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A kind of imidazolium salt organic polymer catalyst and its preparation method and application

A technology of polymer and imidazolium salt is applied in the field of imidazolium salt organic polymer catalyst and preparation thereof, and achieves the effects of easy diffusion, hard loss and easy recycling.

Active Publication Date: 2020-05-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalyst activity needs to be further improved

Method used

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  • A kind of imidazolium salt organic polymer catalyst and its preparation method and application
  • A kind of imidazolium salt organic polymer catalyst and its preparation method and application
  • A kind of imidazolium salt organic polymer catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Under 298K and an inert gas protection atmosphere, 10.0 grams of Vinyl ILBr monomer (attached figure 1 , n=1, X=Br) was dissolved in 100.0ml tetrahydrofuran solvent, while adding 2.5g crosslinking agent tris (4-vinylphenyl) phosphine (L1), adding 1.0 gram of free radical initiator couple to the above solution Azodiisobutyronitrile, stirred for 2 hours. The stirred solution was moved to an autoclave, and polymerized by solvothermal polymerization at 373K and an inert gas atmosphere for 24 hours. After the above polymerized solution is cooled to room temperature, the solvent is removed under vacuum at room temperature to obtain an organic polymer carrier copolymerized with Vinyl ILBr and tris(4-vinylphenyl)phosphine organic monomer. figure 2 It is a schematic diagram of the polymerization technical route of Vinyl ILBr organic mixed polymer carrier. Weigh 70 mg of ZnBr 2 Dissolve in 10.0ml tetrahydrofuran solvent, add 1.0 gram by Vinyl ILBr and three (4-vinylphenyl) ph...

Embodiment 2

[0054] In embodiment 2, except taking by weighing 10.0 grams of crosslinking agent tris (4-vinylphenyl) phosphine (L1), instead of 2.5 grams of crosslinking agent tris (4-vinylphenyl) phosphine (L1), the remaining The catalyst synthesis process is the same as in Example 1.

Embodiment 3

[0056] In Example 3, except that 0.1 gram of free radical initiator azobisisobutyronitrile was weighed instead of 1.0 gram of free radical initiator azobisisobutyronitrile, the rest of the catalyst synthesis process was the same as that of Example 1.

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Abstract

The invention relates to an imidazolium salt organic polymer catalyst and its preparation method and application. The imidazolium salt organic polymer is self-polymerized or mixed with a cross-linking agent, and the obtained organic Lewis acid is added or not added to the polymer, when the Lewis acid is added, metal ions in the acid coordinate with N and / or P in the organic polymer, and the obtained product is an imidazolium salt organic polymer catalyst. The obtained imidazolium salt organic polymer catalyst is suitable for reactors such as fixed bed, slurry bed, tank reactor and trickle bed. The catalyst provided by the invention has good performance in the reaction of epoxy compound and carbon dioxide to produce cyclocarbonate, has high activity, good selectivity for forming cyclocarbonate, and strong substrate applicability. Moreover, the catalyst has good stability, and the separation of the catalyst, reactants and products is simple and efficient.

Description

technical field [0001] The invention belongs to the field of heterogeneous catalysis and fine chemical industry, and in particular relates to an imidazolium salt organic polymer catalyst and its preparation method and application. Background technique [0002] In recent years, with the continuous development of the world's industrialization process, CO 2 emissions are increasing, global warming and climate anomalies are becoming increasingly severe; on the other hand, CO 2 It is also a cheap and valuable C1 resource that exists in abundance in nature. Therefore, the conversion of carbon dioxide into high value-added chemicals has attracted more and more attention from scientists. [0003] The addition reaction of carbon dioxide and epoxide can generate cyclocarbonate, an important chemical raw material. This is a 100% atom-economical reaction with no by-products formed, which are CO 2 An important way of transformation and utilization. Cyclocarbonate has the advantages ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/24B01J35/10C07D317/36
CPCY02P20/141
Inventor 丁云杰李存耀汪文龙严丽
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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