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Method and device for removing light components in trioxymethylene

A technology for trioxymethylene and light components, which is applied in fractionation, organic chemistry and other directions, can solve the problems of high energy consumption of towers, small operation flexibility for removing light components, easy decomposition of trioxymethylene, etc. Reduces, avoids massive decomposition, and improves product purity

Active Publication Date: 2012-08-15
XINGTAI RISUN COAL CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology increases the amount of time it takes for removing gases from liquids by breaking them down into smaller parts that are easier to remove with less energy than traditional methods like evaporation or distillation. It also helps prevent damage caused by excessive heating during this step.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency or effectiveness of producing polymer materials containing trioxanes during chemical reaction processes like those described earlier. Specifically, current methods involve complicated steps that require multiple solvents/distilling agents and expensive equipment.

Method used

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  • Method and device for removing light components in trioxymethylene
  • Method and device for removing light components in trioxymethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Send the extracted mixture of paraformaldehyde, benzene, a small amount of water and organic matter into the light removal tower, and carry out the removal under the conditions of tower bottom temperature 120°C, tower top temperature 79°C, reflux ratio 2, and pressure 2Kpa. Light, the top gas of the light removal tower returns to the extraction process after being condensed and cooled.

[0020] (2) The mixture of paraformaldehyde and trace amounts of water, methanol, formaldehyde, formic acid, etc. at the bottom of the tower after light removal is sent to the stripping tower. The stripping tower uses nitrogen as the stripping medium. The stripping is carried out at a temperature of 115°C and a pressure of 1Kpa.

[0021] After detection and analysis, the content of paraformaldehyde in the bottom of the stripping tower is 99.99%, the content of methanol is 27ppm, the content of formaldehyde is 28ppm, the content of formic acid is 14ppm, and the content of water is 22p...

Embodiment 2

[0023] (1) Send the extracted mixture of paraformaldehyde, benzene, a small amount of water and organic matter into the light removal tower, and carry out the removal under the conditions of tower bottom temperature 122°C, tower top temperature 79°C, reflux ratio 3, and pressure 5Kpa. Light, the top gas of the light removal tower returns to the extraction process after being condensed and cooled.

[0024] (2) The mixture of paraformaldehyde and trace amounts of water, methanol, formaldehyde, formic acid, etc. at the bottom of the tower after light removal is sent to the stripping tower. The stripping tower uses nitrogen as the stripping medium. The stripping is carried out under the conditions of temperature 116°C and pressure 5Kpa.

[0025] After detection and analysis, the content of paraformaldehyde in the bottom of the stripping tower is 99.97%, the content of methanol is 40ppm, the content of formaldehyde is 35ppm, the content of formic acid is 25ppm, and the content of w...

Embodiment 3

[0027] (1) Send the extracted mixture of paraformaldehyde, benzene, a small amount of water and organic matter into the light removal tower, and carry out the process under the conditions of tower bottom temperature 118°C, tower top temperature 78°C, reflux ratio 1, and pressure 0.1Kpa. Light removal, the top gas of the light removal tower returns to the extraction process after being condensed and cooled.

[0028] (2) The mixture of paraformaldehyde and trace amounts of water, methanol, formaldehyde, formic acid, etc. at the bottom of the tower after light removal is sent to the stripping tower. The stripping tower uses nitrogen as the stripping medium. The stripping is carried out under the conditions of temperature 114°C and pressure 0.1Kpa.

[0029] After detection and analysis, the content of paraformaldehyde in the bottom of the stripping tower is 99.95%, the content of methanol is 115ppm, the content of formaldehyde is 128ppm, the content of formic acid is 56ppm, and th...

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Abstract

The invention discloses a method and a device for removing light components in trioxymethylene, which belong to the technical field of purification of trioxymethylene. The method includes the following steps of firstly, feeding extracted trioxymethylene, benzene and small amount of mixture of water and organic matter into a light component removing tower to remove light components, returning to extraction process after gas on the top of the light component removing tower is condensed and cooled; and secondly; feeding trioxymethylene at the bottom of the light component removing tower and small amount of mixture of water, methyl alcohol, formaldehyde, formic acid and the like to be stripped in a stripper. By adding the stripper, temperature at the bottom of the light component removing tower and backflow ratio can be reduced by the additional stripping process, energy consumption is reduced greatly, trioxymethylene can be prevented from being decomposed greatly, and purity of trioxymethylene can be improved effectively.

Description

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Claims

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Application Information

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Owner XINGTAI RISUN COAL CHEM IND
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