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Ignition accelerant for hydrogen peroxide-spontaneous combustion ionic liquid as well as preparation method and application of ignition accelerant

An ignition accelerator, ionic liquid technology, applied in offensive equipment, compressed gas generation, organic chemistry, etc., can solve problems such as difficult spontaneous ignition, and achieve the effect of improving combustion performance and good compatibility

Active Publication Date: 2022-04-05
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that existing pyrophoric ionic liquids and rocket-grade hydrogen peroxide are difficult to spontaneously ignite, the object of the present invention is to provide a kind of accelerant suitable for the self-ignition of hydrogen peroxide-pyrophoric ionic liquids

Method used

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  • Ignition accelerant for hydrogen peroxide-spontaneous combustion ionic liquid as well as preparation method and application of ignition accelerant
  • Ignition accelerant for hydrogen peroxide-spontaneous combustion ionic liquid as well as preparation method and application of ignition accelerant
  • Ignition accelerant for hydrogen peroxide-spontaneous combustion ionic liquid as well as preparation method and application of ignition accelerant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of 1-methyl-4,5-diiodoimidazolium iodide salt:

[0033] ;

[0034] At room temperature, add (5.02g, 15.6mmol) 4,5-diiodoimidazole, (4.751g, 34.4mmol) potassium carbonate and 70ml acetonitrile into a 250ml round bottom flask, then react at a constant temperature at 30°C for 4h, and then (4.436 g, 31.2 mmol) methyl iodide was added dropwise within 10 minutes under atmosphere, and the reaction mixture was kept at 30° C. for 72 hours after the addition was complete. After the reaction, the solvent acetonitrile was filtered off with a sand core funnel to obtain the crude product 1-methyl-4,5-diiodoimidazole iodide salt. The crude product was washed with ethyl acetate and cold water, and then vacuum-dried to obtain the product 1-methyl-4,5-diiodoimidazolium iodide salt (4.306 g, yield 82.65%) as a white solid.

Embodiment 2

[0036] Preparation of accelerator 1,3-dimethyl-4,5-diiodoimidazole iodine salt:

[0037] ;

[0038] Add (4g, 11.98mmol) 1-methyl-4,5-diiodoimidazolium iodide salt and 50ml N,N-dimethylformamide to a 100ml round-bottomed flask at room temperature, and then under nitrogen atmosphere for 10 minutes (3.401 g, 23.96 mmol) methyl iodide was added dropwise, and after the addition was complete, the reaction mixture was heated to 50° C. for 24 hours. After the reaction, the solvent N,N-dimethylformamide was filtered off with a sand core funnel to obtain the crude product 1,3-dimethyl-4,5-diiodoimidazolium iodide salt. The crude product was washed with ethanol and diethyl ether, and then vacuum-dried to obtain the product 1,3-dimethyl-4,5-diiodoimidazolium iodide salt (3.785 g, yield 66.40%) as a white solid.

[0039] The test data of accelerator 1,3-dimethyl-4,5-diiodoimidazolium iodide salt is as follows: IR: ν=3134, 3110, 3086, 3045, 2939, 1652, 1553, 1438, 1235, 1192, 1101, 108...

Embodiment 3

[0041] Preparation of accelerator 1,3-dimethyl-4,5-diiodoimidazole triiodide:

[0042] ;

[0043] At room temperature, add (0.267g, 1.05mmol) iodine simple substance and 80ml acetone to a 100ml round bottom flask, then add (0.5g, 1.05mmol) 1,3-dimethyl-4,5-diiodoimidazole iodine salt, after the addition was complete the reaction mixture was warmed to 25°C for 10 hours. After the reaction, the solvent acetone in the system was removed by rotary evaporation, and then vacuum-dried to obtain 1,3-dimethyl-4,5-diiodoimidazole triiodide salt.

[0044] The test data of accelerator 1,3-dimethyl-4,5-diiodoimidazole triiodide salt is as follows: 1H NMR (DMSO-d6): δ 9.42 (1H, s, CH), 3.82 (6H, s, CH3 ). 13C NMR (DMSO-d6): δ38.82, 94.03,140.75. ESI: m / z calcd for anion [M]−: 380.70; found: 380.70; calcd forcation [M]+: 348.89; found: 348.91. Elemental analysis of C5H7I5N2 (729.626). Calcd: C, 8.23; H, 0.967; N, 3.84. Found: C, 8.95; H, 0.95; N, 4.01.

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Abstract

The invention discloses an ignition accelerant for hydrogen peroxide-spontaneous combustion ionic liquid and a preparation method and application thereof.The preparation method comprises the following steps that 1, 4, 5-diiodoimidazole, potassium carbonate and methyl iodide are added into a reaction bottle, a solvent acetonitrile is added for a reflux reaction, two phases are divided after the reaction is completed, filtering and washing are conducted, and then vacuum drying is conducted; (2) adding the dried solid powder and iodomethane into a reaction flask, adding a solvent N, N-dimethylformamide, reacting to obtain a precipitate, washing, filtering, and drying to obtain 1, 3-dimethyl-4, 5-diiodoimidazole iodized salt; and (3) adding an iodine elementary substance and an acetone solvent into the reaction flask, then adding the 1, 3-dimethyl-4, 5-diiodoimidazole iodised salt, carrying out rotary evaporation after reaction to remove acetone, and drying to obtain the 1, 3-dimethyl-4, 5-diiodoimidazole triiodised salt. According to the ignition accelerant, the combustion performance of fuel in a hydrogen peroxide-spontaneous combustion ionic liquid two-component fuel propellant system can be remarkably improved.

Description

[0001] The invention relates to the technical field of catalysts, in particular to an ignition accelerator for hydrogen peroxide-pyrophoric ionic liquids, a preparation method and an application. Background technique [0002] Propellants are an important class of functional materials in materials science. In space propulsion systems, a propellant is used to generate a gas that is passed directly through a nozzle to generate thrust. Propellants are a key issue in space today and have become a hot topic for continuous improvement and development by researchers. [0003] Rocket propellants can be classified into single-component, dual-component and multi-component propellants according to their composition. In propellant systems, the most common bicomponent propellants consist of a fuel (or reducing agent) and an oxidizer. Currently, the choice of propellant fuel mainly relies on hydrazine and its methylated derivatives, hydrazine and hydrazine derivatives (such as unsymmetrica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/68C06B23/00C06D5/08
CPCY02P20/54
Inventor 刘龙李越张延强贾永高白金虎姚远焦念明
Owner ZHENGZHOU UNIV
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