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Process for synthesizing cyclic carbonate with catalysis of solid carried ion liquid catalyst

A cyclic carbonate, ionic liquid technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc. lower problem

Active Publication Date: 2008-12-10
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many types of catalysts reported, there are still problems such as low reactivity, long reaction time, and easy loss. Therefore, it is very important to develop a catalytic system with high activity, mild reaction conditions and stability.

Method used

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  • Process for synthesizing cyclic carbonate with catalysis of solid carried ion liquid catalyst
  • Process for synthesizing cyclic carbonate with catalysis of solid carried ion liquid catalyst
  • Process for synthesizing cyclic carbonate with catalysis of solid carried ion liquid catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The modified MCM-41 reference [Nie Chunfa, Suo Jiquan. Molecular Catalysis, 2004, 18(1):61] was prepared. 4g of modified MCM-41 and 2g of imidazole were refluxed in xylene for 4h, filtered, and the solid was washed with absolute ethanol and dried under vacuum at 60°C, then 5g of imidazole-modified MCM-41 was taken and 3g of bromoethane was added. Reflux in xylene at 120°C for 24h, filter, and dry to obtain ethylimidazolium bromide ionic liquid supported by MCM-41.

Embodiment 2

[0014] The modified MCM-41 was prepared in the same manner as in Example 1. 4g of the modified MCM-41 and 3g of imidazole were refluxed in xylene for 4h, filtered, the solid was washed with absolute ethanol, and dried in vacuum at 60°C, and 5g of imidazole was taken. Add 3.5g of bromobutane, reflux in xylene at 120°C for 24h, filter and dry to obtain MCM-41-supported butylimidazolium bromide ionic liquid.

Embodiment 3

[0016] The modified MCM-41 was prepared in the same manner as in Example 1. 4g of the modified MCM-41 and 2g of imidazole were refluxed in xylene for 4h, filtered, the solid was washed with absolute ethanol, and dried under vacuum at 60°C, and then 5g of imidazole was taken. Add 4g of bromohexane, reflux in xylene at 120°C for 24h, filter and dry to obtain the hexylimidazolium bromide ionic liquid supported by MCM-41.

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Abstract

The invention relates to a method for synthesizing a cyclic carbonate ester by the catalysis of immobilized ionic liquid. The invention is characterized by utilizing a chemical method to prepare an immobilized ionic liquid catalyst. In the method, a mesoporous molecular sieve is used as a carrier; and the immobilized ionic liquid catalyst is prepared through different steps and catalyzes an epoxy compound to produce the cyclic carbonate ester. Compared with the prior immobilized catalyst, the immobilized catalyst is utilized to greatly improve a yield rate and selectivity in a short reaction time under a lower reaction temperature and a lower reaction pressure.

Description

Technical field: [0001] The invention relates to a method for catalyzing and synthesizing cyclic carbonates with immobilized ionic liquid. In the present invention, the above-mentioned catalyst is used in the cycloaddition reaction of epoxy compounds, the reaction temperature and pressure are reduced, and higher yield and selectivity of cyclic carbonate are obtained. Background technique: [0002] Cyclic carbonate is an important chemical product with many uses. It has the characteristics of low toxicity, biodegradability, and high boiling point. It can be used as an inert solvent, raw material for polyacrylonitrile fiber, fuel, lubricating oil, hydraulic fluid Additives also play an important role in the pharmaceutical industry and polymer synthesis industry. Due to the continuous development of industrialization, CO 2 As a greenhouse gas, it has also been increasing in a large amount. How to make better use of CO 2 Turning waste into treasure is not only of great significance f...

Claims

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Application Information

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IPC IPC(8): C07D317/36B01J31/02
Inventor 张锁江任俊毅成卫国孙剑孟震英李谦
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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