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Preparation method of ethylene carbonate

A technology of ethylene carbonate and ethylene oxide, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, organic chemistry, etc., can solve the problems of low catalyst activity and easy deactivation, and achieve Enhance swelling resistance and prevent deactivation

Active Publication Date: 2016-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem of low catalyst activity and easy deactivation in the prior art, and a new method for preparing ethylene carbonate is provided

Method used

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  • Preparation method of ethylene carbonate
  • Preparation method of ethylene carbonate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 58.0 grams of styrene, 0.6 grams of divinylbenzene, 30 grams of polystyrene and 0.6 grams of benzoyl peroxide initiator in a 500 milliliter three-necked flask, and stir for 2.0 hours at 60°C; then add 2.8 grams of multi-walled carbon Nanotubes, continue stirring for 1 hour for pre-polymerization. 260 mL of deionized water in which 2.5 g of polyvinyl alcohol had been dissolved was added. Adjust the stirring speed, while gradually raising the temperature to 80°C, and react for 5 hours; then raise the temperature to 90°C, react for 5 hours, and finally raise the temperature to 98°C, and react for 6 hours. After the reaction, pour out the upper liquid, wash with 85°C hot water, then wash with cold water, then filter, put in an oven to dry at 80°C, sieve, and collect composite microspheres with a particle size within the range of 0.35 to 0.60 mm a.

[0029] Chloromethylation of composite microspheres: In a 500-ml three-necked flask, add 50 grams of composite microspher...

Embodiment 2

[0033] In a 500 milliliter three-necked flask, add 20 grams of composite chlorine spheres A obtained in [Example 1], 150 milliliters of toluene, and 35.0 grams of N-propenylimidazole, stir and react under reflux for 30 hours, filter and remove the mother liquor after the reaction finishes, Wash with dichloromethane, acetone and water successively, and dry under vacuum to obtain chlorine-type composite imidazole-based resin A3.

[0034]The transformation of chlorine-type composite imidazole-based resin: in a 200 ml beaker, add 10 grams of chlorine-type composite imidazole-based resin A3, 20 grams of KI and 40 grams of deionized water, stir at room temperature for 18 hours, filter, and wash with deionized water , repeat the above process twice, filter, wash with deionized water, and dry under vacuum to obtain a halogen-type composite imidazole-based resin A4.

Embodiment 3

[0036] Add monomer mixture solution (60.0 gram styrene, 1.7 gram divinylbenzene, 60 gram polystyrene, 1.6 gram multi-walled carbon nanotube and 1.0 gram benzoyl peroxide containing initiator in 500 milliliters of three-necked flasks, The solution was first stirred and reacted at 70°C for 0.5 hours), started the agitator, added a mixed solution of 200 milliliters of deionized water and 5 grams of gelatin, raised the temperature to 85°C, reacted for 3 hours, then raised the temperature to 90°C, reacted for 9 hours, and finally The temperature was raised to 100° C., and the reaction was carried out for 10 hours. After the reaction, pour out the upper liquid, wash with 85°C hot water, then wash with cold water, then filter, put in an oven to dry at 80°C, sieve, and collect composite microspheres with a particle size within the range of 0.35 to 0.60 mm b.

[0037] Chloromethylation of composite microspheres: In a 500-ml three-necked flask, add 50 grams of composite microspheres B ...

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Abstract

The invention relates to a preparation method of ethylene carbonate, and mainly solves the problems of low activity and easy inactivation of catalysts in the prior. According to a technical scheme, ethylene oxide and carbon dioxide are adopted as the raw materials, under the conditions of a reaction temperature of 60-200DEG C, a reaction pressure of 0.1-10.0MPa, and a catalyst / ethylene oxide weight ratio of 0.001-1, the reaction raw materials and the catalyst contact to generate ethylene carbonate; and the catalyst is halogen composite imidazolyl resin. The method well solves the problems, and can be used for the industrial production of ethylene carbonate from ethylene oxide and carbon dioxide.

Description

technical field [0001] The present invention relates to a method for preparing ethylene carbonate. Background technique [0002] Ethylene carbonate is an excellent solvent and fine chemical intermediate, and a potential basic raw material for organic chemical industry. At the same time CO 2 is a greenhouse gas, how to effectively fix it has become one of the most challenging issues in this century, and through ethylene oxide and CO 2 Reactive synthesis of ethylene carbonate is one of the good fixation methods. With the recent increasing attention to the co-production of dimethyl carbonate and ethylene glycol using ethylene carbonate as a raw material, the fixation of CO by cyclic carbonate 2 approach has also received increasing attention. [0003] Most of the methods for the production of cyclic carbonates reported at present are binary homogeneous catalysts using Lewis acid metal compounds and Lewis bases, wherein the Lewis acid metal compounds used include alkali (ear...

Claims

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Application Information

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IPC IPC(8): C07D317/38B01J31/06
Inventor 陈梁锋何文军
Owner CHINA PETROLEUM & CHEM CORP
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