N-carbamimidoyl-2-fluoro-2,2-dinitroacetimidamides high-energy ionic salts and methods for their preparation

Abstract

The application relates to a high-energy ion salt of N-formamidinyl-2-fluoro-2,2-dinitroacetimidamide and a preparation method thereof. The preparation method comprises the following steps: using FOX-7 as raw material, performing fluorination reaction on the FOX-7 by using a fluorination reagent selectfluor, and further reacting to prepare a tetrafluoroborate salt of N-formamidinyl-2-fluoro-2,2-dinitroacetimidamide, and then performing separation, purification and crystallization on the product. Secondly, ion exchange is performed on the tetrafluoroborate salt of N-formamidinyl-2-fluoro-2,2-dinitroacetimidamide, and the tetrafluoroborate salt is reacted with potassium nitrate, potassium perchlorate and potassium dinitramide respectively to prepare corresponding nitrate, perchlorate and dinitramide salts of N-formamidinyl-2-fluoro-2,2-dinitroacetimidamide. The tetrafluoroborate salt, the nitrate, the perchlorate and the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetimidamide provided by the application can be used as novel high-energy compounds in the fields of solid propellants, launching charges and composite explosives.

Description

Technical Field

[0001] This invention relates to the field of energetic materials synthesis technology, and more specifically, to a high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide and its preparation method. Background Technology

[0002] Energetic materials, under certain conditions, can undergo redox reactions and release energy (usually accompanied by gas production and heat release). Modern energetic materials mainly include explosives, propellants, and pyrotechnics, and are widely used in weaponry and aerospace. The continuous development of energetic materials technology has driven the modernization of modern national defense and weaponry.

[0003] To develop novel energetic materials, the introduction of the element F into traditional C, H, O, and N-type energetic compounds is being considered. F possesses extremely strong oxidizing and electronegativity properties, enabling it to form stable single bonds with C atoms. Furthermore, F atoms can react with metallic fuel particles such as aluminum particles in solid propellants, promoting propellant combustion and energy release.

[0004] As energetic materials technology has developed to its current stage, fourth-generation energetic materials, while pursuing higher energy, also require a certain level of safety. 1,1-Diamino-2,2-dinitroethylene (FOX-7) is a synthetic elemental high explosive, with a molecular skeleton composed of a central vinyl group and symmetrical nitro and amino groups on both sides. FOX-7's conjugated system and closely packed molecular structure give it excellent overall performance of high energy and low sensitivity.

[0005] No relevant reports have been found at home or abroad regarding the direct fluorination of FOX-7. This patent describes the direct fluorination of FOX-7 to prepare a high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and to synthesize a high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide, which has the advantages of high density, strong thermal stability and good energy performance.

[0007] The molecular structural formula of the high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide provided by this invention is as follows:

[0008]

[0009] M - BF4 - NO3 - ClO4 - N(NO2)2 - C(NO2)3 - or N3- .

[0010] The peak decomposition temperature of the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is 161℃; the peak thermal decomposition temperature of the nitrate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is 155.3℃; the peak thermal decomposition temperature of the perchlorate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is 170.8℃; and the peak thermal decomposition temperature of the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is 193℃. At 6℃, the CO2 oxygen balance of tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is -16%; the CO2 oxygen balance of perchlorate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is -1.9%; the CO2 oxygen balance of nitrate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is -8.85%; and the CO2 oxygen balance of dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is -2.54%.

[0011] The synthetic route for the high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide is as follows:

[0012] .

[0013] This invention provides a method for preparing the above-mentioned high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide, comprising the following steps:

[0014] S1. Using FOX-7 as a raw material, fluorination was carried out with a fluorinating agent at room temperature to obtain the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 1).

[0015] S2. The tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide was dissolved in anhydrous diethyl ether, filtered, dried, and recrystallized to finally obtain crystals of the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide.

[0016] In step S1, the fluorinating agent is Selectfluor.

[0017] The molar ratio of FOX-7 to Selectfluor is (1:2) to (1:6);

[0018] The reaction solvent is anhydrous acetonitrile. The amount of anhydrous acetonitrile used is determined based on the amount of FOX-7 added. When the amount of FOX-7 added is 10g, the amount of anhydrous acetonitrile used is 240mL (188.64g). The mass ratio of FOX-7 to acetonitrile is 1:18~1:30.

[0019] The reaction temperature is 5-25℃, and the reaction time is 12-48 h.

[0020] In step S2 of this invention, the recrystallization reagent is anhydrous diethyl ether. The amount of anhydrous diethyl ether is determined based on the amount of FOX-7 fed. When the amount of FOX-7 fed is 10g, the amount of anhydrous diethyl ether is 500mL, and the mass ratio of FOX-7 to diethyl ether is 1:30~1:40.

[0021] The method for preparing the nitrate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide of the present invention includes the following steps:

[0022] The tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide was treated with an aqueous potassium nitrate solution to obtain the nitrate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide.

[0023] The concentration of the potassium nitrate aqueous solution is 0.1~0.2 g / mL, the molar ratio of potassium nitrate to N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide tetrafluoroborate is 1:1, and the reaction temperature is 5-25℃.

[0024] The method for preparing the perchlorate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide of the present invention includes the following steps:

[0025] The tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide was treated with an aqueous solution of potassium perchlorate to obtain the perchlorate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide.

[0026] The concentration of the potassium perchlorate aqueous solution is 0.005-0.01 g / mL, the molar ratio of potassium perchlorate to N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide tetrafluoroborate is 1:1, and the reaction temperature is room temperature (5-25℃).

[0027] The method for preparing the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide of the present invention includes the following steps: treating the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide with an aqueous solution of potassium dinitramide (KDN) to obtain the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide.

[0028] The concentration of the potassium dinitramide aqueous solution is 0.01-1.0 g / mL, the molar ratio of potassium dinitramide to N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide tetrafluoroborate is 1:1, and the reaction temperature is room temperature (5-25℃).

[0029] The present invention has the following beneficial effects:

[0030] This invention provides a high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide and its preparation method, including nitrates, perchlorates, and dinitramide salts of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide. The high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide provided by this invention exhibits excellent physicochemical properties: high density (the density of the perchlorate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 3) is 1.875 g / cm³). 3 The dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 4) has a density of 1.770 g / cm³. 3 It exhibits strong thermal stability (the peak thermal decomposition temperature of the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide (compound 4) is 193.6℃) and good energy performance (the enthalpy of formation of the nitrate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide (compound 2) is 187.57 KJ / mol, the enthalpy of formation of the perchlorate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide (compound 3) is 223.21 KJ / mol, and the enthalpy of formation of the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide (compound 4) is 491.56 KJ / mol. The detonation velocity of compound 4 is 9233.55 m / s, and the detonation pressure is 36.82 GPa).

[0031] The high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide contains a fluorinated dinitromethyl structure. Introducing fluorine into the propellant system is beneficial to improving the combustion efficiency of metallic fuels (aluminum and boron) in solid propellants, and has great application potential in the field of propellants. Attached Figure Description

[0032] Figure 1 Crystal data for the tetrafluoroborate (compound 1) of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide;

[0033] Figure 2 The single-crystal structure diagram of the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 1);

[0034] Figure 3 The infrared spectrum of the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 1);

[0035] Figure 4The infrared spectrum of the nitrate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 2);

[0036] Figure 5 The infrared spectrum of perchlorate (compound 3) of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide;

[0037] Figure 6 The infrared spectrum of the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 4);

[0038] Figure 7 Thermal decomposition curve of tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 1);

[0039] Figure 8 shows the thermal decomposition curve of the nitrate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 2);

[0040] Figure 9 Thermal decomposition curve of perchlorate (compound 3) of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide;

[0041] Figure 10 Thermal decomposition curves of the dinitramide salt (compound 4) of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide. Detailed Implementation

[0042] The present invention further illustrates the preparation of tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 1) using the following Examples 1-4.

[0043] Example 1: The molar ratio of FOX-7 to Selectfluor is 1:2.5.

[0044] 10 g (0.068 mol) of FOX-7 was dispersed in 240 mL (4.6 mol) of anhydrous acetonitrile, and 60 g (0.169 mol) of Selectfluor was added. The mixture was stirred at 5 °C for 36 h. During the reaction, the pale yellow suspension gradually faded to a colorless solution, and then a white solid gradually precipitated. The reaction was confirmed to be complete by TLC. The solid-liquid mixture was filtered to obtain a filtrate. The filtrate was then evaporated by rotary evaporation to remove a large amount of solvent. The solid was then eluted with anhydrous diethyl ether (500 mL; 4.81 mol). The diethyl ether was evaporated to obtain 13.1 g of the solid product N-formamidinyl-2-fluoro-2,2-dinitroacetylimineamide tetrafluoroborate, with a yield of 65.1%.

[0045] Crystal data for the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 1) are shown in [reference needed]. Figure 1 The single-crystal structure of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide tetrafluoroborate (compound 1) is shown in [reference needed]. Figure 2 Infrared (KBr; cm) -1 ): 3076.08; 1694.10; 1652.33; 1603.81; 1518.11; 1421.02; 1384.33; 1355.00; 1315.40; 1250.61; 1069.76; 1037.80; 808.39; 797.63; 623.16; 533.71; 521.87; 487.92. (See) Figure 3 The thermal decomposition curve of the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 1) (see...) Figure 7 ).

[0046] Example 2: The molar ratio of FOX-7 to Selectfluor is 1:4.

[0047] 10 g (0.068 mol) of FOX-7 was dispersed in 240 mL (4.6 mol) of anhydrous acetonitrile, and 96 g (0.272 mol) of Selectfluor was added. The mixture was stirred at 10 °C for 28 h. During the reaction, the pale yellow suspension gradually faded to a colorless solution, and then a white solid gradually precipitated. The reaction was confirmed to be complete by TLC. The solid-liquid mixture was filtered to obtain a filtrate. The filtrate was then evaporated by rotary evaporation to remove a large amount of solvent. The solid was then eluted with anhydrous diethyl ether (500 mL; 4.81 mol). The diethyl ether was evaporated to obtain 15.8 g of the solid product N-formamidinyl-2-fluoro-2,2-dinitroacetylimineamide tetrafluoroborate, with a yield of 78.5%.

[0048] Example 3: The molar ratio of FOX-7 to Selectfluor is 1:5.

[0049] 10 g (0.068 mol) of FOX-7 was dispersed in 240 mL of anhydrous acetonitrile, and 120 g (0.34 mol) of Selectfluor was added. The mixture was stirred at 5 °C for 24 h. During the reaction, the pale yellow suspension gradually faded to a colorless solution, and then a white solid gradually precipitated. The reaction was confirmed to be complete by TLC. The solid-liquid mixture was filtered to obtain a filtrate. The filtrate was then evaporated by rotary evaporation to remove a large amount of solvent. The solid was then eluted with anhydrous diethyl ether (500 mL; 4.81 mol). The diethyl ether was evaporated to obtain 16.3 g of the solid product N-formamidinyl-2-fluoro-2,2-dinitroacetylimineamide tetrafluoroborate, with a yield of 81%.

[0050] Example 4: The molar ratio of FOX-7 to Selectfluor is 1:6.

[0051] 10 g (0.068 mol) of FOX-7 was dispersed in 240 mL of anhydrous acetonitrile, and 144 g (0.408 mol) of Selectfluor was added. The mixture was stirred at 5 °C for 24 h. During the reaction, the pale yellow suspension gradually faded to a colorless solution, and then a white solid gradually precipitated. The reaction was confirmed to be complete by TLC. The solid-liquid mixture was filtered to obtain a filtrate. The filtrate was then evaporated by rotary evaporation to remove a large amount of solvent. The solid was then eluted with anhydrous diethyl ether (500 mL; 4.81 mol). The diethyl ether was evaporated to obtain 16.1 g of the solid product N-formamidinyl-2-fluoro-2,2-dinitroacetylimineamide tetrafluoroborate, with a yield of 80%.

[0052] Example 5: Preparation of nitrate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 2).

[0053] The solid N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide tetrafluoroborate (0.3 g, 0.001 mol) obtained in Example 2 was dissolved in 1 mL of deionized water, and a prepared potassium nitrate aqueous solution (KNO3 (0.1 g; 0.001 mol) dissolved in 1 mL of deionized water) was added. The mixture was stirred for 30 min, and 6 mL of ethanol was added. KBF4 white solid precipitated at 5-25 °C. The solvent was removed by rotary evaporation to obtain 0.17 g of solid N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide nitrate, with a yield of 63%.

[0054] Infrared (KBr; cm) -1 ): 3375.37; 2426.40; 2197.35; 1666.36; 1611.64; 1514.10; 1384.18; 1345.03; 1258.75; 1073.71; 1048.31; 921.61; 825.72; 801.99; 613.80. (See) Figure 4 The thermal decomposition curve of the nitrate (2) of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (see) Figure 8 );

[0055] Example 5: Preparation of perchlorate (compound 3) of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide.

[0056] The solid N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide tetrafluoroborate (0.3 g, 0.001 mol) obtained in Example 2 was dissolved in 1 mL of deionized water, and a prepared potassium perchlorate aqueous solution (0.13 g; 0.001 mol; KClO4 dissolved in 10 mL of deionized water) was added. The mixture was stirred for 20 min, and 30 mL of ethanol was added. The mixture was stirred overnight, and KBF4 white solid precipitated. The solvent was removed by rotary evaporation to obtain 0.20 g of solid N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide perchlorate, with a yield of 65%.

[0057] Infrared (KBr; cm) -1 ): 3480.90; 3234.58; 3076.99; 2195.28; 1694.01; 1653.65; 1615.91; 1518.32; 1451.67; 1421.14; 1384.41; 1316.06; 1250.74; 1144.82; 1112.13; 1090.06; 1031.61; 808.65; 797.53; 637.08; 627.56; 544.97; 488.80. (See) Figure 5 The thermal decomposition curve of perchlorate (3) of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (see) Figure 9 ).

[0058] Example 6: Preparation of the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 4).

[0059] The solid N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide tetrafluoroborate (0.3 g, 0.001 mol) obtained in Example 2 was dissolved in 1 mL of deionized water, and an aqueous solution of potassium dinitramide (0.13 g; 0.001 mol; KCIO4 dissolved in 1 mL of deionized water) was added. The mixture was stirred for 20 min, and 10 mL of ethanol was added. The mixture was allowed to stand in a refrigerator for 3 h, and white solid KBF4 precipitated. The solvent was removed by rotary evaporation to obtain 0.25 g of solid N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide dinitramide salt, with a yield of 76%.

[0060] Infrared (KBr; cm) -1 ): 3448.04; 3387.88; 2195.64; 1669.52; 1604.65; 1526.12; 1451.90; 1384.59; 1345.03; 1313.17; 1252.44; 1198.29; 1028.68; 800.19; 586.90. (See) Figure 6The thermal decomposition curve of the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 4) (see) Figure 10 ).

[0061] Example 7: Performance prediction of the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide (compound 4) in energetic materials applications. The detonation performance of compound 4 was calculated using EXPLO5, based on the density of compound 4 of 1.77 g / cm³. 3 With basic parameters such as molar mass 315.14 and enthalpy of formation 491.56 kJ / mol, the detonation pressure of compound 4 was calculated to be 36.82 GPa and the detonation velocity to be 9233.55 m / s using EXPLO5. Its detonation performance is significantly better than that of common propellant oxidizer energetic materials FOX-7 (theoretical detonation pressure 34.0 GPa, detonation velocity 8870 m / s) and ADN (theoretical detonation pressure 25.54 GPa, detonation velocity 8090 m / s).

Claims

1. N-carbamimidoyl-2-fluoro-2,2-dinitroacetimidamidate high-energy ionic salt, characterized in that The molecular structural formula of the high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide is as follows: ； M - BF4 - , NO3 - , ClO4 - , N(NO2)2 - , C(NO2)3 - or N3 - .

2. The N-carbamimidoyl-2-fluoro-2,2-dinitroacetimidamido amide energetic ionic salt according to claim 1, characterized in that, Its features are: The peak decomposition temperature of the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is 161℃; the peak thermal decomposition temperature of the nitrate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is 155.3℃; the peak thermal decomposition temperature of the perchlorate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is 170.8℃; and the peak thermal decomposition temperature of the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is 193℃. At 6℃, the CO2 oxygen balance of tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is -16%; the CO2 oxygen balance of perchlorate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is -1.9%; the CO2 oxygen balance of nitrate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is -8.85%; and the CO2 oxygen balance of dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimideamide is -2.54%.

3. A method for preparing a high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide, characterized in that, Includes the following steps: S1. Using FOX-7 as a raw material, fluorination with a fluorinating agent is carried out at room temperature to obtain the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide. S2. The tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide was dissolved in anhydrous diethyl ether, filtered, dried, and recrystallized to finally obtain crystals of the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide.

4. The method for preparing the high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide according to claim 3, characterized in that: S1 and FOX-7 were dispersed in anhydrous acetonitrile, and a fluorinating agent was added. The mixture was stirred at 5℃-25℃ for 12-48 h. During the reaction, the pale yellow suspension gradually faded and became a colorless solution. Then, a white solid gradually precipitated out, and the reaction ended. S2. Filter the solid-liquid mixture to obtain a filtrate. Rotary evaporate the filtrate to remove a large amount of solvent. Then, wash the solid with anhydrous diethyl ether and remove the diethyl ether by volatilization to obtain the solid product N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide tetrafluoroborate.

5. The method for preparing the high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide according to claim 3, characterized in that, In step S1, the fluorinating agent is Selectfluor. The molar ratio of FOX-7 to Selectfluor is (1:2) to (1:6); The reaction solvent is anhydrous acetonitrile. The amount of anhydrous acetonitrile used is determined based on the amount of FOX-7 added. The mass ratio of FOX-7 to acetonitrile is 1:18 to 1:

30. The reaction temperature is 5-25℃, and the reaction time is 12-48 h.

6. The method for preparing the high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide according to claim 3, characterized in that, In step S2, the recrystallization reagent is anhydrous diethyl ether. The amount of anhydrous diethyl ether used is determined based on the amount of FOX-7 fed in, and the mass ratio of FOX-7 to diethyl ether is 1:30 to 1:

40.

7. A method for preparing a high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide, characterized in that, Includes the following steps: The tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide was treated with an aqueous potassium nitrate solution to obtain the nitrate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide. The concentration of the potassium nitrate aqueous solution is 0.1~0.2 g / mL, the molar ratio of potassium nitrate to N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide tetrafluoroborate is 1:1, and the reaction temperature is 5-25℃.

8. A method for preparing a high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide, characterized in that, Includes the following steps: The tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide was treated with an aqueous solution of potassium perchlorate to obtain the perchlorate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide. The concentration of the potassium perchlorate aqueous solution is 0.005-0.01 g / mL, the molar ratio of potassium perchlorate to N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide tetrafluoroborate is 1:1, and the reaction temperature is 5-25℃.

9. A method for preparing a high-energy ionic salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide, characterized in that, The process includes the following steps: treating the tetrafluoroborate of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide with an aqueous solution of potassium dinitramide (KDN) to obtain the dinitramide salt of N-formamidinyl-2-fluoro-2,2-dinitroacetylimide amide; The concentration of the potassium dinitramide aqueous solution is 0.01-1.0 g / mL, the molar ratio of potassium dinitramide to N-formamidinyl-2-fluoro-2,2-dinitroacetylimine amide tetrafluoroborate is 1:1, and the reaction temperature is 5-25℃.

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