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Ionic liquid, polyionic liquid and preparation methods and application thereof

A polyionic liquid and ionic liquid technology, applied in the field of catalysis, can solve the problems of difficult separation of products and catalysts, low catalytic efficiency, low catalytic efficiency of heterogeneous catalysts, etc.

Active Publication Date: 2021-09-14
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently used decarboxylation catalysts generally have problems such as difficult separation of homogeneous catalysts and low catalytic efficiency of heterogeneous catalysts.
[0006] Therefore, the development of new, highly active, and easily separated decarboxylation catalysts to solve the problems of low catalytic efficiency and difficult separation of products and catalysts during the synthesis of epoxy compounds has become an urgent problem to be solved.

Method used

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  • Ionic liquid, polyionic liquid and preparation methods and application thereof
  • Ionic liquid, polyionic liquid and preparation methods and application thereof
  • Ionic liquid, polyionic liquid and preparation methods and application thereof

Examples

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Effect test

Embodiment 1

[0052] The present embodiment provides a kind of ionic liquid, its structure is as follows:

[0053]

[0054] The preparation method of described ionic liquid comprises:

[0055] Disperse 1,3-dibromo-2-propanol and N-vinylimidazole in acetonitrile at a molar ratio of 2.1:1, react for 24 hours at 70°C in the presence of nitrogen, remove the solvent by decantation, and use Washing with deionized water and absolute ethanol, and drying to obtain the ionic liquid.

Embodiment 2

[0057] This embodiment provides a polyionic liquid obtained by polymerizing the ionic liquid provided in Embodiment 1.

[0058] The preparation method of described polyionic liquid comprises the steps:

[0059] The ionic liquid monomer and azobisisobutyronitrile provided in Example 1 were dispersed in acetonitrile, stirred at room temperature for 30 minutes in the presence of nitrogen, and then polymerized at 65° C. for 24 hours. After solvent removal and washing, After drying, the polyionic liquid is obtained; the mass of the initiator is 3% of the mass of the ionic liquid.

Embodiment 3

[0061] The present embodiment provides a kind of ionic liquid, its structure is as follows:

[0062]

[0063] The preparation method of described ionic liquid comprises:

[0064] Disperse 1,4-dichloro-2,3-butanediol and N-vinylimidazole in acetonitrile at a molar ratio of 2.1:1, react for 20 hours at 72°C in the presence of nitrogen, and remove by decantation The solvent is washed with deionized water and absolute ethanol, and dried to obtain the ionic liquid.

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Abstract

The invention provides an ionic liquid, a polyionic liquid and preparation methods and application thereof. The structure of the ionic liquid is as shown in formula I, and the polyionic liquid is obtained by polymerizing the ionic liquid. The preparation method of the ionic liquid comprises the following steps: mixing N-vinyl imidazole, a compound X-R-X and an organic solvent, and conducting reacting to obtain the ionic liquid. The ionic liquid and the polyionic liquid have the advantages of high activity and easiness in separation when being used as catalysts, and can be applied to synthesis of epoxy compounds.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to an ionic liquid, a polyionic liquid and a preparation method and application thereof. Background technique [0002] As an important class of organic chemical raw materials, epoxy compounds are widely used in the fields of organic and polymerization synthesis. Typical epoxy compounds such as ethylene oxide, propylene oxide and butylene oxide are often used as raw materials for the production of fungicides, diluents and polyurethane precursors. In particular, butylene oxide is a chemical that can improve product performance in many ways and has a wide range of uses. At present, the main production processes of epoxy compounds include: chlorohydrin method, direct oxidation method and indirect oxidation method, etc., but these methods generally have disadvantages such as complex process, environmental pollution, and high production cost. Not only that, for epoxy compo...

Claims

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Application Information

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IPC IPC(8): C07D233/60C08F126/06B01J31/02B01J31/06C07D303/04C07D301/02
CPCC07D233/60C08F126/06B01J31/0285B01J31/0284B01J31/06C07D303/04C07D301/02
Inventor 王利国李杨李会泉曹妍贺鹏郑征
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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