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Method for synthesizing methylethyl carbonate by ester exchange of dimethyl carbonate and diethyl carbonate

A technology of diethyl carbonate and ethyl methyl carbonate, which is applied in the field of synthesizing ethyl methyl carbonate using ionic liquid as a catalyst, can solve the problems of high cost, poor selectivity, and low product yield, and achieve long life, High catalytic activity and cost reduction effects

Active Publication Date: 2013-01-09
灯塔森佳新能源合伙企业(有限合伙)
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  • 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 aimed at defects such as low product yield, poor selectivity, difficult recycling of the catalyst, and high cost in the synthesis of ethyl methyl carbonate. In order to solve the above problems, the present invention provides a catalytic The activity is high, the selectivity is higher, and after the reaction, it can be recovered and continued to be recycled through simple treatment, and the method for synthesizing ethyl methyl carbonate with reduced cost

Method used

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  • Method for synthesizing methylethyl carbonate by ester exchange of dimethyl carbonate and diethyl carbonate
  • Method for synthesizing methylethyl carbonate by ester exchange of dimethyl carbonate and diethyl carbonate

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Embodiment 1

[0024] Add reaction material dimethyl carbonate and diethyl carbonate in the reactor, its mol ratio is 1:1, 1-butyl-2-methyl-3-ethylimidazolium bromide is as catalyzer, and used catalyst amount is The reactant is 1% of the mass of diethyl carbonate, the reaction temperature is 120°C, and the reaction time is 24h. Under these reaction conditions, the yield of ethyl methyl carbonate is 57.41%, and the selectivity is 100%.

Embodiment 2

[0026] Add reaction material dimethyl carbonate and diethyl carbonate in the reactor, its mol ratio is 1:1, and 1-methyl-2-butyl-3-methylimidazolium chloride is as catalyzer, and used catalyst amount is The mass of the reactant diethyl carbonate is 0.2%, the reaction temperature is 120°C, and the reaction time is 12h. Under these conditions, the yield of ethyl methyl carbonate is 37.58%, and the selectivity is 100%.

Embodiment 3

[0028] Add reaction material dimethyl carbonate and diethyl carbonate in the reactor, its molar ratio is 1:1, 1-butyl-2-methyl-3-butylimidazolium hexafluorophosphate is used as catalyst, and the amount of catalyst used It is 2% of the mass of the reactant diethyl carbonate, the reaction temperature is 100°C, and the reaction time is 20h. Under these reaction conditions, the yield of ethyl methyl carbonate is 22.15%, and the selectivity is 100%.

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Abstract

The invention relates to a method for synthesizing methylethyl carbonate by ester exchange of dimethyl carbonate and diethyl carbonate, which is implemented by carrying out synthetic reaction of methylethyl carbonate on raw materials dimethyl carbonate and diethyl carbonate by using an imidazole ionic liquid as a catalyst at certain reaction temperature under ordinary pressure for some reaction time. The catalyst consumption is only 0.2-2 wt% of the dimethyl carbonate; the ionic liquid catalyst has high catalytic activity in the reaction process, the maximum yield of methylethyl carbonate is up to 62.31%, and the selectivity is 100%; and the catalyst can be recycled for cyclic utilization after being subjected to simple treatment after reaction, has the advantages of long service life and no pollution, and greatly lowers the preparation cost of methylethyl carbonate.

Description

technical field [0001] The present invention relates to a kind of synthetic method of ethyl methyl carbonate, particularly a kind of method that adopts ionic liquid to synthesize ethyl methyl carbonate as catalyst. Background technique [0002] With the rapid development of lithium-ion batteries, the requirements for battery safety and service life are becoming more and more stringent, which brings challenges to the technological innovation of battery electrolytes. At present, the quality of domestically synthesized electrolyte solvents cannot meet the use standards, so electrolyte solvents are generally imported from abroad. In recent years, it has been found that ethyl methyl carbonate can be used as a good electrolyte for lithium-ion batteries. Ethyl methyl carbonate is a A wide range of asymmetric carbonate compounds, mainly used as solvents and intermediates in organic synthesis, when used as electrolyte solvents for lithium-ion batteries, due to its low viscosity, high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/96C07C68/06
CPCY02P20/584
Inventor 薛冰苏进李永昕亓虎许杰
Owner 灯塔森佳新能源合伙企业(有限合伙)
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