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Method for accurately and quantitatively analyzing combustion residue of boron-based fuel-rich propellant

A technology for quantitative analysis of combustion residues, applied in chemical analysis by titration method, analysis by making materials undergo chemical reactions, and material analysis by observing the impact on chemical indicators, etc., can solve the problem of low boric acid residue Problems such as result errors and small titration results can achieve the effect of comprehensive analysis, small errors and high reliability.

Inactive Publication Date: 2012-07-04
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

Therefore, the chemical analysis method is mainly used in the quantitative analysis. At present, the domestic quantitative analysis of boron-containing fuel-rich propellant residues mainly focuses on the components of the residue (mainly B, B 2 o 3 ) analysis, the accuracy is low, and there are the following deficiencies: (1) in B 2 o 3 In the quantitative analysis, because the boron-containing fuel-rich propellant added part of the magnesium-aluminum metal, the reaction between the magnesium-aluminum metal oxide generated in the combustion residue and the boric acid generated in the residue solution was not considered, and part of the boric acid was consumed, resulting in The residual amount of boric acid is very small, and the titration result is obviously small, so in the process of constant analysis, there will be a large error in the analysis result

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  • Method for accurately and quantitatively analyzing combustion residue of boron-based fuel-rich propellant
  • Method for accurately and quantitatively analyzing combustion residue of boron-based fuel-rich propellant

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[0029] 1. Weigh 0.5008g of the residue and place it in a 250ml ground-mouth bottle, add 50ml of distilled water, and carry out ultrasonic dispersion at 50°C for 30min to obtain a solution. Add 10ml of 2mol / L dilute hydrochloric acid (density of 1.03g / cm 3), then adjust the solution after adding dilute hydrochloric acid to pH=5 with 1mol / L standard sodium hydroxide solution, adopt medium-speed filter paper to filter, add 7.5g mannitol to promote the dissociation of boric acid in the filtered filtrate, use 1mol / L standard sodium hydroxide solution and titrate the solution obtained after adding mannitol to pH=7.

[0030] 2. Add 50ml of distilled water to the filter residue filtered by medium-speed filter paper in the first step, and then add 50ml of 10% H 2 o 2 and 1.5gK 2 S 2 o 8 Boil and reflux for 30 minutes. After the boiled and refluxed solution is cooled to room temperature, add 7.5 g of mannitol to promote the dissociation of boric acid, and then use standard sodium h...

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Abstract

The invention discloses a method for accurately and quantitatively analyzing combustion residue of a boron-based fuel-rich propellant. The method comprises the following steps of: successively detecting the contents of B2O3, B, Al2O3, MgO, C and BN, adding less dilute hydrochloric acid and redetermining the PH of a titration end-point according to ionization equilibrium of boric acid, so that the errors of the B2O3 and B titration results are greatly reduced, and the quantitative analysis is more reliable. Each constituent in the residue of the boron-based fuel-rich propellant is accurately and quantitatively analyzed through adopting chemical analysis and instrumental analysis; and the reliability of the analytical result is high, the error is small, the analysis is comprehensive, and the experiment operation is easy to realize.

Description

technical field [0001] The invention relates to a method for accurately quantitatively analyzing each component in boron-containing fuel-rich propellant residue. Background technique [0002] Boron-containing fuel-rich propellants are mainly used in solid rocket ramjet engines. The oxidizer required for combustion is mainly obtained from oxygen in the air. Compared with solid rocket motors, it has a high specific impulse and is a solid rocket The most ideal energy source for ramjet engines. Combustion products of boron-rich fuel-rich propellants are divided into gas-phase combustion products and condensed-phase combustion products. Combustion residue refers to the condensed phase product after propellant combustion. The composition and content of the residue are determined by the combustion process. Therefore, the determination of the composition and content of the residue can infer the competitive oxidation and combustion chemical reactions between fuels, and thus infer th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16G01N21/79G01N5/04
Inventor 胡松启王鹏飞刘凯陈静
Owner NORTHWESTERN POLYTECHNICAL UNIV
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