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Preparation method for styrene-coated ammonium perchlorate

A technology of ammonium perchlorate and styrene, applied in ammonium perchlorate composition, explosives, etc., can solve the problems of high surface activity, complex preparation method, high mechanical sensitivity, etc., achieve good dispersibility and regularity, and preparation method Safe and reliable, low production cost effect

Inactive Publication Date: 2014-11-05
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ammonium perchlorate has the characteristics of large specific surface area, high surface energy, and high surface activity. It is easy to agglomerate or adsorb with other substances during preparation, storage, and transportation to reduce the surface energy. Application of ammonium chlorate in fields with high safety requirements
[0003] The Chinese patent with the patent publication number CN201010198073.8 discloses a method for preparing nano-catalytic composite materials using the integrated process of ultrasonic-membrane-anti-solvent method. The anti-solvent method is used to precipitate ammonium perchlorate from its saturated solution and evenly disperse it in the Nano-catalyst composite materials are formed on nano-catalyst particles, but there are disadvantages such as complicated preparation methods, high equipment requirements, and high energy consumption.
But its yield is low, easy to agglomerate, moisture absorption

Method used

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  • Preparation method for styrene-coated ammonium perchlorate
  • Preparation method for styrene-coated ammonium perchlorate
  • Preparation method for styrene-coated ammonium perchlorate

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Taking used raw material ammonium perchlorate 1g as example, the preparation method of its styrene coating ammonium perchlorate is made up of following steps:

[0035] 1. Preparation of styrene monomer

[0036] Styrene was extracted with 7.5% sodium hydroxide aqueous solution, the volume ratio of styrene to 7.5% sodium hydroxide aqueous solution was 1:1, and it was left to stand for 12 hours with anhydrous magnesium sulfate to dry and remove water. Distilled under reduced pressure at 0.09GPa to obtain styrene monomer.

[0037] 2. Ultrasonic dispersion

[0038] Get 1g ammonium perchlorate and join in the flask, add sherwood oil anti-solvent 32.5g, add styrene monomer 0.9g again, the mass ratio of ammonium perchlorate and styrene monomer, sherwood oil anti-solvent is 1:0.9: 32.5, ultrasonically disperse with an ultrasonic cleaner with a power of 300W.

[0039] 3. Styrene coated ammonium perchlorate

[0040] The ultrasonically dispersed solution was stirred and reacted...

Embodiment 2

[0044] Taking used raw material ammonium perchlorate 1g as example, the preparation method of its styrene coating ammonium perchlorate is made up of following steps:

[0045] In step 1 of preparing styrene monomer, styrene is extracted with an aqueous sodium hydroxide solution with a mass concentration of 5%, and the volume ratio of styrene to an aqueous sodium hydroxide solution with a mass concentration of 5% is 1:1. Magnesium sulfate was left to stand for 12 hours to dry and remove water, and 0.09GPa was distilled under reduced pressure to obtain styrene monomer. In ultrasonic dispersion step 2, get 1g ammonium perchlorate and join in the flask, add sherwood oil anti-solvent 32.5g, add styrene monomer 0.6g again, the mixture of ammonium perchlorate and styrene monomer, sherwood oil anti-solvent The mass ratio is 1:0.6:32.5, and ultrasonically disperses with an ultrasonic cleaner with a power of 300W. In step 3 of coating ammonium perchlorate with styrene, the ultrasonicall...

Embodiment 3

[0047] Taking used raw material ammonium perchlorate 1g as example, the preparation method of its styrene coating ammonium perchlorate is made up of following steps:

[0048] In step 1 of preparing styrene monomer, styrene is extracted with an aqueous solution of sodium hydroxide with a mass concentration of 10%, and the volume ratio of styrene to an aqueous solution of sodium hydroxide with a mass concentration of 10% is 1:1. Magnesium sulfate was left to stand for 12 hours to dry and remove water, and 0.09GPa was distilled under reduced pressure to obtain styrene monomer. In ultrasonic dispersion step 2, get 1g ammonium perchlorate and join in the flask, add sherwood oil anti-solvent 32.5g, add styrene monomer 1.2g again, the mixture of ammonium perchlorate and styrene monomer, sherwood oil anti-solvent The mass ratio is 1:1.2:32.5, and ultrasonically disperses with an ultrasonic cleaner with a power of 300W. In step 3 of coating ammonium perchlorate with styrene, the ultra...

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Abstract

The invention discloses a preparation method for styrene-coated ammonium perchlorate. The preparation method comprises the following steps of: preparing a styrene monomer; ultrasonically dispersing; coating ammonium perchlorate with the styrene; and preparing styrene-coated ammonium perchlorate. According to the preparation method disclosed by the invention, the surface of the ammonium perchlorate is coated by adopting styrene; the coating film is very thin, and the mass of the coating film is smaller than that of the ammonium perchlorate; the influence to the energy characteristic of the propellant is very small; the dispersion and regularity are good; the grain size range is 10 microns to 30 microns; the film coating thickness is controllable; and petroleum ether is adopted as an anti-solvent, so that the styrene-coated ammonium perchlorate material can be prepared within a short time. The preparation method disclosed by the invention has the advantages of being safe and reliable, convenient to operate and low in production cost. The ammonium perchlorate has spherical appearance, good dispersion and uniform grain size after being coated, and so the preparation method can be used for coating the ammonium perchlorate.

Description

technical field [0001] The invention belongs to the technical field of solid propellant materials, in particular to the surface treatment of ammonium perchlorate. Background technique [0002] The main oxidant commonly used in composite solid propellants and mixed explosives is ammonium perchlorate, and the combustion performance of composite solid propellants and mixed explosives is mainly determined by the combustion performance of ammonium perchlorate. Ammonium perchlorate has the characteristics of large specific surface area, high surface energy, and high surface activity. During preparation, storage, and transportation, it is easy to agglomerate or adsorb with other substances to reduce the surface energy. Ammonium chlorate is used in fields with high safety requirements. [0003] The Chinese patent with the patent publication number CN201010198073.8 discloses a method for preparing nano-catalytic composite materials using the integrated process of ultrasonic-membrane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B45/32C06B29/22
Inventor 高子伟崔丹张伟强张国防李子美朱序阳南宝江张文刚
Owner SHAANXI NORMAL UNIV
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