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For atmospheric catalytic conversion of co 2 The polyionic liquid catalyst and preparation method thereof

A technology of polyionic liquid and ionic liquid, which is applied in the field of catalysts for CO2 catalytic conversion, can solve the problems of inconvenient recycling, high cost, high viscosity, etc., and achieve the effect of less dosage, easy separation, and reduced dosage

Active Publication Date: 2021-03-30
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, homogeneous ionic liquids have disadvantages such as high cost and high viscosity, which are not convenient for repeated recycling.

Method used

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  • For atmospheric catalytic conversion of co <sub>2</sub> The polyionic liquid catalyst and preparation method thereof
  • For atmospheric catalytic conversion of co <sub>2</sub> The polyionic liquid catalyst and preparation method thereof
  • For atmospheric catalytic conversion of co <sub>2</sub> The polyionic liquid catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 11.29g (100mmol) of 1-vinylimidazole and 20.4g (100mmol) of 2-bromoethylamine hydrobromide, add 50ml of anhydrous acetonitrile, heat and stir at 75°C for 24h at reflux under nitrogen protection. After the reaction, the solid product was filtered out, washed with absolute ethanol, and dried under vacuum at room temperature for 12 hours to obtain 1-vinyl-3-ethylaminoimidazolium bromide·hydrobromic acid ([AVIM]Br·HBr). Dissolve [AVIM]Br HBr in a small amount of water, add equimolar NaOH to carry out neutralization reaction to remove hydrobromic acid, dry the product and remove water, dissolve it in a small amount of anhydrous methanol, and centrifugally filter to remove sodium bromide insoluble matter, 40 °C and vacuum-dried to prepare 14.2 g of amino ionic liquid 1-vinyl-3-ethylaminoimidazolium bromide ([AVIM]Br).

[0028] Weigh 2.29g (15mmol) of 4-chloromethylstyrene and 2.372g (23mmol) of triethylamine in 3ml of anhydrous methanol, under nitrogen protection, and h...

Embodiment 2

[0032] Weigh 1.09g (5mmol) of [AVIM]Br and dissolve it in 50ml of dimethyl sulfoxide, add 1.27g (5mmol) of VBA, 0.65g (5mmol) of DVB and 0.24g of AIBN, heat and stir at 70°C under the protection of nitrogen for reflux reaction 24h. Cool to room temperature after the reaction, add acetone to precipitate the product, centrifuge, and vacuum dry at 110° C. for 48 hours to prepare a polyionic liquid catalyst, labeled as PADV-2.

Embodiment 3

[0034] Weigh 0.436g (2mmol) of [AVIM]Br and dissolve it in 50ml of dimethyl sulfoxide, add 3.80g (15mmol) of VBA, 2.60g (20mmol) of DVB and 0.24g of AIBN, heat and stir at 70°C under the protection of nitrogen for reflux reaction 24h. Cool to room temperature after the reaction, add acetone to precipitate the product, centrifuge, and vacuum dry at 110° C. for 48 hours to prepare a polyionic liquid catalyst, labeled as PADV-3.

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Abstract

The invention discloses a polyionic liquid catalyst, an amino ionic liquid 1-vinyl-3-ethylamino imidazole bromate and a quaternary ammonium ionic liquid vinyl benzyl triethyl ammonium chloride are taken as the active components, divinyl benzene is taken as a skeleton, free radical polymerization is used to prepare and obtain a polyionic liquid material, the excellent synergistic effect between theamino ionic liquid and the quaternary ammonium ionic liquid is used, the catalytic conversion of CO2 is efficiently conducted without solvents or additional cocatalysts at the normal pressure to prepare cyclic carbonate, the stability of the catalyst is good, and the catalyst can be recycled.

Description

technical field [0001] The present invention relates to a CO 2 Catalyst for catalytic conversion, in particular, a polyionic liquid heterogeneous catalyst that is fused with a catalyst and a cocatalyst, a preparation method of the catalyst, and a method for catalytic conversion of CO 2 Applications for the preparation of cyclic carbonates. Background technique [0002] With the rapid development of the global economy, climate warming has become a high-profile environmental issue, and CO 2 The large amount of greenhouse gas emissions, which are the main ones, has led to increasing climate warming in recent years. From a resource point of view, CO 2 It is a cheap, non-toxic and abundant C1 resource, which can be converted into a variety of high value-added organic chemicals, such as methanol, formic acid, cyclic carbonate, dimethyl carbonate and urea derivatives. Among them, CO 2 Cyclic carbonates are prepared by cycloaddition reaction with epoxy compounds. Because the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02B01J31/06C07D317/36
CPCB01J31/0279B01J31/0284B01J31/06C07D317/36Y02P20/584
Inventor 史利娟易群秦志峰刘婷婷张奇日李杰刘书磊
Owner TAIYUAN UNIV OF TECH
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