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Preparation method of TNBA/TNAZ eutectic mixture

A technology of eutectics and injectors, which is applied in the direction of nitrated acyclic/alicyclic/heterocyclic amine explosive compositions, offensive equipment, explosives processing equipment, etc., can solve the problems of difficult control of eutectic particle size, solvent waste, Environmental protection and other issues, to achieve the effect of easy operation, process simplification, and reduction of heating process

Active Publication Date: 2022-07-01
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core process of the solvent anti-solvent method is to quickly and strongly mix the energetic material solution with a large amount of anti-solvent under certain conditions, so that the solution reaches a supersaturated state in a very short time and rapidly precipitates a eutectic. The particle size of the eutectic is not easy to control, and it is easy to cause waste of solvent during the precipitation process, which is not environmentally friendly

Method used

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  • Preparation method of TNBA/TNAZ eutectic mixture
  • Preparation method of TNBA/TNAZ eutectic mixture
  • Preparation method of TNBA/TNAZ eutectic mixture

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment relates to the preparation of a eutectic with a mass ratio of TNBA / TNAZ of 1:9, see figure 1 shown, the specific steps are as follows:

[0034] At room temperature, 2,4,6-trinitro-3-bromoanisole and 1,3,3-trinitroazetidine were added to 5.08 mL of acetone as an organic solvent to prepare the mass fraction as a 20% solution. Wherein: the mass ratio of TNBA and TNAZ is 1:9, and the total mass is 1g;

[0035] After withdrawing the precursor solution with a 10 ml syringe with a 20G stainless steel flat-tipped needle, the syringe was placed in the syringe pump. Connect the voltage generator, the positive terminal is connected to the needle, and the negative terminal is connected to the receiver board. Cover the receiving plate with tin foil at 13kV, 4.8ml / h injection rate and 15cm to receive the product; after drying, the eutectic can be obtained.

Embodiment 2

[0037] This embodiment relates to the preparation of a eutectic with a mass ratio of TNBA / TNAZ of 3:7, see figure 1 shown, the specific steps are as follows:

[0038] At room temperature, 2,4,6-trinitro-3-bromoanisole and 1,3,3-trinitroazetidine were added to 3.81 mL of acetone as an organic solvent, and the mass fraction was 25% solution. Wherein: the mass ratio of TNBA and TNAZ is 3:7, and the total mass is 1g;

[0039] After withdrawing the precursor solution with a 5 ml syringe with a 20G stainless steel flat-tipped needle, the syringe was placed in the syringe pump. Connect the voltage generator, the positive terminal is connected to the needle, and the negative terminal is connected to the receiver board. The product was received by covering the receiving plate with tin foil at 11 kV voltage, 4.5 mL / h injection rate and 13 cm. The eutectic is obtained after drying.

Embodiment 3

[0041] This embodiment relates to the preparation of a eutectic with a mass ratio of TNBA / TNAZ of 5:5, see figure 1 shown, the specific steps are as follows:

[0042] At room temperature, 2,4,6-trinitro-3-bromoanisole and 1,3,3-trinitroazetidine were added to 4.44 mL of acetone as an organic solvent, and the mass fraction was 30% solution. Wherein: the mass ratio of TNBA and TNAZ is 5:5, and the total mass is 1.5g;

[0043]After withdrawing the precursor solution with a 5ml syringe with a 19G stainless steel flat-tipped needle, place the syringe in the syringe pump. Connect the voltage generator, the positive terminal is connected to the needle, and the negative terminal is connected to the receiver board. The product was received by covering the receiving plate with tin foil at 9 kV, 4 mL / h injection rate and 12 cm. The eutectic is obtained after drying.

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Abstract

The invention provides a preparation method of a TNBA / TNAZ eutectic mixture. Comprising the following steps: step 1, preparing a solution: grinding 2, 4, 6-trinitro-3-bromoanisole and 1, 3, 3-trinitroazetidine by using a mortar, pouring into an organic solvent, and stirring to prepare a precursor solution; and 2, electrostatic spraying: extracting the precursor solution by using an injector, placing the precursor solution in an injection pump, connecting with a voltage generator, receiving a product by using tin foil paper, and drying to obtain the product. The electrostatic spraying method is adopted, the process is simple and easy to operate, and the morphology and the particle size of the eutectic particles can be controlled by adjusting electrostatic spraying parameters. The eutectoid prepared by the method is relatively good in performance consistency, uniform in particle size distribution and relatively narrow in particle size distribution and can reach the nanoscale, and the phenomena that the performance of different batches of eutectoid prepared by a traditional melting method is inconsistent and the particle size is non-uniform when a solvent anti-solvent method is used for preparing the eutectoid are effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of explosive improvement; in particular, it relates to a preparation method of a TNBA / TNAZ eutectic. Background technique [0002] Melting and casting explosives have the advantages of simple process and low production cost, and are currently the most widely used mixed explosives. The molten-cast explosives with TNT as the carrier used to account for more than 90% of the military mixed explosives. The traditional insensitive melting and casting explosives using TNT as the melting and casting carrier have problems such as toxicity, poor safety performance, unsatisfactory detonation performance, easy oil leakage, brittleness and shrinkage holes of the charge, which can no longer meet the requirements of modern insensitive ammunition. Therefore, the problem of finding a liquid-phase casting carrier to replace TNT needs to be solved urgently. There are two solutions today: one is to continue to find or synthes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B21/00C06B25/34
CPCC06B21/0008C06B25/34
Inventor 宋小兰于志宏王毅寇勇安崇伟
Owner ZHONGBEI UNIV
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