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Spontaneous combustion ionic liquid containing tension ring structure and application

An ionic liquid and tension technology, used in organic chemistry, explosives, etc., can solve the problems of human and environmental hazards, low density specific impulse of non-hydrazine materials, and high toxicity.

Active Publication Date: 2021-03-19
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current propellants mainly have the following problems: (1) The specific impulse of non-hydrazine materials is relatively low, and the combustion conditions are harsh
(2) Hydrazine materials are volatile, highly toxic, highly carcinogenic, and cause serious harm to humans and the environment
[0004] At present, the cations of pyrophoric ionic liquids containing imidazole structures are generally designed by introducing linear alkanes, linear alkenes or linear alkynes on imidazoles, and then adding anions to form a pyrophoric ionic liquid, but this type of ionic liquid exists low energy problem

Method used

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  • Spontaneous combustion ionic liquid containing tension ring structure and application
  • Spontaneous combustion ionic liquid containing tension ring structure and application
  • Spontaneous combustion ionic liquid containing tension ring structure and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of ionic liquid, the steps are as follows:

[0029] 1-Methylcyclopropyl-3-methylimidazolium dicyanoammonium salt:

[0030] In the first step, imidazole (6.808g, 0.100mol) and sodium hydroxide (8.000g, 0.200mol) were added to a 500ml round-bottomed flask, and the reaction was vigorously stirred at 90 °C for 5 hours, and then dried in a vacuum oven.

[0031] In the second step, methylcyclopropyl bromide (9.450 g, 0.070 mol) was added to the dried product, and 200 ml of THF was added, and the reaction was vigorously stirred at 40 °C for 40 hours. After the reaction is completed, filter, and wash the solid with 10% of the original volume of THF, combine the filtrates, and finally evaporate the solvent, add 100 ml of deionized water and 100 ml of dichloromethane for extraction, and obtain an organic phase. Dichloromethane is evaporated to obtain a methyl ring propylimidazole.

[0032] In the third step, methylcyclopropylimidazole (12.200g, 0.100mol) and met...

Embodiment 2

[0035] The preparation of ionic liquid, the steps are as follows:

[0036] 1-Methylcyclobutyl-3-propylimidazolium dicyanoammonium salt:

[0037] In the first step, imidazole (6.808 g, 0.100 mol) and sodium hydroxide (4.800 g, 0.120 mol) were added to a 500 ml round-bottomed flask, and the reaction was vigorously stirred at 110 °C for 3 hours, and then dried.

[0038] In the second step, methylcyclobutyl bromide (16.390 g, 0.110 mol) was added to the dried product, and 100 ml of THF was added, and the reaction was vigorously stirred at 50 °C for 20 hours. After the reaction is completed, filter, and wash the solid with 10% of the original volume of THF, finally evaporate the solvent, add 50 ml of deionized water and 50 ml of dichloromethane for extraction, obtain an organic phase, and steam out the dichloromethane to obtain methylcyclopropylimidazole .

[0039] In the third step, methylcyclobutylimidazole (13.600g, 0.100mol) and iodopropane (18.699g, 0.110mol) were added to a 1...

Embodiment 3

[0042] The preparation of ionic liquid, the steps are as follows:

[0043] 1-Cyclobutyl-3-pentylimidazolium dicyanoammonium salt:

[0044] In the first step, imidazole (6.808 g, 0.100 mol) and sodium hydroxide (4.000 g, 0.100 mol) were added to a 500 ml round-bottomed flask, and the reaction was vigorously stirred at 120 °C for 2 hours, and then dried.

[0045] In the second step, cyclobutyl bromide (20.250 g, 0.150 mol) was added to the dried product, and 80 ml of acetonitrile was added, and the reaction was vigorously stirred at 80 °C for 10 hours. After the reaction is completed, filter, and wash the solid with 10% of the original volume of acetonitrile, finally evaporate the solvent, add 50 ml of deionized water and 50 ml of dichloromethane for extraction, obtain an organic phase, and steam out the dichloromethane to obtain methylcyclopropylimidazole .

[0046] The third step is to take cyclobutylimidazole (12.200g, 0.100mol) and iodopentane (29.708g, 0.150mol) into a 10...

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Abstract

The invention provides a spontaneous combustion ionic liquid containing a tension ring structure and application, and the preparation steps are as follows: (1) adding imidazole and sodium hydroxide into a reaction bottle, and drying after the reaction is finished; (2) proportionally adding the dried product in the step (1) and halide R1X into a reaction flask for reaction, filtering after the reaction is completed to obtain filtrate, washing, extracting to obtain an organic phase, and evaporating dichloromethane to obtain an imidazole precursor; (3) proportionally adding the imidazole precursor obtained in the step (2) and a halide R2X into a reaction bottle, reacting to obtain a precipitate, washing to evaporate the solvent, and drying to obtain an ionic liquid; and (4) adding the ionic liquid obtained in the step (3) and sodium salt or silver salt D corresponding to anions into a reaction bottle, adding a solvent C, filtering after reaction, evaporating out the solvent, and drying toobtain the ionic liquid. The spontaneous combustion ionic liquid obtained in the invention has very high enthalpy of formation (basically greater than 200KJ mol <-1>) and very high energy value.

Description

technical field [0001] The invention relates to the field of natural ionic liquids, in particular to a self-igniting ionic liquid containing a tension ring structure and its application. Background technique [0002] With the development of aerospace technology, as the power source of rocket engine, the research of liquid rocket propellant has received more and more attention. The current liquid propellants are mainly composed of high-energy fuels such as hydrazine, kerosene and liquid hydrogen, and oxidants such as nitrous oxide and liquid oxygen. However, the current propellants mainly have the following problems: (1) The density of non-hydrazine materials is relatively low, and the combustion conditions are harsh. (2) Hydrazine materials are volatile, highly toxic, and highly carcinogenic, causing serious harm to humans and the environment. [0003] Ionic liquids, also known as room-temperature ionic liquids, refer to a class of substances that are composed of cations a...

Claims

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Application Information

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IPC IPC(8): C07D233/58C06B45/00
CPCC07D233/58C06B45/00
Inventor 张延强袁艳艳焦念明夏洋峰刘龙
Owner ZHENGZHOU UNIV
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