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Synthesis method for cyclic carbonate under catalysis of supported Bronsted acidic ionic liquid catalyst

A technology of acidic ionic liquid and cyclic carbonate, applied in the field of synthesis of cyclic carbonate, can solve the problems of high energy consumption in the separation process, difficulty in catalyst recovery, etc., achieve reduced production costs, good industrial application prospects, and mild reaction conditions Effect

Inactive Publication Date: 2011-10-05
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The present invention solves the technical problems of difficult catalyst recovery and high energy consumption in the separation process in the existing method for preparing cyclic carbonate; Acidic ionic liquid catalyst catalyzed method for synthesizing cyclic carbonate

Method used

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  • Synthesis method for cyclic carbonate under catalysis of supported Bronsted acidic ionic liquid catalyst
  • Synthesis method for cyclic carbonate under catalysis of supported Bronsted acidic ionic liquid catalyst
  • Synthesis method for cyclic carbonate under catalysis of supported Bronsted acidic ionic liquid catalyst

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specific Embodiment approach 1

[0009] Specific implementation mode one: in this implementation mode, immobilization The method for the synthesis of cyclic carbonates catalyzed by acidic ionic liquids is carried out in the following steps: The acidic ionic liquid catalyst is added in the autoclave, and the solid-supported Acidic ionic liquid catalysts are supported on the surface of the carrier or in the pores Catalysts for acidic ionic liquids, and press The molar ratio of acidic ionic liquid to epoxy compound is 1-8:100. Add epoxy compound to the autoclave, seal the autoclave, feed carbon dioxide until the pressure in the autoclave is 0.5-5MPa, heat up to the reaction temperature, and react The temperature is 80-200°C, heat preservation and constant pressure reaction for 1.0-10 hours, then cool the autoclave to room temperature, slowly release carbon dioxide, filter and distill under reduced pressure to obtain cyclic carbonate.

[0010] In this embodiment, the highest yield of cyclic carbonate is 9...

specific Embodiment approach 2

[0012] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the chemical formula of the epoxy compound is where R 1 - for H-, R 2 - is H-, CH 3 -, ClCH 2 -, C 4 h 9 -, C 2 h 3 -or Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the immobilized Acidic ionic liquid catalyst supported The chemical formula of acidic ionic liquid is or In the formula n=2~6, m=1~3, X is Cl, Br, I or HSO 4 . Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a synthesis method for a cyclic carbonate under catalysis of a supported acidic ionic liquid catalyst, relates to a synthesis method for the cyclic carbonate, and mainly solves the technical problems that the catalyst is difficult to recover and the energy consumption is high during the separation process in the existing cyclic carbonate preparation methods. The method provided by the invention comprises the following steps of: adding the supported acidic ionic liquid catalyst to an autoclave, adding an epoxy compound, closing the autoclave, introducing carbon dioxide to the autoclave until the internal pressure of the autoclave is 0.5-5 MPa, heating to the reaction temperature of 80-200 DEG C, reacting while maintaining the pressure and temperature for 1.0-10 hours, cooling the autoclave to room temperature, slowly discharging carbon dioxide, filtering and distilling under reduced pressure to obtain the cyclic carbonate. The catalytic synthesis method has the advantages of mild reaction conditions, high catalyst activity, easy separation of the catalyst from a product, recyclable catalyst, etc.

Description

technical field [0001] The invention relates to a synthesis method of 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] Currently, CO as the main greenhouse gas 2 The amount of emissions is increasing at an annual rate of 4%, which has seriously affected human production and life. At the same time, CO 2 It is also the most abundant and cheapest C on earth. 1 resource. Achieve CO under relatively mild conditions 2 The chemical immobilization of methionine meets the requirements of sustainable development and green production process, and has become one of the hot issues in academic research and industrialization process. Using CO 2 Synthesis of cyclic carbonates with epoxides is CO 2 One of the important ways of resource utilization, in which carbon dioxide is utilized as a carbon-oxygen resource, is an atom-economical reaction, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/36C07D317/46
CPCY02P20/584
Inventor 肖林飞吕东伟苏丹吴伟
Owner HEILONGJIANG UNIV
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