Induced crystallization method of ammonium salt

A technology for inducing crystallization and ammonium salt, which is applied in the directions of ammonium perchlorate composition, the generation of compressed gas, the composite component of explosives, etc. Impact sensitivity reduction effect

Inactive Publication Date: 2018-08-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to existing research, there are certain problems in the current application process of these two types of oxidants: the sensitivity of ammonium dinitramide is high, and there is a greater risk in the process of storage and transportation, and dinitramide prepared according to conventional methods Ammonium (ADN) is mostly irregular needle-like crystals, which are easy to aggregate and have extremely adverse effects on the rheological properties of the slurry and the combustion performance of the propellant during the preparation of the propellant; ammonium perchlorate is Since most of the granulation methods currently used are mechanical pulverization, the resulting products are mostly irregular particles, which is difficult to meet the needs of further increasing the filling density of propellants
These methods play a certain role in reducing the sensitivity, but the effect is not very obvious, and these methods are costly and cumbersome.

Method used

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  • Induced crystallization method of ammonium salt
  • Induced crystallization method of ammonium salt
  • Induced crystallization method of ammonium salt

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Preparation graphene mass fraction is the graphene / ADN composite material of 2.5‰ (graphene accounts for graphene and ADN total mass percentage), the inorganic energy-containing ammonium salt in the present embodiment is ADN, good solvent is ethanol, and poor solvent to dichloromethane.

[0021] The first step is to prepare a graphene dispersion. According to the calculation, add 11.2mg graphene and 150ml dichloromethane into the flask, and ultrasonically disperse for 6 hours under the condition of constant stirring at 150r / min. The ultrasonic dispersion power is 40W. After 0.5h, a graphene / dichloromethane dispersion was obtained.

[0022] The second step is to prepare an ADN / ethanol solution, completely dissolving 3g of ADN in 15ml of ethanol, stirring and dissolving at a temperature of 60°C, the magnetic stirring rate is 500r / min, and the concentration is close to saturation.

[0023] In the third step, take 2 / 3 of the upper graphene dispersion in the first step in a...

Embodiment 2

[0025] Preparation graphene mass fraction is the graphene / AP composite material of 5‰ (the percentage that graphene accounts for graphene and AP total mass), the inorganic energy-containing ammonium salt in the present embodiment is AP, and good solvent is deionized water, The poor solvent is ethanol.

[0026] The first step is to prepare a graphene dispersion. According to the calculation, add 22.5mg of graphene and 150ml of ethanol into the flask, ultrasonically disperse for 6h under the condition of constant stirring at 150r / min, the ultrasonic dispersion power is 40W, and stand for 0.5h after the dispersion , to obtain a graphene / ethanol dispersion.

[0027] The second step is to prepare AP / deionized water solution, completely dissolve 3gAP in 15ml deionized water, stir and dissolve at a temperature of 60°C, the magnetic stirring rate is 500r / min, and the concentration is close to saturation.

[0028] In the third step, take 2 / 3 of the upper graphene dispersion in the fir...

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Abstract

The invention relates to an induced crystallization method of an ammonium salt and belongs to the field of processing and preparation of materials. The method comprises the following steps: taking graphene and an energy-containing inorganic ammonium salt as raw materials, carrying out induced crystallization and compounding the energy-containing organic ammonium salt on graphene to prepare a graphene / energy-containing inorganic ammonium salt composite material; the morphology of the inorganic ammonium salt can be effectively improved; and the safety of the energy-containing inorganic ammoniumsalt can be improved.

Description

technical field [0001] The invention relates to a method for inducing crystallization by an energetic inorganic ammonium salt, which belongs to the field of material processing and preparation. Background technique [0002] At present, ammonium perchlorate (AP) is the most widely used oxidant in composite solid propellants, and with the increasing attention to the characteristics of high energy, low sensitivity and low characteristic signal of propellants, ammonium dinitramide (ADN) is regarded as As the most potential next-generation high-energy oxidant: ammonium dinitramide does not contain halogen elements, has high oxygen and nitrogen content, and has a high oxygen balance, which can meet the needs of low characteristic signals of composite solid propellants. However, according to existing research, there are certain problems in the current application process of these two types of oxidants: the sensitivity of ammonium dinitramide is high, and there is a greater risk in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C06B21/00C06B29/22C06B25/34C06D5/06
CPCC06B21/0008C06B23/005C06B25/34C06B29/22C06D5/06
Inventor 李建民郭延佩周续源杨荣杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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