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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 low catalytic activity and selectivity, toxic co-solvent or co-catalyst, low catalyst stability, etc., and achieves simple preparation method, mild reaction conditions, The effect of broad application prospects

Inactive Publication Date: 2011-05-11
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] Example 1. Preparation of supported imidazole ionic liquid cross-linked polymer nanoparticles (CLPN)

[0044] (1) Synthesis of biimidazolium bromide ionic liquid ([DIMB]Br)

[0045] Mix 1-vinylimidazole (4.00g, 42.5mmol) and 1,4-dibromobutane (4.75g, 22mmol) at a molar ratio of 2:1, add them to a 100ml round bottom flask, and then add 50ml methanol, In N 2 Protect, stir and reflux at 70℃ for 48h. After the completion of the reaction, the mixture was poured into 150 ml of ether to settle and filter, and the product was placed in a vacuum drying cabinet to dry at room temperature for 24 hours to obtain biimidazolium bromide ionic liquid ([DIMB]Br). Yield: 65.6%.

[0046] (2) Preparation of copolymer of biimidazole bromide ionic liquid and crosslinker divinylbenzene (DVB)

[0047] [DIMB]Br (1.58g, 3.92mmol) was mixed with cross-linking agent DVB (0.26g, 1.96mmol), added to a 100ml round bottom flask, and then 50ml of methanol and AIBN (0.021g, 0.013mmol) were added. In N 2 Prot...

Embodiment 2

[0049] (1) Synthesis of biimidazolium bromide ionic liquid ([DIMB]Br)

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

[0051] (2) Preparation of copolymer of biimidazole bromide ionic liquid and crosslinker divinylbenzene (DVB)

[0052] Mix [DIMB]Br (1.98g, 4.9mmol) and crosslinking agent DVB (0.13g, 0.98mmol), add them to a 100ml round bottom flask, then add 50ml of methanol and AIBN (0.021g, 0.013mmol), N 2 Protect, stir and reflux for 24h at 70°C. After the reaction, it was cooled to room temperature, settled in ether and filtered. The...

Embodiment 3

[0054] (1) Synthesis of biimidazolium bromide ionic liquid ([DIMB]Br)

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

[0056] (2) Preparation of copolymer of biimidazole bromide ionic liquid and crosslinker divinylbenzene (DVB)

[0057] Mix [DIMB]Br (2.18g, 5.4mmol) and crosslinking agent DVB (0.07g, 0.54mmol), add it to a 100ml round bottom flask, then add 50ml of methanol and AIBN (0.021g, 0.013mmol), in N 2 Protect, stir and reflux for 24h at 70°C. After the reaction, it was cooled to room temperature, settled in ether and filt...

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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 supported imidazole ionic liquid cross-linked polymer nanoparticle. At the same time, the invention also relates to the application of the supported imidazole ionic liquid cross-linked polymer nanoparticle-as a catalyst for CO 2 In the cycloaddition reaction with epoxy compounds. Background technique [0002] Currently, CO 2 The resulting environmental issues such as the greenhouse effect and global warming have attracted widespread attention. CO 2 It is non-toxic, does not support combustion or combustible, and is one of the C1 resources with abundant natural resources. Therefore, put CO 2 Into useful chemicals and fuels, not only solves the problems caused by CO 2 Environmental problems caused by, but also can make resources recycling. [0003] CO 2 There are many chemical and biological methods for the fixation, among which, CO 2 Cycloaddition reaction with epoxy compound...

Claims

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Application Information

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