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Polymer loaded with ion liquid, preparation and application thereof

A technology of ionic liquids and polymers, which is applied in the field of cyclic carbonates, can solve the problems of inconvenient recovery of ionic liquids and difficulties in the reuse of catalysts, and achieve the effects of firm loading, simple preparation process, and simple treatment

Inactive Publication Date: 2008-10-08
INST OF CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the post-treatment process of the reaction, the recovery of the ionic liquid is inconvenient, which brings difficulties to the reuse of the catalyst.

Method used

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  • Polymer loaded with ion liquid, preparation and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, preparation is loaded with the polymer of ionic liquid

[0015] 5.5 g of 1-vinylimidazole and 18.5 g of chlorobutane were stirred and refluxed at 70°C under a nitrogen atmosphere for 24 hours, cooled to room temperature, and the lower precipitate was washed with ethyl acetate to obtain 4.46 g of chlorovinylbutyl imidazole. Under the protection of nitrogen, 1.0 g of divinylbenzene, 0.5 g of chlorovinylbutylimidazole and 0.05 g of AIBN were dissolved in 250 ml of chloroform, stirred and refluxed at 70 ° C for 48 hours, and the obtained solid was filtered and washed with tetrahydrofuran and methanol respectively. Wash with acetone and dry under vacuum at 50° C. to obtain a polymer loaded with ionic liquid.

[0016] The polymer was ground into powder in a glass mortar, elemental analysis: N: 5.24; C: 74.69; H: 7.86; Cl: 7.82.

Embodiment 2

[0018] Under nitrogen protection, 3.2 grams of divinylbenzene, 0.5 grams of chlorovinylbutylimidazole obtained in Example 1 and 0.05 grams of AIBN were dissolved in 250 milliliters of chloroform, stirred and refluxed at 70 ° C for 48 hours, and the obtained solid was filtered. Wash with tetrahydrofuran, methanol and acetone respectively, and dry under vacuum at 50°C to obtain a polymer loaded with ionic liquid.

[0019] The polymer was ground into powder in a glass mortar, elemental analysis: N: 2.18; C: 82.73; H: 7.81; Cl: 3.55.

Embodiment 3

[0021] Under nitrogen protection, 3.0 grams of divinylbenzene, 0.15 grams of chlorovinylbutylimidazole obtained in Example 1 and 0.05 grams of AIBN were dissolved in 250 milliliters of chloroform, stirred and refluxed at 70 ° C for 48 hours, and the obtained solid was filtered. Wash with tetrahydrofuran, methanol and acetone respectively, and dry under vacuum at 50°C to obtain a polymer loaded with ionic liquid.

[0022] The polymer was ground into powder in a glass mortar, elemental analysis: N: 1.00; C: 88.36; H: 7.83; Cl: 1.46.

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Abstract

The invention discloses an ionic liquid-supported polymer, the preparation method and application of the polymer. The ionic liquid-supported polymer of the invention is the copolymer of vinyl imidazole salt and polymer cross-linker. According to the invention, firstly, N- vinyl imidazole is reacted with chlorobutane to produce imidazole salt; then the ionic liquid is fixed on a solid polymer through the free radical copolymerization between the imidazole salt of ethylene and divinylbenzene. The ionic liquid-supported polymer of the invention has good catalytic activity to the reaction that epoxides and carbondioxide are reacted to synthesize cyclic carbonate through cycloaddition, therefore, the ionic liquid-supported polymer is a solid catalyst with high activity and high selectivity. Compared with other catalysts, the ionic liquid-supported polymer has simple preparation process and the firm supporting; when the reaction is finished, the reaction solution can be easily treated, and the catalyst can be filtered and separated easily and can be reused.

Description

technical field [0001] The invention relates to a polymer loaded with ionic liquid and its preparation method and application, in particular to the application of the polymer to catalyze the cycloaddition reaction of alkylene oxide and carbon dioxide to generate cyclic carbonate. Background technique [0002] Cyclic carbonate is an excellent aprotic polar solvent. It is an intermediate product of synthetic polyurethane rubber, urea plastic and isocyanate, as well as a precursor of polycarbonate and other polymer materials. It is widely used in the chemical industry. Wide range of applications (A.-A.G. Shaikh, S. Sivaram, Chem. Rev. 1996, 96, 951). Carbonate is synthesized by cycloaddition reaction of alkylene oxide and carbon dioxide. Due to the use of greenhouse gas carbon dioxide, the process is simple and the yield is high, so it has been widely valued. The reaction formula of this reaction is as follows: [0003] [0004] There are many substances that can be used as...

Claims

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Application Information

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IPC IPC(8): C08F226/06C08F4/04C08K5/01C07D317/36C07D317/38
Inventor 谢晔韩布兴张兆富姜涛赫金玲吴天斌丁昆仑
Owner INST OF CHEM CHINESE ACAD OF SCI
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