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Refining method of DAOAF (3,3'-diamino-4,4'-azoxy furazan) explosive crystal

A technology of azofurazan oxide and diamino, which is applied in 3 fields, can solve the problems of insensitivity to friction and static sparks, and achieve the effect of easy equipment and simple operation

Inactive Publication Date: 2018-12-11
SOUTHWEAT UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: in order to solve the existing DAOAF insensitivity to impact, friction and static spark insensitivity, the present invention provides a 3,3'-diamino-4,4'-oxo The refinement method of nitrogen furazan explosive crystals, through the rapid removal of solvent by spraying anti-solvent method, and further crushing by stirring and ultrasonic, it is easier to achieve efficient refinement of DAOAF crystal particles

Method used

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  • Refining method of DAOAF (3,3'-diamino-4,4'-azoxy furazan) explosive crystal
  • Refining method of DAOAF (3,3'-diamino-4,4'-azoxy furazan) explosive crystal
  • Refining method of DAOAF (3,3'-diamino-4,4'-azoxy furazan) explosive crystal

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Effect test

Embodiment 1

[0035] Firstly, dissolve the raw material DAOAF in dimethyl sulfoxide DMSO, ultrasonicate according to the ratio of DAOAF(g)3:DMSO(ml)11 until it is completely dissolved into a DAOAF solution, and pour the DAOAF solution into an atomizing nozzle with a diameter of 0.8mm .

[0036] Then turn on the nitrogen to pressurize, the pressure value is 0.6MPa, make the DAOAF solution pass through the atomization nozzle to form small droplets and contact with non-solvent deionized water, and quickly crystallize and precipitate DAOAF particles, and at the same time, ultrasonic and stir at a stirring speed of 450r / min for 45min . Finally filter and dry in vacuo. The particle size and morphology of recrystallized DAOAF were characterized by laser particle size analyzer and SEM.

Embodiment 2

[0038] First, dissolve the raw material DAOAF and DMSO in DMSO, stir according to DAOAF(g)3:DMSO(ml)11 until completely dissolved into a DAOAF solution, and pour the DAOAF solution into an atomizing nozzle with a diameter of 1mm.

[0039] Then turn on the nitrogen to pressurize, the pressure value is 0.6MPa, make the DAOAF solution pass through the atomization nozzle to form droplets and contact with deionized water, ultrasonic and stir at a stirring speed of 450r / min for 45min. Finally the DAOAF particles are crystallized out and dried. Then use scanning electron microscope, laser particle size analysis and other advanced equipment for analysis and characterization.

[0040] Embodiment two:

[0041] First, dissolve the raw material DAOAF and DMSO in DMSO, stir according to DAOAF(g)3:DMSO(ml)11 until completely dissolved into a DAOAF solution, and pour the DAOAF solution into an atomizing nozzle with a diameter of 1.2mm.

[0042] Then turn on the nitrogen to pressurize, the ...

Embodiment 4

[0044] First, dissolve the raw material DAOAF and DMSO in DMSO, stir according to DAOAF(g)3:DMSO(ml)11 until completely dissolved into a DAOAF solution, and pour the DAOAF solution into an atomizing nozzle with a diameter of 0.8mm.

[0045] Then turn on the nitrogen to pressurize, the pressure value is 0.4MPa, make the DAOAF solution pass through the atomization nozzle to form droplets and contact with deionized water, ultrasonic and stir at a stirring speed of 450r / min for 45min. Finally the DAOAF particles are crystallized out and dried. Then use scanning electron microscope, laser particle size analysis and other advanced equipment for analysis and characterization.

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Abstract

The invention relates to the field of energy-containing materials, in particular to a refining method of a DAOAF (3,3'-diamino-4,4'-azoxy furazan) explosive crystal. The refining method comprises thefollowing steps of (1) dissolving the raw materials of DAOAF and DMSO (dimethyl sulfoxide) by ultrasonic waves to form a DAOAF solution, and pouring the DAOAF solution into an atomizing spray head; (2) opening nitrogen gas to pressurize, enabling the DAOAF solution to form small mist droplets by the atomizing spray head, enabling the small mist droplets to be in contact with a non-solvent, stirring by the ultrasonic waves, and quickly crystallizing and separating DAOAF particles; (3) stirring the DAOAF particles by ultrasonic waves, filtering, and drying under the vacuum condition; (4) enabling a laser granularity meter and a SEM (scanning electron microscope) to perform granularity and morphology characterization on the re-crystallized DAOAF particles. The refining method has the advantages that the solvent can be quickly removed by a spray anti-solvent method, the materials are further crushed by stirring and ultrasonic waves, and the DAOAF crystal particles can be easily refined athigh efficiency; the refined DAOAF has better development prospect in the fields of slapper detonator primers, high-energy mixed explosives, and high-energy solid propellants.

Description

technical field [0001] The invention relates to the field of energetic materials, in particular to a method for refining the crystals of 3,3'-diamino-4,4'-azofurazan explosives. Background technique [0002] Shock plate detonators used in nuclear weapons are detonating tools with high performance and high safety. The starting charge for shock plate detonators should have the characteristics of low sensitivity, good performance, low detonation threshold, high detonation energy and good thermal stability. 3,3'-Diamino-4,4'-azofurazan (DAOAF) is a typical representative of furazan explosives. But DAOAF is insensitive to impact insensitivity, friction and static sparks. In recent years, various explosives such as RDX (cyclotrimethylene / trinitramine, commonly known as RDX), HMX, HNS (hexanitrophenone) and TATB (trinitro-triaminobenzene) have been formed and developed at home and abroad. Appearance and granularity control. But so far there are no related reports on the morphol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D271/08
CPCC07D271/08
Inventor 索志荣姚笑璐黄明张勇谭明
Owner SOUTHWEAT UNIV OF SCI & TECH
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