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Method for preparing methyl ethyl carbonate by adopting pipeline continuous reactor

A technology of ethyl methyl carbonate and pipeline reactor, applied in the purification/separation of carbonate/haloformate, preparation of carbon dioxide or inorganic carbonate, organic chemistry, etc., can solve the problem of long synthesis route and high energy consumption , the conversion rate of reactants and the low selectivity of products, etc., to achieve the effect of short time consumption, low energy consumption and low cost

Active Publication Date: 2022-03-04
重庆微而易科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1) The synthesis route from raw materials such as methanol and ethanol to ethyl methyl carbonate product is long, and the conversion rate of reactant and product selectivity are low;
[0007] 2) The products of each stage need to be separated by complex distillation, which results in high energy consumption

Method used

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  • Method for preparing methyl ethyl carbonate by adopting pipeline continuous reactor

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Comparison scheme
Effect test

Embodiment 1

[0045] 1. Pipeline continuous catalytic reaction: carbon dioxide, methanol, and ethanol react under the conditions of high-temperature and high-pressure catalysts (main components: aluminum oxide, zirconium phosphate, cerium oxide, and nickel) to finally generate ethyl methyl carbonate;

[0046] 1) 99% CO from CO2 storage tank 2 After pressurization, it is added from the middle and lower part of the pipeline reactor, and the raw materials methanol and ethanol (mass ratio 0.9:1.1) are mixed according to the proportion and then pumped from the middle and upper part of the pipeline reactor.

[0047] 2) CO 2 : The mass ratio of methanol and ethanol mixed alcohol (including methanol and ethanol returned to the pipeline after being separated from the top of the T3 tower) is 3:2.

[0048] 3) The operating pressure of the pipeline reactor is 4Mpa, and the reaction temperature is 120°C. The inside of the pipeline reactor is filled with fillers and catalysts (composed of aluminum oxide...

Embodiment 2

[0062] 1. Pipeline continuous catalytic reaction: carbon dioxide, methanol, and ethanol react under the conditions of high-temperature and high-pressure catalysts (main components: aluminum oxide, zirconium phosphate, cerium oxide, and nickel) to finally generate ethyl methyl carbonate;

[0063] 1) 99% CO from CO2 storage tank 2 After pressurization, it is added from the middle and lower part of the pipeline reactor, and the raw materials methanol and ethanol (mass ratio 1.2:1.5) are mixed according to the proportion and then pumped from the middle and upper part of the pipeline reactor.

[0064] 2) CO 2 : The mass ratio of methanol and ethanol mixed alcohol (including methanol and ethanol returned to the pipeline after being separated from the top of the T3 tower) is 5:3.

[0065] 3) The operating pressure of the pipeline reactor is 5Mpa, and the reaction temperature is 150°C. The inside of the pipeline reactor is filled with fillers, catalysts (composed of aluminum oxide, z...

Embodiment 3

[0075] 1. Pipeline continuous catalytic reaction: carbon dioxide, methanol, and ethanol react under the conditions of high-temperature and high-pressure catalysts (main components: aluminum oxide, zirconium phosphate, cerium oxide, and nickel) to finally generate ethyl methyl carbonate;

[0076] 1) 99% CO from CO2 storage tank 2 After pressurization, it is added from the middle and lower part of the pipeline reactor, and the raw materials methanol and ethanol (mass ratio 0.9:1.5) are mixed according to the proportion and then pumped from the middle and upper part of the pipeline reactor.

[0077] 2) CO 2 : The mass ratio of methanol and ethanol mixed alcohol (including methanol and ethanol returned to the pipeline after being separated from the top of the T3 tower) is 4:2.

[0078] 3) The operating pressure of the pipeline reactor is 3Mpa, and the reaction temperature is 90°C. The inside of the pipeline reactor is filled with fillers and catalysts (composed of aluminum oxide,...

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Abstract

The invention discloses a method for preparing methyl ethyl carbonate by adopting a pipeline continuous reactor, which comprises the following steps: preparing methyl ethyl carbonate by taking carbon dioxide, methanol and ethanol as raw materials through a pipeline continuous catalytic reactor, and then separating and purifying the methyl ethyl carbonate and a byproduct diethyl carbonate through rectification. According to the method, the comprehensive selectivity of the methyl ethyl carbonate is as high as 80-90%, and the obtained methyl ethyl carbonate reaches the electronic-grade purity.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for preparing ethyl methyl carbonate by using a pipeline continuous catalytic reactor. Background technique [0002] Methyl ethyl carbonate (Methyl Ethyl Carbonate, referred to as MEC), a colorless transparent liquid, is an excellent solvent. Since methyl ethyl carbonate has both methyl and ethyl groups in its molecular structure, it also contains dimethyl carbonate. (DMC) and diethyl carbonate (DEC) can react with alcohols, esters, phenols and amines, and are suitable for a variety of organic reactions. Moreover, because ethyl methyl carbonate has low viscosity, high dielectric constant, and strong solubility to lithium salts, it is an excellent electrolyte solvent for lithium-ion batteries, which can improve the energy density and discharge capacity of the battery, and can improve the performance of the battery. safety performance and service life. In add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C68/04C07C68/08C07C69/96
CPCC07C68/04C07C68/08C07C69/96Y02P20/141
Inventor 何睿鸣彭丽华张月娥
Owner 重庆微而易科技有限公司