Preparation method of benzotrifuroxan (BTF) and 2,4-dinitroanisole (DNAN) cocrystallized explosive
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A technology of benzofurazan and dinitroanisole, which is applied in the field of energetic materials, can solve the problems of preparation without public literature reports, poor fluidity, and low energy, and achieve high product quality, reduced sensitivity, and safety good sex effect
Active Publication Date: 2013-03-27
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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Problems solved by technology
However, because of its high sensitivity, poor fluidity, and difficulty in loading, its application is greatly limited.
2,4-Dinitroanisole (DNAN) is a colorless to yellow needle-like crystal with low sensitivity, low melting point and low cost. It is a new type of casting agent, but its energy is low
At present, there is no published literature report on the preparation of BTF-DNAN co-crystal explosives
Method used
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Embodiment 1
[0027] At room temperature, 50ml of acetone was added into the three-necked flask, and then a sufficient amount of BTF was added under stirring at a temperature of 25°C, dissolved and filtered to obtain a saturated solution of BTF. Then add a sufficient amount of DNAN, stir, dissolve, and filter, and the resulting filtrate is a mixed saturated solution of BTF-DNAN. Put the filtrate in a beaker, then put it still in a thermostat at 30°C, let the solvent evaporate, precipitate crystals, and dry to obtain BTF-DNAN co-crystal explosives.
Embodiment 2
[0029] At room temperature, add 100ml of isopropanol into a three-necked flask, then add a sufficient amount of BTF under stirring, raise the temperature to 40°C, dissolve, and filter to obtain a saturated solution of BTF. Then add a sufficient amount of DNAN, stir, dissolve, and filter, and the resulting filtrate is a mixed saturated solution of BTF-DNAN. Put the filtrate in a beaker, then put it still in a thermostat at 40°C, let the solvent evaporate, precipitate crystals, and dry to obtain the BTF-DNAN co-crystal explosive.
Embodiment 3
[0031] At room temperature, add 80ml of dioxane into the three-necked flask, then add enough BTF under stirring, raise the temperature to 45°C, dissolve and filter to obtain a saturated solution of BTF. Then add a sufficient amount of DNAN, stir, dissolve, filter, and the resulting filtrate is a mixed saturated solution of BTF-DNAN. Put the filtrate in a beaker, then put it still in a thermostat at 45°C, let the solvent evaporate, precipitate crystals, and dry to obtain BTF-DNAN co-crystal explosives.
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Abstract
The invention discloses a preparation method of a benzotrifuroxan (BTF) and 2,4-dinitroanisole (DNAN) cocrystallized explosive. The preparation method comprises the following steps of: (1) preparation of BTF-DNAN saturated solution, namely, adding sufficient quantity of BTF to a crystallization solvent at 20-50 DEG C, dissolving BTF and filtering the solution to obtain the BTF saturated solution; and adding DNAN to the BTF saturated solution to be dissolved and filtering the solution to obtain the BTF-DNAN mixed saturated solution; and (2) preparation of the BTF-DNAN cocrystallized explosive: putting the BTF-DNAN mixed saturated solution into a beaker, then standing in a constant temperature incubator, evaporating the solvent and drying the product, thus obtaining the BTF-DNAN cocrystallized explosive. The preparation method has the beneficial effects that the prepared BTF-DNAN cocrystallized explosive obviously reduces the sensitivity of BTF, obviously improves the energy of DNAN, has excellent detonation property, can serve as a novel insensitive detonating agent and has better application prospect in the insensitive ammunitions resistant to high overload and the like; and the preparation method has the advantages of simple process flow, convenience in operation, mild reaction conditions, good safety and high product quality.
Description
technical field [0001] The invention belongs to the field of energetic materials, and in particular relates to the preparation method of benzofurazan and 2,4-dinitroanisole (BTF-DNAN) eutectic explosive. has a good application prospect. Background technique [0002] The properties of energetic materials (detonation energy, thermal stability, sensitivity) are closely related to the density and melting point of the material. Since the energy and sensitivity of explosives synthesized so far are contradictory, that is, explosives with higher energy may also have higher sensitivity. The serious contradiction between the energy and safety of existing energetic materials restricts their further development and application. At present, methods such as recrystallization, polymer coating and compounding are usually used to modify the existing simple explosives. These traditional modification methods do not change the internal composition and crystal structure of explosives, so the m...
Claims
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Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/04
Inventor 周小清李洪珍杨宗伟张朝阳张祺黄辉聂福德
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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