Method for synthesizing cyclic carbonate ester in presence of acidic ionic liquid catalyst

A technology of acidic ionic liquid and cyclic carbonate, applied in the direction of organic chemistry, can solve the problems of environmental pollution cost, low catalyst activity, harsh reaction conditions, etc., and achieve the effect of reducing production cost, high reactivity and mild reaction conditions

Inactive Publication Date: 2010-06-16
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of severe reaction conditions, low catalyst activity, environmental pollution and high cost in the existing synthetic cyclic carbonate method, and provides Acidic ionic liquid catalyzed method for synthesizing cyclic carbonate

Method used

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  • Method for synthesizing cyclic carbonate ester in presence of acidic ionic liquid catalyst
  • Method for synthesizing cyclic carbonate ester in presence of acidic ionic liquid catalyst
  • Method for synthesizing cyclic carbonate ester in presence of acidic ionic liquid catalyst

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specific Embodiment approach 1

[0008] Specific implementation mode one: in this implementation mode The method for the catalyzed synthesis of cyclic carbonates by acidic ionic liquids is as follows: add Acidic ionic liquid (as catalyst), then add epoxy compound, The molar ratio of the acidic ionic liquid to the epoxy compound is 1-10:100, the autoclave is sealed, the pressure in the autoclave is 0.1-10 MPa by feeding carbon dioxide, the heating rate is raised to the reaction temperature, the reaction temperature is 50-200 ° C, and the temperature is kept React at constant pressure for 0.5-10 hours, then cool the autoclave to room temperature, then slowly release carbon dioxide, and distill under reduced pressure to obtain a cyclic carbonate.

[0009] In this embodiment, the slow release of carbon dioxide is to prevent the product from being taken out.

specific Embodiment approach 2

[0010] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is: the The molar ratio of the acidic ionic liquid to the epoxy compound is 2-8:100. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Specific implementation mode three: the difference of this implementation mode specific implementation mode one is: the The molar ratio of the acidic ionic liquid to the epoxy compound is 4-7:100. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention discloses a method for synthesizing cyclic carbonate ester in presence of an acidic ionic liquid catalyst, which relates to a method for synthesizing the cyclic carbonate ester. The invention solves the problems of strict reaction conditions, low catalyst activity, environmental pollution and high cost of the traditional method for synthesizing the cyclic carbonate ester. In the method of the invention, the acidic ionic liquid catalyst is adopted, and carbon diode and an epoxy compound undergo cycloaddition to form the corresponding cyclic carbonate ester. The method has the advantages of mild reaction conditions, high catalyst activity, environmental protection and low cost.

Description

technical field [0001] The invention relates to a method for synthesizing cyclic carbonate; in particular, it relates to a method for synthesizing cyclic carbonate by carbon dioxide and epoxy compound through cycloaddition reaction. Background technique [0002] Cyclic carbonate is a very good polar solvent, which is widely used in the synthesis of pharmaceuticals and fine chemical intermediates, especially the ethylene carbonate developed in recent years by transesterification with methanol The method is to prepare dimethyl carbonate, so that the demand for cyclic carbonate is increasing day by day. In the research work of synthesizing cyclic carbonates, the development of new catalysts has received more and more attention. The catalyst systems that have been reported so far include quaternary ammonium salts, organic bases, transition metal complexes and MgO-Al 2 o 3 etc. (X.Yin, J.R.Moss, Coord.Chem.Rev.1999, 181, 27; R.L.Paddock, S.T.Nguyen, J.Am.Chem.Soc.2001, 121, 11...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/46C07D317/36
Inventor 肖林飞吴伟吕东伟
Owner HEILONGJIANG UNIV
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