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Preparation method and application of 1-amino-1-hydrazino-2,2-dinitroethylene bismuth salt

A technology of dinitroethylene bismuth salt and dinitroethylene, which is applied in the preparation of hydrazine, offensive equipment, and the generation of compressed gas, can solve the problems of energy-free, low catalytic efficiency, and lower propellant energy level, and achieve The effect of reducing the burning rate pressure index, easy industrial production, and simple synthesis method

Inactive Publication Date: 2011-08-24
SHAANXI NORMAL UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

The organic bismuth salt combustion catalysts used in double-base propellants currently studied have problems such as low catalytic efficiency and energy-free, and adding them to the propellant system cannot effectively reduce the burning rate pressure index of double-base propellants. also reduces the energy level of the propellant to some extent
Song Xiuduo et al published in "The Thermal Decomposition Mechanism, Non-isothermal Kinetics of Bismuth Citrate and Its Catalytic Effect on the Combustion of Double-base Propellants" published in "Chemical Journal of Chinese Universities" Vol. Effect", the reported non-energetic bismuth citrate as a combustion catalyst can only reduce the burning rate pressure index of the double-base propellant (compared with the blank formula) between 2MPa and 22MPa from 0.75 to 0.42, which cannot meet the low The demand for the development of dual base propellants with burning rate pressure index has affected its practical value

Method used

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  • Preparation method and application of 1-amino-1-hydrazino-2,2-dinitroethylene bismuth salt
  • Preparation method and application of 1-amino-1-hydrazino-2,2-dinitroethylene bismuth salt
  • Preparation method and application of 1-amino-1-hydrazino-2,2-dinitroethylene bismuth salt

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Experimental program
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Effect test

Embodiment 1

[0021] 1. Preparation of potassium 1-amino-1-hydrazino-2,2-dinitroethylene

[0022] Take 4.4400 g of 1,1-diamino-2,2-dinitroethylene and disperse it in a flask filled with 30 mL of deionized water, and drop 2 mL of hydrazine hydrate into the flask at a rate of 1-2 drops / second, 1, The molar ratio of 1-diamino-2,2-dinitroethylene to hydrazine hydrate and deionized water is 1:1.6:167, placed in a constant temperature oil bath at 85°C, stirred until the solution is clear, and continued to stir for 1 hour, Cool to room temperature, adjust the pH value to 3-4 with a 10% aqueous solution of hydrochloric acid, add 3.3600 g of KOH, and the molar ratio of 1,1-diamino-2,2-dinitroethylene to KOH is 1:2 , continue to stir at room temperature for 1 hour, concentrate at 60°C until a solid precipitates, cool in an ice bath, and filter with suction to obtain an orange-red solid, and prepare 1-amino-1-hydrazino-2,2-dinitroethylene potassium 3.2803g, the yield is 80%.

[0023] 2. Preparation ...

Embodiment 2

[0028] 1. Preparation of potassium 1-amino-1-hydrazino-2,2-dinitroethylene

[0029] Take 4.4400 g of 1,1-diamino-2,2-dinitroethylene and disperse it in a beaker filled with 30 mL of deionized water, add 2 mL of hydrazine hydrate dropwise into the beaker at a rate of 1-2 drops / second, 1, The molar ratio of 1-diamino-2,2-dinitroethylene to hydrazine hydrate and deionized water is 1:1.6:167, placed in a constant temperature oil bath at 85°C, stirred until the solution is clear, and continued to stir for 1 hour, Cool to room temperature, adjust the pH value to 3-4 with a 10% aqueous solution of hydrochloric acid, add 1.68 g of KOH, and the molar ratio of 1,1-diamino-2,2-dinitroethylene to KOH is 1:1 , continue to stir at room temperature for 1 hour, concentrate at 60°C until a solid precipitates, cool in an ice bath, and filter with suction to obtain an orange-red solid, and prepare 1-amino-1-hydrazino-2,2-dinitroethylene potassium 2.4890 g, the yield is 60.7%.

[0030] 2. Prepa...

Embodiment 3

[0033] 1. Preparation of potassium 1-amino-1-hydrazino-2,2-dinitroethylene

[0034] Take 4.4400 g of 1,1-diamino-2,2-dinitroethylene and disperse it in a beaker filled with 30 mL of deionized water, add 2 mL of hydrazine hydrate dropwise at a rate of 1-2 drops / second, 1,1-dinitroethylene The molar ratio of amino-2,2-dinitroethylene to hydrazine hydrate and deionized water is 1:1.6:167, placed in a constant temperature oil bath at 85°C, stirred until the solution is clear, continued to stir for 1 hour, and cooled to room temperature , with a mass fraction of 10% aqueous hydrochloric acid to adjust the pH to 3-4, add 5.04 g of KOH, the molar ratio of 1,1-diamino-2,2-dinitroethylene to KOH is 1:3, and continue at room temperature Stir for 1 hour, concentrate at 60°C until a solid precipitates, cool in an ice bath, and filter with suction to obtain an orange-red solid, and prepare 3.2586 g of 1-amino-1-hydrazino-2,2-dinitroethylene potassium. Its yield was 79.5%.

[0035] 2. Pre...

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Abstract

The invention relates to a preparation method of 1-amino-1-hydrazino-2,2-dinitroethylene bismuth salt. The method comprises the following steps: synthetizing 1-amino-1-hydrazino-2,2-dinitroethylene potassium salt by using 1,1-diamino-2,2-dinitroethylene, hydrazine hydrate and KOH as raw materials, then reacting with soluble metal salts such as bismuth nitrate to prepare 1-amino-1-hydrazino-2,2-dinitroethylene bismuth salt. The synthesis method is simple; the industrialized production is easy to operate; and the synthesized 1-amino-1-hydrazino-2,2-dinitroethylene bismuth salt is a new high-energy compound, is used as green and energetic combustion catalyst and can be used to greatly reduce the burning rate pressure exponents of the double-base propellant and the modified double-base propellant.

Description

technical field [0001] The invention belongs to the technical field of energetic materials, and relates to a preparation method and application of a novel energetic fuel catalyst 1-amino-1-hydrazino-2,2-dinitroethylene bismuth salt for double-base solid propellants. Background technique [0002] Solid propellants are the power source of solid rocket motors, and their combustion performance and energy performance are closely related to missile range, reaction speed, and strike accuracy. [0003] At present, the combustion catalysts commonly used in double-base solid propellants (double-base propellants and modified double-base propellants) are mostly lead, copper oxides and their organic salts, inorganic salts, etc., and their main function is to adjust the propellant The combustion performance of the propellant is reduced, and the pressure index of the burning rate of the propellant is reduced to ensure the working stability of the propellant. However, lead oxides and their...

Claims

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Application Information

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IPC IPC(8): C07C243/16C07C241/02C06D5/00
Inventor 张国防高玲李吉祯赵凤起樊学忠
Owner SHAANXI NORMAL UNIV
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