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Method for preparing ammonium perchlorate-metal salt composite based on sodium alginate curing

A technology of ammonium perchlorate and sodium alginate, which is applied in the direction of ammonium perchlorate composition, offensive equipment, compressed gas generation, etc., can solve the problem of high decomposition temperature, achieve early decomposition temperature, mild conditions, and broad application prospects Effect

Active Publication Date: 2019-06-11
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although the technology or method of modifying ammonium perchlorate reported in the literature has solved one or two of the problems of high decomposition temperature, high sensitivity, and easy moisture absorption of AP to a certain extent, the current literature on solving the above three problems at the same time or patents rarely reported

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  • Method for preparing ammonium perchlorate-metal salt composite based on sodium alginate curing

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Effect test

Embodiment 1

[0028] A method for preparing ammonium perchlorate-metal salt composite based on sodium alginate solidification, comprising the following steps:

[0029] Step 1. Disperse 1g of sodium alginate and 9g of ammonium perchlorate in 50mL of deionized water at a certain temperature and set aside;

[0030] Step 2, dissolving 2 g of cobalt nitrate in 20 mL of deionized water to obtain a cobalt nitrate solution for use;

[0031] Step 3. After absorbing the solution in step 1 with a syringe, disperse it in the cobalt nitrate solution in a dropwise manner to obtain a dispersion liquid;

[0032] Step 4: solidify the dispersion liquid, filter, wash, and dry at room temperature to obtain the compound. A thermal decomposition experiment was carried out on the compound, in which the decomposition temperature of ammonium perchlorate dropped to 324.8°C; in this experiment, ammonium perchlorate and sodium alginate were evenly compounded together in an aqueous solution, and sodium alginate and hi...

Embodiment 2

[0034] A method for preparing ammonium perchlorate-metal salt composite based on sodium alginate solidification, comprising the following steps:

[0035] Step 1. Disperse 1g of sodium alginate and 15g of ammonium perchlorate in 50mL of deionized water at a certain temperature and set aside;

[0036] Step 2, dissolving 2 g of copper nitrate in 30 mL of deionized water to obtain a copper nitrate solution for use;

[0037] Step 3, after absorbing the solution in step 1 with a syringe, disperse it in the copper nitrate solution in a dropwise manner to obtain a dispersion liquid;

[0038] Step 4: solidify the dispersed material, filter, wash, and freeze-dry to obtain the compound. The compound was subjected to thermal decomposition experiments, in which the decomposition temperature of ammonium perchlorate dropped to 330.8°C.

Embodiment 3

[0040] A method for preparing ammonium perchlorate-metal salt composite based on sodium alginate solidification, comprising the following steps:

[0041] Step 1. Disperse 0.5g of sodium alginate and 9g of ammonium perchlorate in 50mL of deionized water at a certain temperature, and set aside;

[0042] Step 2, dissolving 1 g of cobalt nitrate and 1 g of copper nitrate in 20 mL of deionized water to obtain a metal salt solution for use;

[0043] Step 3. Disperse the solution in step 1 in petroleum ether, stir it magnetically, and after forming a stable water-in-oil, slowly add the metal salt solution in step 2 dropwise to obtain a dispersed material liquid;

[0044] Step 4: solidify the dispersed material, filter, wash, and freeze-dry to obtain the compound. The compound was subjected to thermal decomposition experiments, in which the decomposition temperature of ammonium perchlorate dropped to 327.2°C.

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Abstract

The invention discloses a method for preparing an ammonium perchlorate-metal salt compound based on sodium alginate solidification. The compound realizes the in-situ high efficiency catalysis of the thermal decomposition of ammonium perchlorate. The method comprises the following steps: dissolving one or more of bivalence or higher-valence metal ion salts in an appropriate solvent; and dissolving sodium alginate or ammonium perchlorate in deionized water at a certain temperature, dispersing the obtained aqueous solution in the above obtained metal salt solution after the sodium alginate or ammonium perchlorate is fully dissolved, and filtering, washing and drying the above obtained dispersion after the dispersion is solidified in order to obtain the compound. The prepared compound has a greatly lower decomposition temperature than the raw material ammonium perchlorate, and can be thermally decomposed at 300 DEG C or below; and the compound has a lower sensitivity and remarkably better hygroscopicity than the raw material ammonium perchlorate. The preparation method has the advantages of simple process, mild conditions, low cost, good safety and reliability, and realization of batch production, and has a broad application prospect in the field of rocket propellants when used as the preparation method of the ammonium perchlorate / metal salt compound.

Description

technical field [0001] The invention belongs to material modification technology, in particular to a method for preparing ammonium perchlorate-metal salt compound based on sodium alginate solidification. Background technique [0002] Ammonium perchlorate (AP) is the main oxidant in composite solid propellants, modified double-base propellants and NEPE propellants, which can account for more than 70% of the total. It has high effective oxygen content, high density, and other components. It has the advantages of good compatibility, high gas generation, large enthalpy of formation, and low cost (Acta Explosives, 2000, 23(3): 9-14). Its thermal decomposition performance has an important influence on the combustion process of the propellant. Studies have shown that the thermal decomposition activation energy, thermal decomposition rate and pyrolysis temperature of ammonium perchlorate are related to the combustion performance of the solid propellant, especially the burning rate. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B29/22C06B23/00C06D5/06
CPCC06B29/22C06B45/10C06D5/06
Inventor 郭长平鲁月文田璐朱燕芳王茜王瑞浩王敦举
Owner SOUTHWEAT UNIV OF SCI & TECH
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