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Dimethoxym ethane catalytic distillation production process and production equipment thereof

A methylal catalytic refining technology, acetal catalytic refining technology, applied in the chemical industry, preparation of organic compounds, organic chemistry and other directions, can solve the problems of difficult catalyst replacement, catalyst wear, catalyst loss, etc., to save equipment costs and operation. The effect of low cost, equipment corrosion, production energy consumption and low cost

Inactive Publication Date: 2011-05-25
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the catalyst for the production of methylal by catalytic rectification is generally directly packed in the catalyst bed of the reaction section in the form of bulk, or directly added in the tower kettle, although these packing methods can make the catalyst soaked in the liquid In the phase, the catalyst is evenly distributed, the gas-liquid-solid contact is good, and the utilization rate is high, but its disadvantage is that the pressure drop is large, or the catalyst is worn and broken due to flow, which in turn causes the loss of the catalyst, and the catalyst is difficult to replace

Method used

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  • Dimethoxym ethane catalytic distillation production process and production equipment thereof
  • Dimethoxym ethane catalytic distillation production process and production equipment thereof
  • Dimethoxym ethane catalytic distillation production process and production equipment thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Attached figure 1 In the process flow shown, the raw material methanol passes through the methanol cation column and the preheater, and the flow rate is 4.0m 3 / h, temperature 50°C, raw formaldehyde solution (37%wt) passes through formaldehyde cation column, flow rate is 3.0m 3 / h, the temperature is 30°C, respectively enter the reaction section of the catalytic rectification tower, the molar ratio of methanol and formaldehyde is 2.50:1, under the action of the catalyst, the two raw materials undergo acetal reaction in the reaction section and perform vapor-liquid mass transfer Exchange, realize the process of continuous catalytic distillation.

[0040] The material of the entire tower body is SUS304, and the rectification section and the stripping section are filled with CY700 packing, wherein the number of theoretical plates in the rectification section is 10, the number of theoretical plates in the reaction section is 12, and the number of theoretical plates in the ...

Embodiment 2

[0047] Attached figure 1 As shown in the process flow, the flow rate of methanol is 3.2m 3 / h, formaldehyde solution (37%wt) flow rate 3.0m 3 / h, respectively enter the reaction section of the catalytic rectification tower, the molar ratio of methanol and formaldehyde is 2:1, the catalyst structural unit is a cylindrical structural unit composed of small bags with a length and width of 60×15 mm filled with cation exchange resin side by side The corrugated body and the same size corrugated 70-mesh stainless steel mesh with a tooth angle of 60 degrees are stacked together to form a bundle. Each tooth-shaped corrugation on the stainless steel mesh forms an inclination angle of 45° with the edge of the mesh.

[0048] The material of the entire tower body is SUS304, and the rectification section and the stripping section are filled with CY700 packing. The number of theoretical plates in the rectification section is 15, the number of theoretical plates in the reaction section is 20...

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Abstract

The invention relates to a dimethoxym ethane catalytic distillation production process and production equipment thereof. The process comprises the following steps that: raw materials of methanol and formaldehyde respectively enter a reaction zone from the lower part and the upper part of the reaction zone, the two raw materials carry out aldolization and steam-liquid mass transfer in the reaction zone under the effect of catalysts, and the continuous catalytic distillation process is realized. The production equipment is characterized in that a catalytic distillation device adopts a tower device, cation exchange resin is used as the catalysts, the catalysts of the cation exchange resin are filled in a bundling bag mode to form catalyst structural units, and the structural units form the reaction zone in a rectifying tower, wherein the catalyst structural units are formed through vertical and staggered arrangement. The invention adopts the catalytic distillation tower filled with catalyst bundling bags to produce dimethoxym ethane and has the advantages of high yield, small circulation quantity, low energy consumption and the like.

Description

technical field [0001] The invention relates to a new process and new equipment for producing methylal with formaldehyde and methanol as raw materials. Background technique [0002] Methylal, also known as dimethoxymethane, is a colorless transparent liquid. Melting point -104.8°C, boiling point 45.5°C; miscible with alcohol, ether, acetone, etc., and its solubility is stronger than that of ether and acetone. Methylal has the characteristics of good solubility, low boiling point, and high oxygen content, so it has the following uses: as an oil additive, there is no environmental problem; as a good organic solvent, it is widely used in cosmetics, pharmaceuticals, paints and Rubber industry and other fields; as a cleaning agent for electronic products, it can replace F11 and F13 and chlorinated solvents, and can also replace Freon, reducing the emission of volatile organic compounds (VOCs); methylal can also be used to synthesize high-purity formaldehyde; In recent years, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/30C07C41/56
CPCY02P20/10
Inventor 王红星迪建东
Owner FUZHOU UNIV
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