonium nitrate has been demonstrated to behave in a similar manner to a monomolecular explosive such as TNT, and is less sensitive than the pure salt. Moreover, this eutectic mixture, which contains 87.8 mol % of ammonium nitrate, is close to the CO 2 -balanced composition of 90 mol %, and has a relatively low melting point of 110.5 C. making it readily castable. The ternary eutectic system containing the ethylenediamine salt of 5-nitrotetrazole, ammonium nitrate and ethylenediamine dinitrate has a eutectic temperature of 89.5 C. and gives a measured detonation pressure of 24.8 GPa, which is 97.6% of the calculated value. Both the pure ethylenediamine salt and its known eutectic compounds behave in substantially ideal manner. Methods for the preparation of the salt are described.

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1. A process for preparing the ethylenediamine salt of 5-nitrotetrazole, which comprises the steps of: a. dissolving two equivalents of ammonium 5-nitrotetrazole in methanol forming thereby a first solution; b. adding one equivalent of ethylenediamine to said first solution, forming thereby a se

1. A process for preparing the ethylenediamine salt of 5-nitrotetrazole, which comprises the steps of: a. dissolving two equivalents of ammonium 5-nitrotetrazole in methanol forming thereby a first solution; b. adding one equivalent of ethylenediamine to said first solution, forming thereby a second solution; c. allowing sufficient interaction time to permit said ammonium 5-nitrotetrazole and said ethylenediamine in said second solution to react to substantial completion; and d. removing said methanol. 2. The process as described in claim 1, wherein the ethylenediamine salt of 5-nitrotetrazole is purified by adding to the steps of dissolving the ethylenediamine salt in methanol and recrystallizing the ethylenediamine salt therefrom. 3. The process as described in claim 1, wherein the ethylenediamine salt of 5-nitrotetrazole is purified by adding the steps of dissolving the ethylenediamine salt in water and recrystallizing the ethylenediamine salt therefrom. 4. The process as described in claim 1, wherein the ethylenediamine salt of 5-nitrotetrazole is purified by adding the steps of dissolving the ethylenediamine salt in a mixture of methanol and water and recrystallizing the ethylenediamine salt therefrom. 5. A process for preparing the ethylenediamine salt of 5-nitrotetrazole, which consists essentially of the steps of: a. dissolving two equivalents of ammonium 5-nitrotetrazole in methanol forming thereby a first solution; b. adding one equivalent of ethylenediamine to said first solution, forming thereby a second solution; c. allowing sufficient interaction time to permit said ammonium 5-nitrotetrazole and said ethylenediamine in said second solution to react to substantial completion; and d. removing said methanol. 6. The process as described in claim 5, wherein the ethylenediamine salt of 5-nitrotetrazole is purified by adding the steps of dissolving the ethylenediamine salt in a mixture of methanol and water and recrystallizing the ethylenediamine salt therefrom. 7. An explosive composition of matter which comprises the ethylenediamine salt of 5-nitrotetrazole. 8. An explosive composition of matter which consists essentially of the ethylenediamine salt of 5-nitrotetrazole. 9. An explosive composition of matter which comprises a mixture of the ethylenediamine salt of 5-nitrotetrazole and ammonium mixture. 10. The explosive composition of matter as described in claim 9, wherein said mixture is CO 2 balanced. 11. The explosive composition of matter as described in claim 10, wherein said mixture is a eutectic mixture having a eutectic melting temperature of about 110.5 C. 12. The explosive composition of matter as described in claim 11, wherein said ammonium nitrate has a concentration of approximately 87.5 mol%. 13. An explosive composition of matter which consists essentially of a mixture of the ethylenediamine salt of 5-nitrotetrazole and ammonium nitrate. 14. The explosive composition of matter as described in claim 13, wherein said mixture is CO 2 balanced. 15. The explosive composition of matter as described in claim 14, wherein said mixture is a eutectic mixture having a eutectic melting temperature of about 110.5 C. 16. The explosive composition of matter as described in claim 15, wherein said ammonium nitrate has a concentration of approximately 87.5 mol%. 17. An explosive composition of matter which comprises a mixture of the ethylenediamine salt of 5-nitrotetrazole, ammonium nitrate and ethylenediamine dinitrate. 18. The explosive composition of matter as described in claim 17, wherein said mixture is a eutectic mixture having a eutectic melting temperature of about 89.5 C. 19. An explosive composition of matter which consists essentially of a mixture of the ethylenediamine salt of 5-nitrotetrazole, ammonium nitrate and ethylenediamine dinitrate. 20. The explosive composition as described in claim 19, wherein said mixture is a eutectic mixture having a eutectic melting temperature of about 89.5 C. 21. A process for preparing the ethylenediamine salt of 5-nitrotetrazole, which comprises the steps of: a. dissolving sodium nitrite and cupric sulfate in water, forming thereby a first solution: b. dissolving 5-aminotetrazole, cupric sulfate and sulfuric acid in water, forming thereby a second solution; c. adding said second solution to said first solution, forming thereby a third solution; d. basifying said third solution using a solution of sodium hydroxide, forming thereby a fourth solution; e. heating said fourth solution, whereby the copper salt of 5-nitrotetrazole is converted to the sodium salt thereof, and whereby cupric oxide is simultaneously formed and precipitates from said fourth solution; f. removing said precipitated cupric oxide; g. acidifying said fourth solution using an equivalent amount of sulfuric acid, forming thereby a fifth solution; h. extracting said fifth solution using at least one water-insoluble amine dissolved in an organic diluent in which said 5-nitrotetrazole is also soluble, while the ammonium salt of 5-nitrotetrazole precipitates therefrom, producing thereby an organic extract; i. drying said organic extract; j. treating said organic extract with anhydrous ammonia producing thereby an ammonium salt precipitate; k. collecting said ammonium salt precipitate; l. dissolving two equivalents of said dried ammonium salt precipitate in methanol forming thereby a sixth solution; m. adding one equivalent of ethylenediamine to said sixth solution initiating thereby a chemical reaction; n. waiting a sufficient amount of time for said chemical reaction to go to substantial completion; and o. removing said methanol. 22. The process as described in claim 21, wherein said at least one water-insoluble amine for extracting said fifth solution includes trilaurylamine. 23. The process as described in claim 22, wherein said organic diluent includes dichloroethane. 24. The process as described in claim 23, wherein said ammonium salt precipitate is washed with dichloroethane and then dried, producing thereby a first purified ammonium salt precipitate, said first purified ammonium salt precipitate subsequently being stirred with methanol and filtered, and the resulting filtrate evaporated to dryness in order to remove trace amounts of inorganic sulfate, forming thereby a second purified ammonium salt precipitate before performing said step of forming said sixth solution. 25. The process as described in claim 24, wherein said step of dissolving said sodium nitrite includes dissolving an excess of sodium nitrite. 26. The process as described in claim 25, wherein said dissolving of said 5-aminotetrazole, cupric sulfate and sulfuric acid in water to form said second solution is performed with said water being held between about 10 and 15 C. 27. The process as described in claim 26, wherein said basifying of said third solution step is performed such that the final pH of said fourth solution is approximately 9.5. 28. The process as described in claim 27, wherein said fourth solution is heated to approximately 70 C. for about one hour. 29. The process as described in claim 28, wherein said third solution is stirred for approximately one hour and held at about room temperature. 30. A process for preparing the ethylenediamine salt of 5-nitrotetrazole, which comprises the steps of: a. dissolving sodium nitrite and cupric sulfate in water, forming thereby a first solution: b. dissolving 5-aminotetrazole, cupric sulfate and sulfuric acid in water, forming thereby a second solution; c. adding said second solution to said first solution, forming thereby a third solution; d. basifying said third solution using a solution of sodium hydroxide, forming thereby a fourth solution; e. heating said fourth solution, whereby the copper salt of 5-nitrotetrazole is converted to the sodium salt thereof, and whereby cupric oxide is simultaneously formed and precipitates from said fourth solution; f. removing said precipitated cupric oxide: g. acidifying said fourth solution using an equivalent amount of sulfuric acid, forming thereby a fifth solution; h. extracting said fifth solution using at least one water-insoluble amine dissolved in an organic diluent in which said 5-nitrotetrazole is also soluble, while the ethylenediamine salt of 5-nitrotetrazole precipitates therefrom, producing thereby an organic extract; i. drying said organic extract; j. treating said organic extract with ethylendiamine producing thereby an ethylenediamine salt precipitate; and k. collecting said ethylenediamine salt precipitate. 31. The process as described in claim 30, wherein said at least one water-insoluble amine for extracting said fifth solution includes trilaurylamine. 32. The process as described in claim 31, wherein said organic diluent includes dichloroethane. 33. The process as described in claim 32, wherein said step of dissolving said sodium nitrite includes dissolving an excess of sodium nitrite. 34. The process as described in claim 33, wherein said dissolving of said 5-aminotetrazole, cupric sulfate and sulfuric acid in water to form said second solution is performed with said water being held between about 10 and 15 C. 35. The process as described in claim 34, wherein said basifying of said third solution step is performed such that the final pH of said fourth solution is approximately 9.5. 36. The process as described in claim 35, wherein said fourth solution is heated to approximately 70 C. for about one hour. 37. The process as described in claim 36, wherein said third solution is stirred for approximately one hour and held at about room temperature. 38. The process as described in claim 37, wherein said dried ethylenediamine salt precipitate is stirred with methanol and filtered, and the resulting filtrate evaporated to dryness in order to remove trace amounts of sulfate impurities.