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5-(2 nitro-methylene)-MTT and preparation method and application thereof

A technology of dinitromethylene and tetrazolium salts, applied in chemical instruments and methods, offensive equipment, catalysts for physical/chemical processes, etc. The effect of easy industrial production, reduced pressure index, and simple synthesis method

Inactive Publication Date: 2012-01-18
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used water-insoluble metal powders, oxides, organic acid salts and complexes, etc., but the addition of a considerable amount of inert catalysts (accounting for about 5% of the total) reduces the total energy of the propellant formula and makes the flight range difficult. control

Method used

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  • 5-(2 nitro-methylene)-MTT and preparation method and application thereof
  • 5-(2 nitro-methylene)-MTT and preparation method and application thereof
  • 5-(2 nitro-methylene)-MTT and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put 0.02mol (3.26g) of 1-amino-1-hydrazino-2,2-dinitroethylene into 30mL of distilled water, add 0.02mol of glacial acetic acid, and slowly add 0.02mol of 10mL aqueous solution of potassium nitrate, after reacting for 24 hours, adjust the pH to 8.5 with KOH, add 0.02mol of lead acetate, a large amount of light yellow precipitate is formed immediately, after stirring for 30 minutes, filter with suction and wash with distilled water and acetone, and dry in vacuum at 80°C , that is, the target product Pb(DNMT). Yield 68%. C and N were determined as (%) by elemental analyzer (the theoretical value in brackets): C 6.24 (6.33), N 22.03 (22.16). The Pb element content determined by chemical analysis is (%) (the theoretical value in brackets): 53.79 (54.63).

[0021] figure 1 It is the DSC spectrum of Pb(DNMT) of the present invention, and the DSC results show that the complex has high thermal stability, the rapid decomposition peak temperature is 215.9°C, the total amount o...

Embodiment 2

[0023] Put 0.02mol (3.26g) of 1-amino-1-hydrazino-2,2-dinitroethylene into 40mL of distilled water, add 0.02mol of glacial acetic acid, and slowly add 0.022mol of 15mL aqueous solution of sodium nitrate, reacted for 20 hours, adjusted the pH to 8 with NaOH, added 0.018mol of copper acetate, a large amount of light green precipitates formed immediately, stirred and reacted for 20 minutes, filtered with suction and washed with distilled water and acetone, dried in vacuum at 80°C , that is, the target product Cu(DNMT). Yield 62%. C, H, and N were determined by an elemental analyzer (the theoretical values ​​in parentheses) C: 10.04 (10.19), N: 35.49 (35.67). The Cu element content determined by chemical analysis is (%) (the theoretical value in brackets): 26.21 (26.97).

[0024] figure 2 It is the DSC spectrum of Cu(DNMT) of the present invention, and the DSC results show that the complex has high thermal stability, begins to decompose at about 220°C, the peak temperature is ...

Embodiment 3

[0026] Two compounds of Pb (DNMT) and Cu (DNMT) synthesized by the method of Example 1 and Example 2 were added to the solid double-base propellant according to the mass ratio of 5:1 with an additional amount of 5%, and the propellant combustion was carried out. speed measurement, obtained image 3 The results shown show that the burning rate increases rapidly in the low-pressure zone, and the ideal "platform combustion" and "Mesa combustion" appear, and the pressure index decreases significantly in the high-pressure zone, which is better than the currently commonly used organic acid lead-copper composite catalyst.

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Abstract

The invention discloses an energy containing salt based on M (DNMT) and a preparation method thereof, wherein DNMT is 5-(2 nitro-methylene)-tetrazole and M is selected from divalent metals of Pb, Cu, Mn, Fe, Co, Ni or Zn. The preparation method of the energy containing salt comprises the steps of: using 1-amino-1-hydrazine 2,2-dinitroethylene, nitrite and glacial acetic acid as raw material to synthesize the 5-(2 nitro-methylene)-tetrazole; adjusting pH value to 7-10, and then reacting with the soluble metal salts of Pb, Cu, Mn, Fe, Co, Ni or Zn to obtain sediment; and washing and drying to obtain the target product . The invention has simple synthesis method and is easy for industrialized production, and the synthesized M (DNMT) is a novel type of high energy compound which can be used as an energy-containing catalyst for solid double-base propellant combustion.

Description

technical field [0001] The invention belongs to the technical field of energetic materials, and in particular relates to a novel energetic combustion catalyst for solid propellant-5-(dinitromethylene)-tetrazolium salt and its preparation method and application. Background technique [0002] Solid propellant is the energy source of solid rocket motor. The range, flight speed and accuracy of the rocket not only depend on the propellant charge, but also are closely related to the energy release rate and release efficiency of the propellant when it burns. The use of a small amount of combustion catalyst is an important method to increase the combustion speed, reduce the combustion pressure index, and realize the regulation and control of efficient and steady-state combustion of propellants. [0003] At present, both at home and abroad, the method of adding a certain amount of composite catalyst composed of lead, copper and carbon black is adopted. Commonly used water-insoluble ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D257/04C06D5/00B01J31/02
Inventor 徐抗震赵凤起仪建华马海霞高红旭徐司雨宋纪蓉
Owner NORTHWEST UNIV
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