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Application of a Porous MGO Catalyst in the Synthesis of Ethylene Carbonate

A technology of ethylene carbonate and catalyst, which is applied in the field of application of porous MgO catalyst in the synthesis of ethylene carbonate, can solve the problems of large catalyst usage, difficulty in catalyst separation and recovery, and low product yield, and achieve catalytic Significant performance, energy and cost savings, and short reaction times

Active Publication Date: 2021-02-26
CHANGSHU CHANGJI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The technical problem to be solved in the present invention is to provide a solution for the problems of large amount of catalyst used in the process of transesterification of dimethyl carbonate and butylene glycol to synthesize ethylene carbonate, difficulty in separation and recovery of the catalyst, and low product yield. A kind of simple operation, high catalytic efficiency, easy recovery of catalyst, good catalyst reusability, the method for the synthesis of ethylene carbonate with low production cost

Method used

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  • Application of a Porous MGO Catalyst in the Synthesis of Ethylene Carbonate
  • Application of a Porous MGO Catalyst in the Synthesis of Ethylene Carbonate

Examples

Experimental program
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Effect test

preparation example Construction

[0024] The porous MgO catalyst was prepared as follows:

[0025] (1) 1g polyethylene oxide-polypropylene oxide-polyethylene oxide (chemical formula is (C) in a beaker 2 h 4 O) 106 (C 3 h 6 O) 70 (C 2 h 4 O) 106 ) was dissolved in absolute ethanol, followed by adding 3g Mg(NO 3 ) 2 ·6H 2 O and 3g phenolic resin, stirred for 2h to make it fully contact, then coated on the glass, transferred to a 30°C constant temperature box for aging for 12h, scraped the film, transferred to a tube furnace, N 2 Calcined at 600°C for 6 hours in the atmosphere, and then the gas was switched to O 2 , heated to 350 ° C for 2 h to obtain porous MgO-1.

[0026] (2) 1g polyethylene oxide-polypropylene oxide-polyethylene oxide (chemical formula is (C) in a beaker 2 h 4 O) 106 (C 3 h 6 O) 70 (C 2 h 4 O) 106 ) was dissolved in absolute ethanol, followed by adding 5g Mg(NO 3 ) 2 ·6H 2 O and 7g of phenolic resin, stirred for 2 hours to make them fully contact, then coated on the gla...

Embodiment 1

[0031] Add 10mL of dimethyl carbonate, 10mL of 1-butene-3,4-diol and 1.04g of MgO-1 in sequence in the flask, put the flask into an oil bath, heat it with magnetic stirring, and raise the temperature to 100°C. Reaction 4h. After cooling down to room temperature, the reaction solution was centrifuged and analyzed. Ethylene carbonate selectivity 99.1%, yield 64.1%.

Embodiment 2

[0033] Add 19mL of dimethyl carbonate, 10mL of 1-butene-3,4-diol and 0.1g of MgO-1 in sequence in the flask, put the flask in an oil bath, heat it with magnetic stirring, and raise the temperature to 140°C. Reaction 8h. After cooling down to room temperature, the reaction solution was centrifuged and analyzed. Ethylene carbonate selectivity 98.7%, yield 24.5%.

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Abstract

The invention provides the application of a kind of porous MgO catalyst in synthesizing ethylene carbonate, the method adds dimethyl carbonate, 1-butene-3,4-diol and porous MgO catalyst to reaction system simultaneously, at 100~ React at 140°C for 1-8 hours. After the reaction, the catalyst can be reused after being filtered and washed. The method has the advantages of simple operation, high catalytic efficiency of the catalyst, good reusability of the catalyst, and can effectively reduce the production cost.

Description

technical field [0001] The invention relates to the application of a porous oxide catalyst in transesterification, in particular to the application of a porous MgO catalyst in the synthesis of ethylene carbonate. Background technique [0002] Vinyl ethylene carbonate (VEC) is a colorless transparent liquid at room temperature and is a special carbonate. Ethylene carbonate has a boiling point of 237°C / 733mmHg (1it.) and a flash point of 96°C. [0003] Vinylene carbonate (VC) is a film-forming additive that has been put into use and has good performance. However, the decomposition of VC in the battery is accompanied by CO 2 The release is not conducive to the formation of the electrode interface film. Compared with VC, ethylene carbonate (VEC) has a more stable structure, so it has attracted the attention of researchers. The C=C double bond in VEC makes it have a higher reducing ability, and its reduction potential is 1.0 V (vs. Li+ / Li). Applying it to a PC-based electroly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D317/36B01J21/10
CPCB01J21/10B01J35/10B01J37/0018C07D317/36
Inventor 傅人俊薛冰
Owner CHANGSHU CHANGJI CHEM
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