High-quality single-compound explosive recrystallization method

A simple explosive and recrystallization technology, applied in organic chemistry methods, organic chemistry, etc., can solve the problems of low formability, large particle size, high acidity of DNTF crystals, etc., and achieve the effect of safe production and low mechanical sensitivity

Inactive Publication Date: 2015-06-17
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The recrystallized DNTF crystals have high acidity and large particle size (D 50 =757.081μm), high impact sensitivity (96%), low formability in explosives (relative density 95%) and other shortcomings limit its application

Method used

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  • High-quality single-compound explosive recrystallization method

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Embodiment 1

[0013] This embodiment is carried out with reference to the following composition by weight: 99.5% crude DNTF, ethyl acetate as organic solvent, and 0.5% polyethylene glycol. The preparation method of the present embodiment is as follows:

[0014] (1) DNTF dissolved

[0015] Weigh 100g of crude DNTF and 200g of ethyl acetate, put them in a 1000mL stainless steel container, heat in a water bath to dissolve the crude DNTF, heat the temperature of the water bath to 50°C-60°C, and stir for 30min-60min under high-speed shearing equipment.

[0016] (2) DNTF morphology control

[0017] After the DNTF is completely dissolved, add 0.5% polyethylene glycol, stir at 50°C to 60°C for 30min, and the stirring rate is 2000r / m.

[0018] (3) DNTF crystal precipitation

[0019] Add non-solvent deionized water until the solution is supersaturated, DNTF crystals are precipitated, and vacuum is applied to precipitate all the crystals.

[0020] (4) DNTF crystal drying

[0021] Stop evacuation,...

Embodiment 2

[0024] This embodiment is carried out with reference to the following composition by weight percentage: 99.5% DNTF crude product, organic solvent is ethyl acetate, 0.5% stearic acid. The preparation method of this embodiment refers to embodiment 1.

Embodiment 3

[0026] This embodiment is carried out with reference to the following composition by weight percentage: 99.5% DNTF crude product, organic solvent is acetone, and 0.5% polyethylene glycol. The preparation method of this embodiment refers to embodiment 1.

[0027] Table 1 Example performance data

[0028]

[0029] As can be seen from the above table, the high-quality DNTF explosive prepared by the method of the present invention has a smaller and uniform particle size and low mechanical sensitivity. Compared with the existing technology, the mixed explosive prepared from high-quality DNTF as the main explosive has high molding density, low mechanical sensitivity and good safety.

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Abstract

The invention provides a high-quality single-compound explosive recrystallization method. A synthesized DNTF crude product is taken as a raw material, and is recrystallized in the presence of an organic solvent to prepare high-quality DNTF by adopting a solvent-nonsolvent method. The method comprises the following steps: dissolving DNTF in the organic solvent under the condition that reaction temperature is 50 to 60 DEG C, wherein the mass ratio of the organic solvent and the DNTF crude product is 2:1, adding 0.5 percent of a shape control agent after the DNTF is completely dissolved, and mechanically stirring for 30 min at the stirring speed of 2,000 r/m; adding nonsolvent deionized water to enable the solution to be oversaturated and separate out DNTF crystals for a certain time, vacuumizing, filtering and drying to obtain high-quality DNTF. According to the method, the defects of high mechanical sensitivity and poor formability of a background technology in a recrystallization process are overcome.

Description

technical field [0001] The invention relates to a method for recrystallizing high-quality elemental explosives, which belongs to the field of explosives synthesis. Background technique [0002] 3,4-Dinitrofurazanylfuroxan (DNTF) is a high-density, high-detonation velocity (higher than HMX), high-explosive thermal explosive, and its overall performance is better than that of Octogen (HMX), and close to that of CL-20. For example, "High Energy Density Material 3,4-Dinitrofurazanyl Furazan Performance and Application Research" ("Acta Armaments", No. 2, 2004, P155-158) discloses DNTF elemental explosive, this explosive Mainly use acetic acid as solvent and water as non-solvent to recrystallize DNTF. The recrystallized DNTF crystals have high acidity and large particle size (D 50 =757.081μm), high impact sensitivity (96%), low formability in explosives (relative density 95%) and other shortcomings limit its application. Contents of the invention [0003] In order to overcom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D271/08
CPCC07B2200/13C07D271/08
Inventor 姚李娜赵省向王彩玲王海民戴致鑫刁小强李文祥韩仲熙方伟张为鹏黄亚峰陶俊邢晓玲
Owner XIAN MODERN CHEM RES INST
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