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Method for synthesizing cyclic carbonate

A compound and carbon atom technology, applied in the field of catalytic synthesis of fine chemical products, can solve the problems of high cost, difficult separation of catalysts and products, etc., achieve stable properties, easy separation and recovery, and save production costs

Active Publication Date: 2012-11-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal catalysts have high catalytic activity, but the cost is high, and it is difficult to separate the catalyst from the product

Method used

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  • Method for synthesizing cyclic carbonate
  • Method for synthesizing cyclic carbonate
  • Method for synthesizing cyclic carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 0.116 g (0.5 mmol) of terpyridine and 0.463 g (5 mmol) of epichlorohydrin were respectively measured and added to a 25-mL stainless steel autoclave. After sealing the reactor, it was filled with 30 atm carbon dioxide at 25°C. Stir, heat to 150°C, keep warm and react for 20h. Then cool to room temperature and vent. Reaction result: The yield of chloropropylene carbonate was 91%.

[0038] The hydrogen nuclear magnetic spectrum of the product obtained in this example is as figure 1 As shown, the carbon spectrum is as figure 2 As shown, it can be seen from the figure that the product has a correct structure and is represented by formula I chloropropylene carbonate.

Embodiment 2

[0040] 0.116 g (0.5 mmol) of terpyridine and 0.463 g (5 mmol) of epichlorohydrin were respectively measured and added to a 25-mL stainless steel autoclave. After sealing the reactor, it was filled with 30 atm carbon dioxide at 25°C. Stir, heat to 160°C, keep warm and react for 20h. Then cool to room temperature and vent. Reaction result: The yield of chloropropylene carbonate was 88%.

[0041] The NMR results of the product obtained in this example are exactly the same as in Example 1, and will not be repeated here.

Embodiment 3

[0043] 0.116 g (0.5 mmol) of terpyridine and 0.463 g (5 mmol) of epichlorohydrin were respectively measured and added to a 25-mL stainless steel autoclave. After sealing the reactor, it was filled with 30 atm carbon dioxide at 25°C. Stir, heat to 110°C, keep warm and react for 20h. Then cool to room temperature and vent. Reaction result: The yield of chloropropylene carbonate was 76%.

[0044] The NMR results of the product obtained in this example are exactly the same as in Example 1, and will not be repeated here.

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Abstract

The invention discloses a method for synthesizing cyclic carbonate. The method comprises the following steps of: under the condition of using terpyridyl as a catalyst, carrying out cyclization reaction on an epoxy compound expressed by a formula II in a carbon dioxide atmosphere so as to obtain a compound expressed by a structural general formula I after reaction. The method uses the non-metallic organic molecule terpyridyl as a catalyst system, thereby efficiently preventing the pollution of metallic ions to a product (cyclic carbonate) caused by the use of the metallic catalyst and ensuring the requirement on the product as an electric product; the catalyst used for the invention is a stable non-metallic organic molecule and can be recycled for use, and the catalyst system is environment-friendly; and the reaction can be carried out in a solvent-free system, so that the reaction cost is reduced.

Description

Technical field [0001] The invention belongs to the field of catalytic synthesis of fine chemical products, and relates to a method for synthesizing cyclic carbonate. Background technique [0002] Cyclic carbonate is a very important chemical product with a very wide range of applications. As an aprotic solvent with strong polarity and stable properties, cyclic carbonate is an ideal solvent for battery electrodes and biological preparations. Its uses include electrode solvents for high-energy batteries and capacitors, and solvents for some cationic polymerization reactions. , Surfactants for sterilizing agents, and surfactants for controlling plant growth. At present, the annual output of cyclic carbonate in my country is about 1,000-2,000 tons, which is far below the 2-3 million tons required by the world market. Therefore, it is of great significance to develop a new process for efficient and green synthesis of cyclic carbonate. [0003] At present, the more mature industrial ...

Claims

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Application Information

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IPC IPC(8): C07D317/36
CPCY02P20/584
Inventor 华瑞茂曾仁沁
Owner TSINGHUA UNIV
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