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Triethanolamine production method

A technology of triethanolamine and its production method, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of high energy consumption and unfavorable economic benefits of triethanolamine, so as to improve purity, increase production efficiency, and improve The effect of economic benefits

Inactive Publication Date: 2018-03-06
NINGBO YUANLI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although, the triethanolamine with higher purity can be obtained in this way, but the boiling point of triethanolamine is about 360°C, so a large amount of energy is often needed in the distillation process, which is not conducive to improving the economic benefits of triethanolamine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1. Add 603Kg of diethanolamine, 40.6Kg of water and 4.2Kg of glacial acetic acid into the reactor, and turn on the stirring paddle to stir the material, and the rotating speed of the stirring paddle is controlled at 500rpm for 15min;

[0037] In step 2, nitrogen is introduced into the reactor, and the interior of the reactor is replaced three times, and the air in the reactor is evacuated;

[0038] Step 3, slowly add 240Kg of ethylene oxide to the reaction kettle, and keep the original rotating speed for stirring, the time of adding ethylene oxide is controlled to be 4.5h, and the reaction kettle is heated to 30 in 30min from the start of adding ethylene oxide. °C;

[0039] Step 4. After the ethylene oxide is added, the reaction kettle is heated to 60° C., and the reaction is kept for 30 minutes, and the pressure is controlled at 0.2 Mpa, to finally obtain the finished product of triethanolamine.

[0040] Wherein, the acid used here can also be various acids that ...

Embodiment 2

[0042] Step 1, adding 603Kg of diethanolamine, 40.0Kg of water, and 13.0Kg of concentrated sulfuric acid into the reaction kettle, and turning on the stirring paddle to stir the material, the rotating speed of the stirring paddle is controlled at 500rpm, and the time is 15min;

[0043] In step 2, nitrogen is introduced into the reactor, and the interior of the reactor is replaced three times, and the air in the reactor is evacuated;

[0044] Step 3, slowly add 265Kg of ethylene oxide to the reaction kettle, and keep the original rotating speed for stirring, the time of adding ethylene oxide is controlled to be 5.5h, and the reaction kettle is heated to 80°C within 30min from the start of adding ethylene oxide. °C;

[0045] Step 4: After the ethylene oxide is added, the reaction is kept for 30 minutes and the pressure is controlled at 0.4Mpa to finally obtain the finished product of triethanolamine.

Embodiment 3

[0047] Step 1, adding 603Kg of diethanolamine, 40.3Kg of water, 4.3Kg of glacial acetic acid and 4.3 of concentrated sulfuric acid into the reaction kettle, and turning on the stirring paddle to stir the material, the rotating speed of the stirring paddle is controlled at 500rpm, and the time is 15min;

[0048] In step 2, nitrogen is introduced into the reactor, and the interior of the reactor is replaced three times, and the air in the reactor is evacuated;

[0049] Step 3. Slowly add 253Kg of ethylene oxide to the reaction kettle, and keep the original rotating speed for stirring. The time for adding ethylene oxide is controlled to be 5h, and the reaction kettle is heated to 60° C. within 30 minutes after the addition of ethylene oxide. ;

[0050]Step 4: After the ethylene oxide is added, the reaction kettle is heated to 80° C., and the reaction is kept for 30 minutes, and the pressure is controlled at 0.3 Mpa, to finally obtain the finished product of triethanolamine.

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Abstract

The invention discloses a triethanolamine production method which comprises the following steps of S1, adding diethanolamine, water and acid in a reaction kettle, and starting a stirring paddle to uniformly mixing various materials; S2, adding ethylene oxide in a state of room temperature, and then gradually raising the temperature to 30-80 DEG C for reaction; and S3, after addition of the ethylene oxide, performing thermal insulation reaction for 30min to obtain a finished triethanolamine product. By adopting the triethanolamine production method, purification by rectification is not needed,energy waste is reduced, and the triethanolamine with higher purity can be obtained at the same time, so that the economic benefit of the triethanolamine is greatly increased. In addition, the triethanolamine production method also very accords with a green chemical concept and thus is also liable to popularize in a large range.

Description

technical field [0001] The invention relates to the field of chemical production, in particular to a production scheme of triethanolamine. Background technique [0002] Triethanolamine, ie tris(2-hydroxyethyl)amine, can be seen as the trihydroxyl substitution of triethylamine. It itself and its salt solution are used as engineering admixtures and early strength agents (0.1% of the total mass) in the cement clinker grinding process, which can not only prevent the aggregation of particles and air cushion during the grinding process, but also improve the fluidity and packing density of cement. , and can also reduce the power consumption of the pulverizer. [0003] In addition, with the rapid development of the construction industry in the country in recent years, it has also driven the development of the national cement industry. And since 2008, the cement output of cement enterprises above designated size in the country has exceeded 1.388 billion tons, and the amount of ceme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C213/04C07C215/12
CPCC07C213/04C07C215/12
Inventor 张远军邓勇林贾斌谭富兵姚江
Owner NINGBO YUANLI CHEM
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