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Method for extracting and recovering ammonium perchlorate from solid propellant by adopting swelling method

A technology of solid propellant and ammonium perchlorate, which is applied in the direction of ammonium perchlorate composition, perchloric acid, perchlorate, etc., can solve the problems of poor compatibility, harm to human body, low extraction rate, etc. Good capacity, little harm to human body, high extraction rate

Inactive Publication Date: 2021-01-08
XIAN AEROSPACE CHEM PROPULTION PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, dichloromethane pure solvent or trichloromethane pure solvent is mostly used as swelling agent to extract ammonium perchlorate in HTPB solid propellant, and the extraction rate of this method is relatively low, only 30% to 50%.
Or use water / ether or water / acetone as a swelling agent for extraction, but the swelling agent of water / ether or water / acetone has poor compatibility with the HTPB propellant system, and is easy to volatilize and cause harm to the human body

Method used

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  • Method for extracting and recovering ammonium perchlorate from solid propellant by adopting swelling method
  • Method for extracting and recovering ammonium perchlorate from solid propellant by adopting swelling method
  • Method for extracting and recovering ammonium perchlorate from solid propellant by adopting swelling method

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Embodiment 1

[0028] This embodiment is a method for extracting and recovering ammonium perchlorate by the swelling method of HTPB solid propellant. The specific process is:

[0029] Step 1, make a sample of HTPB solid propellant.

[0030] The HTPB solid propellant is cut into a HTPB solid propellant sample with a length of 10 mm, a width of 10 mm and a thickness of 1 mm with a copper cutting tool.

[0031] Step 2, weighing of HTPB solid propellant.

[0032] Weigh the weight m with an electronic balance 0 0.17g of the HTPB solid propellant sample, and put it into the reactor.

[0033] Step 3, preparing a swelling solvent.

[0034] Weigh 50 g of ethyl acetate and 50 g of water with an electronic balance, mix the two evenly, and prepare a 50% ethyl acetate aqueous solution as a swelling solvent.

[0035] Step 4, extracting ammonium perchlorate crystals

[0036] Obtain described ammonium perchlorate crystallization by the swelling reaction of HTPB solid propellant and ethyl acetate aqueo...

Embodiment 2

[0045] This embodiment is a method for extracting and recovering ammonium perchlorate by the swelling method of HTPB solid propellant. The specific process is:

[0046] Step 1, make a sample of HTPB solid propellant.

[0047] The HTPB solid propellant is cut into a HTPB solid propellant sample with a length of 10 mm, a width of 10 mm and a thickness of 3 mm with a copper cutting tool.

[0048] Step 2, weighing the HTPB solid propellant.

[0049] Weigh the weight m with an electronic balance 0 0.50g of the HTPB solid propellant sample, and put it into the reactor.

[0050] Step 3, preparing a swelling solvent.

[0051] Weigh 80 g of ethyl acetate and 20 g of water with an electronic balance, mix the two evenly, and prepare an aqueous solution of ethyl acetate with a mass fraction of 80% as a swelling solvent.

[0052] Step 4, extracting ammonium perchlorate crystals

[0053] Obtain described ammonium perchlorate crystallization by the swelling reaction of HTPB solid prope...

Embodiment 3

[0061]This embodiment is a method for extracting and recovering ammonium perchlorate by the swelling method of HTPB solid propellant. The specific process is:

[0062] Step 1, make a sample of HTPB solid propellant.

[0063] The HTPB solid propellant is cut into a HTPB solid propellant sample with a length of 10 mm, a width of 10 mm and a thickness of 5 mm with a copper cutting tool.

[0064] Step 2, weighing the HTPB solid propellant.

[0065] Weigh the weight m with an electronic balance 0 0.85g of the HTPB solid propellant sample, and put it into the reactor.

[0066] Step 3, preparing a swelling solvent.

[0067] Weigh 95 g of ethyl acetate and 5 g of water with an electronic balance, mix the two evenly, and prepare an aqueous solution of ethyl acetate with a mass fraction of 95% as a swelling solvent.

[0068] Step 4, extracting ammonium perchlorate crystals

[0069] Obtain described ammonium perchlorate crystallization by the swelling reaction of HTPB solid propell...

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Abstract

The invention relates to a method for extracting and recovering ammonium perchlorate from a solid propellant by adopting a swelling method. The method comprises the following steps: by taking an ethylacetate aqueous solution as a swelling solvent, forming a mixture with an HTPB solid propellant through a swelling reaction; and filtering the mixture, and heating the filtrate until the filtrate isdried to obtain the ammonium perchlorate crystal. According to the invention, the raw materials are wide in source, low in price, low in volatility, small in harm to human bodies and good in compatibility with HTPB propellants, and the extraction rate of ammonium perchlorate reaches 93%-98%.

Description

technical field [0001] The invention relates to the field of recovery and utilization of solid propellants, in particular to a method for extracting and recovering ammonium perchlorate from HTPB solid propellants by a swelling method. Background technique [0002] HTPB propellant is a composite solid propellant widely used in solid missiles. Due to the replacement of missile weapons, long-term storage aging and failure, and some substandard products produced in the production process of enterprises, the scrapped HTPB propellants produced by countries all over the world reach more than 1,000 tons every year. [0003] In addition, in solid propellant production enterprises, a large amount of waste HTPB propellant is produced every year in the production process. Except for a small part of these waste HTPB propellants used in the research and development and production of military-civilian integration products, which generate certain economic and social benefits, most of them ...

Claims

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Application Information

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IPC IPC(8): C06B29/22C01B11/18
CPCC01B11/185C06B29/22
Inventor 张海珠王卫东沈玉倩
Owner XIAN AEROSPACE CHEM PROPULTION PLANT
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