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A technology of shock wave and process method, which is applied in the direction of offensive equipment, single substance as explosive, organic chemistry, etc., and can solve the problems of shock wave sensitivity, low mechanical sensitivity and high molding density not involved in DNTF
Active Publication Date: 2018-12-21
XIAN MODERN CHEM RES INST
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Patent ZL201510100531.2 "A Method for Recrystallization of High-quality Elemental Explosives" discloses a mixed explosive prepared from high-quality DNTF as the main explosive with high molding density and low mechanical sensitivity, but does not involve the shock wave sensitivity of DNTF
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Embodiment 1
[0019] This embodiment is carried out with reference to the following composition by weight percentage: 99.5% DNTF crude product, the solvent is 98% concentrated sulfuric acid, and 1% calcium stearate. The preparation method of the present embodiment is as follows:
[0020] 100g level preparation process:
[0021] (1) DNTF dissolved
[0022] Weigh 100g of DNTF crude product and 400g of 98% concentrated sulfuric acid, put them in a 1000mL flask, turn on the mechanical stirring rate to 500r / m, heat in a water bath to 80°C-85°C, and stir at this temperature for 20min.
[0023] (2) DNTF morphology control
[0024] Add 1g of CS, continue to stir for 10min at 80°C to 85°C, and the stirring rate is 1000r / m;
[0025] (3) DNTF crystal precipitation
[0026] Stop heating, reduce the stirring rate to 800r / m, and naturally cool down at room temperature from 20°C to 25°C, and keep it warm for 10 minutes when it reaches 63.5°C to 64°C; strictly control the temperature of the crystalliza...
Embodiment 2
[0032] This embodiment is carried out with reference to the following composition by weight: 99.5% crude DNTF, solvent 98% concentrated sulfuric acid, and 1% sodium dodecylsulfonate. The preparation method of this embodiment refers to embodiment 1.
[0033] Table 1 embodiment performance data
[0034]
[0035]
[0036] It can be seen from the above table that the particle size of the low-shock-wave-sensitivity DNTF elemental explosive prepared by the method of the present invention is reduced and relatively uniform, and the density is slightly improved. Compared with the prior art, the shock wave sensitivity of the mixed explosive based on the DNTF single-substance explosive is significantly reduced, the safety is improved, and the molding density is increased.
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Abstract
The application provides low shock wave sensitivity 3, 4-dinitrofurazanofuroxan (DNTF) and a preparation method thereof. The method takes a synthetic DNTF crude product as a raw material, and adopts asolvent-nonsolvent method to recrystallize the DNTF crude product so as to prepare the low shock wave sensitivity DNTF. The method comprises the steps of taking a solvent and the DNTF crude product according to a mass ratio of 4 to 1, stirring at a speed of 500r / m and heating, and stirring the DNTF for 20min at the temperature of 80-85 DEG C; adding 1% of a crystal form control agent, stirring for 10min at a speed of 1000r / m at the temperature of 80-85 DEG C, and naturally cooling when the stirring speed is reduced to 800r / m; stirring for 10min at the temperature of 63.5-64 DEG C under the condition of heat preservation; controlling the temperature, increasing the stirring speed to 1000r / m, dripping deionized water into the DNTF at a speed of 0.8ml / min, diluting the DNTF solution, and controlling the stirring time to be 60-90min; stopping stirring, carrying out suction filtration, washing, and drying to obtain the low shock wave sensitivity DNTF crystals. The DNTF crystals prepared byusing the recrystallization process method overcome the defect that in the background technology, the DNTF is higher in shock wave sensitivity.
Description
technical field [0001] The invention relates to a recrystallization process for preparing DNTF elemental explosive with low shock wave sensitivity, belonging to the field of explosive synthesis. Background technique [0002] 3,4-Dinitrofurazanylfuroxan (DNTF), as a high-performance third-generation explosive, has higher density, detonation velocity and The thermal and detonation performance is significantly better than Octojin (HMX) and Hexojin (RDX), but close to CL-20. "Research on Performance and Application of High Energy Density Material 3,4-Dinitrofurazanylfuroxan" ("Journal of Arms Industry", No. 2, 2004, P155-158) discloses DNTF elemental explosive, mainly using acetic acid as Solvent and water are used as non-solvent to recrystallize DNTF. The impact sensitivity of recrystallized DNTF is high (96%), but the shock wave sensitivity has not been reported. "Study on Shock Wave Sensitivity and Small-Size Explosion Transfer Performance of DNTF-Based Insensitive Explosiv...
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