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Tri-n-butylamine recycling method and recycling device used thereby

A technology of tri-n-butylamine and recovery device, applied in separation methods, chemical instruments and methods, distillation separation and other directions

Active Publication Date: 2017-05-31
ZHEJIANG JIANYE CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain high-purity (mass percentage greater than 99.5%) tri-n-butylamine, the tri-n-butylamine reaction solution must be sequentially passed through the removal of n-butylamine tower, the removal of di-n-butylamine tower, the light removal tower, and finally the light removal tower. The liquid is the tri-n-butylamine product with a mass percentage greater than 99.5%, and the mass percentage of tri-n-butylamine in the overhead liquid of the stripping tower is 90-97%, which shows that the content of tri-n-butylamine is relatively high. The distillate is not effectively treated, and part of the distillate is degraded and used as an extraction agent, and the other part is stored in the waste tank

Method used

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  • Tri-n-butylamine recycling method and recycling device used thereby
  • Tri-n-butylamine recycling method and recycling device used thereby
  • Tri-n-butylamine recycling method and recycling device used thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, a kind of tri-n-butylamine recovery method,

[0022] At the beginning, the overhead distillate of the tri-n-butylamine light removal tower is used as a raw material, and the subsequent mixture of the tower overhead liquid of the tri-n-butylamine light removal tower and the bottom liquid of the molecular distillation tower 2 is used as a mixed raw material ; The volume ratio of the overhead distillate of the tri-n-butylamine lightening tower and the bottom liquid of the molecular distillation tower 2 in the mixed raw material is 2:1;

[0023] Raw material / mixed raw material enters rectification tower 1 from the feed port of rectification tower 1 and carries out rectification, and the tower bottom liquid that rectification tower 1 bottom obtains is tri-n-butylamine (mass fraction is greater than 99.5%), and this tri-n-butylamine Discharge from the tower bottom liquid outlet of rectifying tower 1;

[0024] The overhead distillate of rectifying tower 1 enters...

Embodiment 2

[0027] Embodiment 2, a kind of tri-n-butylamine recovery method,

[0028] The volume ratio of the overhead distillate of the tri-n-butylamine delightening tower and the bottom liquid of the molecular distillation tower 2 in the mixed raw material is 1:1;

[0029] The top pressure of rectification column 1 is 9kPa, the temperature at the bottom of the column is 98°C, and the reflux ratio is 5:1;

[0030] The tower top pressure of molecular distillation tower 2 is 50Pa, and the temperature in tower is controlled at 70 ℃;

[0031] The rest are equal to Example 1.

Embodiment 3

[0032] Embodiment 3, a kind of tri-n-butylamine recovery method,

[0033] The volume ratio of the overhead distillate of the tri-n-butylamine delightening tower and the bottom liquid of the molecular distillation tower 2 in the mixed raw material is 5:1;

[0034] The top pressure of rectification column 1 is 10kPa, the bottom temperature is 100°C, and the reflux ratio is 5:1;

[0035] The tower top pressure of molecular distillation tower 2 is 100Pa, and the temperature in tower is controlled at 75 ℃;

[0036] The rest are equal to Example 1.

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Abstract

The invention discloses a tri-n-butylamine recycling device and a tri-n-butylamine recycling method implemented by using the recycling device. The method is as follows: taking tower top distillate of a tri-n-butylamine light-component removing tower as a raw material at the starting time, and the tower top distillate of the tri-n-butylamine light-component removing tower and tower kettle liquid of a molecular distillation tower are mixed to serve as a mixed raw material at the subsequent time; the volume ratio of the tower top distillate of the tri-n-butylamine light-component removing tower to the tower kettle liquid of the molecular distillation tower in the mixed raw material is (1-5):1; the raw material / mixed raw material enters a rectifying tower from a feeding port of the rectifying tower to perform rectification, and tower kettle liquid obtained from the bottom of the rectifying tower is tri-n-butylamine; tower top distillate of the rectifying tower enters the molecular distillation tower from a feeding port of the molecular distillation tower to perform molecular distillation; and residual liquid is obtained from the top of the molecular distillation tower, and the tower kettle liquid of the distillation tower is obtained from the bottom of the molecular distillation tower.

Description

technical field [0001] The invention belongs to the field of vacuum batch rectification, and in particular relates to a process for purifying and recovering the overhead liquid of a tri-n-butylamine light removal tower. Background technique [0002] Tri-n-butylamine, whose molecular formula is C 12 h 27 N, CAS number: 102-82-9, molecular weight 185.35, boiling point 216.0-217.0°C under normal pressure. Tri-n-butylamine is a colorless or light yellow liquid at normal temperature and pressure. It has a special odor and is weakly alkaline. It is easily soluble in ethanol, ether, etc., and slightly soluble in water. It has a wide range of industrial uses, is an important organic chemical intermediate, and is also an excellent reagent, emulsifier, extractant, insecticide and preservative. [0003] The main production process of tri-n-butylamine, such as figure 1 As shown, after vaporizing n-butylamine and di-n-butylamine in the fixed-bed reactor (the function of the vaporizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/84C07C211/07B01D3/14B01D3/32B01D3/12B01D3/42
CPCB01D3/12B01D3/14B01D3/32B01D3/4216B01D3/4283C07C209/84C07C211/07
Inventor 沈剑陈云斌郑丰平张建明周国权王爱艳
Owner ZHEJIANG JIANYE CHEM
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