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

An acidic ionic liquid, cyclic carbonate technology, applied in organic chemistry and other directions, can solve the problems of low catalyst activity, harsh reaction conditions, environmental pollution costs, etc., and achieve the effects of high reaction activity, mild reaction conditions, and lower production costs.

Inactive Publication Date: 2013-02-27
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 harsh 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

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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

[0009] Specific embodiment 1: In this embodiment The method of catalyzed synthesis of cyclic carbonate by acidic ionic liquid is as follows: add into the autoclave Acidic ionic liquid (as a catalyst), then add epoxy compound, The molar ratio of the acidic ionic liquid to the epoxy compound is 1-10:100, the autoclave is closed, the pressure inside the autoclave is 0.1-10MPa when carbon dioxide is introduced, the heating rate is raised to the reaction temperature, and the reaction temperature is 50-200°C. 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 cyclic carbonate.

[0010] In this embodiment, the slow release of carbon dioxide is to prevent the product from being carried out.

specific Embodiment approach 2

[0011] Specific embodiment two: the specific embodiment one of this embodiment is different in that: The molar ratio of acidic ionic liquid to epoxy compound is 2-8:100. The other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Specific embodiment three: the specific embodiment one of this embodiment is different: the The molar ratio of acidic ionic liquid to epoxy compound is 4-7:100. The 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 present invention relates to a method for synthesizing cyclic carbonate; in particular, it relates to a method for synthesizing cyclic carbonate from carbon dioxide and epoxy compound through cycloaddition reaction. Background technique [0002] Cyclic carbonate is a very good polar solvent. It has a wide range of applications in the synthesis of pharmaceutical and fine chemical intermediates, especially those developed in recent years that use ethylene carbonate as a raw material and exchange with methanol ester. The method for preparing dimethyl carbonate increases the demand for cyclic carbonate. In the research work on the synthesis of cyclic carbonates, the development of new catalysts has received more and more attention. The catalyst systems that have been reported include quaternary ammonium salts, organic bases, transition metal complexes and MgO-Al 2 O 3 (X. Yin, JRMoss, Coord. Chem. Rev. 1999, 181, 27; RLPaddock, STNguyen, J. Am. Chem. Soc. ...

Claims

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Application Information

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