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Method and device for preparing ethyl methyl carbonate by utilizing dividing wall reactive distillation tower

A reactive distillation column, a technology of ethyl methyl carbonate, applied in the chemical method of reacting liquid with liquid, purification/separation of carbonate/haloformate, separation method, etc., can solve the complex process and energy consumption. And the problem of high equipment cost, to achieve the effect of low energy consumption and equipment cost, improve market competitiveness and high economic benefits

Inactive Publication Date: 2020-10-16
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned processes generally have the defects of complicated process, high energy consumption and equipment cost

Method used

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  • Method and device for preparing ethyl methyl carbonate by utilizing dividing wall reactive distillation tower

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Device of the present invention is used for ethyl methyl carbonate preparation process, as figure 1 As shown, it includes a dividing wall reactive distillation column, a condenser, a reboiler, and related feed lines and lines connecting the above equipment.

[0021] The dimethyl carbonate reactant added is 1kg, and the ethanol reactant with equimolar number is added, the sulfuric acid catalyst added is 2kg, the theoretical plate number of the pre-separation column section is 10, and the theoretical plate number of the main column section is 100 , the ethyl methyl carbonate product is extracted from the 50th theoretical plate of the main column section, the theoretical plate number of the public rectification section is 0, the theoretical plate number of the public stripping section is 50, and the liquid phase reflux enters the pre-separation column section The mass fraction is 0.01, the mass fraction of gas phase reflux into the pre-separation tower section is 0.01, the...

Embodiment 2

[0023] Device of the present invention is used for ethyl methyl carbonate preparation process, as figure 1 As shown, it includes a dividing wall reactive distillation column, a condenser, a reboiler, and related feed lines and lines connecting the above equipment.

[0024] The dimethyl carbonate reactant that adds is 1kg, and the ethanol reactant that adds 10 times of moles, the sulfuric acid catalyst that adds is 1kg, and the pre-separation column section theoretical plate number is 200, and the main column section theoretical plate number is 10, Extract the ethyl methyl carbonate product from the 10th theoretical plate of the main column section, the theoretical plate number of the public rectification section is 0, the theoretical plate number of the public stripping section is 50, and the mass of the liquid phase reflux entering the pre-separation column section The fraction is 0.99, the mass fraction of gas phase reflux entering the pre-separation tower section is 0.99, t...

Embodiment 3

[0026] Device of the present invention is used for ethyl methyl carbonate preparation process, as figure 1 As shown, it includes a dividing wall reactive distillation column, a condenser, a reboiler, and related feed lines and lines connecting the above equipment.

[0027] The dimethyl carbonate reactant that adds is 1kg, and the ethanol reactant that adds 10 times of moles, the sulfuric acid catalyst that adds is 1kg, and the pre-separation column section theoretical plate number is 100, and the main column section theoretical plate number is 10, Extract the ethyl methyl carbonate product from the 10th theoretical plate of the main column section, the theoretical plate number of the public rectification section is 0, the theoretical plate number of the public stripping section is 50, and the mass of the liquid phase reflux entering the pre-separation column section The fraction is 0.99, the mass fraction of gas phase reflux entering the pre-separation tower section is 0.99, t...

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Abstract

The invention relates to a method and a device for preparing ethyl methyl carbonate by utilizing a dividing wall reactive distillation tower. The device comprises a dividing wall reactive distillationtower, a condenser positioned on a tower top return pipeline of the dividing wall reactive distillation tower, and a reboiler positioned on a tower bottom return pipeline of the dividing wall reactive distillation tower; a vertical partition plate is arranged in the middle of the dividing wall reactive distillation tower and divides the dividing wall reactive distillation tower into a bottom common stripping section, a middle left pre-separation section, a middle right main tower section and a top common rectification section. An ethyl methyl carbonate product with a high purity can be prepared by the method and device, meanwhile, the energy consumption and the equipment cost are low, high economic benefits can be created, and the market competitiveness of the industry and enterprises isfurther improved.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a method and a device for preparing ethyl methyl carbonate by using a bulkhead reactive distillation tower. Background technique [0002] As a green asymmetric carbonate, ethyl methyl carbonate has the characteristics of dimethyl carbonate and diethyl carbonate, can react with alcohols, phenols, amines and esters, and is suitable for various organic reaction processes. Moreover, ethyl methyl carbonate has low stiffness, high dielectric constant, and good solubility to lithium salts, which can effectively improve the energy density and discharge capacity of lithium-ion batteries, improve battery safety performance, and prolong the service life of batteries. An organic electrolyte solution for lithium-ion batteries with excellent performance has high added value and broad development prospects. Today, the demand for electric vehicles is gradually and steadily increasing. Due to t...

Claims

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Application Information

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IPC IPC(8): B01D3/00B01D3/14B01J14/00C07C69/96C07C68/06C07C68/08
CPCB01D3/009B01D3/141B01J14/00C07C68/06C07C68/08C07C69/96Y02P20/10
Inventor 张文林饶佳宇
Owner HEBEI UNIV OF TECH
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