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Supported imidazole ion liquid cross-linked polymer nano particles and preparation and application thereof

A technology of imidazole ionic liquid and cross-linked polymer, which is applied in the chemical field, can solve the problems of toxic co-solvent or co-catalyst, low catalyst stability, low catalytic activity and selectivity, and achieve simple preparation method, mild reaction conditions, The effect of broad application prospects

Inactive Publication Date: 2012-12-26
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the results achieved by these catalytic systems are remarkable, most of these catalytic systems suffer from the following disadvantages: low catalytic activity and selectivity, low catalyst stability, or the need for toxic co-solvents or co-catalysts, high temperature or high pressure

Method used

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  • Supported imidazole ion liquid cross-linked polymer nano particles and preparation and application thereof
  • Supported imidazole ion liquid cross-linked polymer nano particles and preparation and application thereof
  • Supported imidazole ion liquid cross-linked polymer nano particles and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1, preparation of loaded imidazole ionic liquid cross-linked polymer nanoparticles (CLPN)

[0044] (1) Synthesis of Biimidazolium Bromide Ionic Liquid ([DIMB]Br)

[0045]1-vinylimidazole (4.00g, 42.5mmol) and 1,4-dibromobutane (4.75g, 22mmol) were mixed in a 2:1 molar ratio, added to a 100ml round-bottomed flask, and then 50ml of methanol was added, in N 2 Protection, stirring and reflux reaction at 70°C for 48h. After the reaction, the mixture was poured into 150 ml of diethyl ether to settle and filter, and the product was placed in a vacuum oven to dry at room temperature for 24 hours to obtain biimidazolium bromide ionic liquid ([DIMB]Br). Yield: 65.6%.

[0046] (2) Preparation of biimidazolium bromide ionic liquid and cross-linking agent divinylbenzene (DVB) copolymer

[0047] [DIMB]Br (1.58g, 3.92mmol) was mixed with crosslinker DVB (0.26g, 1.96mmol) and added to a 100ml round bottom flask, followed by 50ml methanol and AIBN (0.021g, 0.013mmol). in...

Embodiment 2

[0049] (1) Synthesis of Biimidazolium Bromide Ionic Liquid ([DIMB]Br)

[0050] 1-vinylimidazole (4.00g, 42.5mmol) and 1,4-dibromobutane (4.75g, 22mmol) were mixed in a 2:1 molar ratio, added to a 100ml round-bottomed flask, and then 50ml of methanol was added, in N 2 Protection, stirring and reflux reaction at 70°C for 48h. After the reaction, the mixture was poured into 150 ml of diethyl ether to settle and filter, and the product was placed in a vacuum oven to dry at room temperature for 24 hours to obtain biimidazolium bromide ionic liquid ([DIMB]Br). Yield: 65.6%.

[0051] (2) Preparation of biimidazolium bromide ionic liquid and cross-linking agent divinylbenzene (DVB) copolymer

[0052] [DIMB]Br (1.98g, 4.9mmol) was mixed with cross-linking agent DVB (0.13g, 0.98mmol), added to a 100ml round bottom flask, then 50ml methanol and AIBN (0.021g, 0.013mmol) were added, N 2 Protection, at 70 ° C, stirring and reflux reaction for 24h. After the reaction, it was cooled to ...

Embodiment 3

[0054] (1) Synthesis of Biimidazolium Bromide Ionic Liquid ([DIMB]Br)

[0055] 1-vinylimidazole (4.00g, 42.5mmol) and 1,4-dibromobutane (4.75g, 22mmol) were mixed in a 2:1 molar ratio, added to a 100ml round-bottomed flask, and then 50ml of methanol was added, in N 2 Protection, stirring and reflux reaction at 70°C for 48h. After the reaction, the mixture was poured into 150 ml of diethyl ether to settle and filter, and the product was placed in a vacuum oven to dry at room temperature for 24 hours to obtain biimidazolium bromide ionic liquid ([DIMB]Br). Yield: 65.6%.

[0056] (2) Preparation of biimidazolium bromide ionic liquid and cross-linking agent divinylbenzene (DVB) copolymer

[0057] [DIMB]Br (2.18g, 5.4mmol) was mixed with cross-linking agent DVB (0.07g, 0.54mmol), added to a 100ml round bottom flask, then 50ml methanol and AIBN (0.021g, 0.013mmol) were added, N 2 Protection, at 70 ° C, stirring and reflux reaction for 24h. After the reaction, it was cooled to ...

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Abstract

The invention provides a catalyst with high catalytic activity, selectivity and stability, namely supported imidazole ion liquid cross-linked polymer nano particles, and belongs to the technical field of chemical synthesis. Experiments prove that the catalyst for the reaction of carbon dioxide and epoxy compound for generating a five-member ring compound has high selectivity (100 percent) and conversion rate (99.8 percent) and can be reclaimed and reused. In addition, a preparation method for the catalyst is simple and has mild reaction conditions, the catalyst is easily separated from a product by using a filter method, and any stabilizer or surfactant is not added in the synthesis process. The catalyst is suitable for large-scale production, and has wide application prospect in the fields of polymer nano carriers, industrial catalysis and the like.

Description

technical field [0001] The invention belongs to the field of chemistry, and relates to the preparation of a loaded imidazole ionic liquid crosslinked polymer nanoparticle. At the same time, the invention also relates to the application of the loaded imidazole ionic liquid crosslinked polymer nanoparticle—as a catalyst for CO 2 In the cycloaddition reaction with epoxy compounds. Background technique [0002] Currently, CO 2 Environmental issues such as the greenhouse effect and global warming have aroused widespread concern. CO 2 Non-toxic, non-combustible and non-flammable, it is one of the C1 resources with abundant natural resources. Therefore, putting CO 2 converted into useful chemicals and fuels, not only solve the 2 Environmental problems caused, but also to recycle resources. [0003] CO 2 There are a variety of chemical and biological methods for the fixation of CO, among which CO 2 The cycloaddition reaction with epoxy compounds to prepare cyclocarbonate is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F226/06C08F212/36C08F222/14B01J31/06C07D317/34
Inventor 熊玉兵王玉姣王荣民
Owner NORTHWEST NORMAL UNIVERSITY