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Novel preparation method for mono ethanol diisopropanolamine

A technology of ethanoldiisopropanolamine and ethanolamine, which is applied in the preparation of organic compounds, chemical instruments and methods, preparation of aminohydroxy compounds, etc., can solve the problems of complex preparation process, low yield and high cost, and achieves easy operation, The effect of high yield and low production cost

Active Publication Date: 2013-12-11
UNIV OF JINAN
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing method for preparing monoethanol diisopropanolamine has def

Method used

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  • Novel preparation method for mono ethanol diisopropanolamine

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Add 24.4g ethanolamine, 0.021g quality regulator, 9.3g propylene oxide in the 125ml four-neck bottle equipped with mechanical stirring device, circulating condensing device, thermometer, pear-shaped separating funnel, stir evenly, and the temperature to be reacted is at 50~ Between 60°C, turn on the circulating condensing device, drop 37.2g of propylene oxide into the four-necked bottle through the separatory funnel, control the temperature in the reaction bottle at 50~60°C, and keep warm for 1.5 h to obtain the finished product of monoethanol diisopropanolamine. Sampling was carried out for gas chromatographic analysis, and the yield was 97.6%.

Embodiment 2

[0015] Add 24.4g of ethanolamine, 0.042g of quality regulator, and 9.3g of propylene oxide into a 125ml four-necked bottle equipped with a mechanical stirring device, a circulating condensing device, a thermometer, and a pear-shaped separating funnel, and stir evenly until the reaction temperature is 50~ Between 60°C, turn on the circulating condensing device, drop 37.2g of propylene oxide into the four-necked bottle through the separatory funnel, control the temperature in the reaction bottle at 50~60°C, and keep warm for 1.5 h to obtain the finished product of monoethanol diisopropanolamine. Sampling was carried out for gas chromatographic analysis, and the yield was 95.2%.

Embodiment 3

[0017] Add 24.4g ethanolamine, 0.021g quality regulator, 11.6g propylene oxide in the 125ml four-necked bottle equipped with mechanical stirring device, circulating condensing device, thermometer, and pear-shaped separating funnel, stir evenly, and wait for the reaction temperature to be at 50~ Between 60°C, turn on the circulating condensing device, drop 34.9g of propylene oxide into the four-necked bottle through the separatory funnel, control the temperature in the reaction bottle at 50~60°C, and keep warm for 1.5 h to obtain the finished product of monoethanol diisopropanolamine. Sampling was carried out for gas chromatographic analysis, and the yield was 98.3%.

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Abstract

A novel preparation method for mono ethanol diisopropanolamine comprises the following steps: weighing ethanolamine, epoxy propane and mass modifier (quinones) according to design proportion; adding ethanolamine and mass modifier, as well as certain amount of epoxy propane, into a reactor with a strong mixing device; mixing uniformly without a heat source; when the reaction temperature reaches a certain value, opening a circulation condensing unit, and adding dropwise the residual epoxy propane; controlling the reaction temperature at 40-80 DEG C, mixing during the reaction for 1-4 h, and obtaining the product mono ethanol diisopropanolamine, wherein the molar ratio of ethanolamine and epoxy propane is (0.5-1.5):(1.5-2.5), the amount of the mass modifier is 0.01%-0.015% of the total mass of ethanolamine and epoxy propane. The method is simple in technology, low in manufacturing cost, high in productivity, and suitable for industrial production.

Description

technical field [0001] The invention relates to a novel preparation method of monoethanol diisopropanolamine (EDIPA), which belongs to the field of organic synthesis. Background technique [0002] Alcohol amines are an important class of organic compounds. Due to their unique structure and charge distribution, they are usually used as surface active substances and are widely used in various fields such as chemical raw materials, dyes, medicines, and building materials. The existing methods for preparing monoethanol diisopropanolamine have defects such as complex preparation process, high cost, and low yield. Contents of the invention [0003] The invention provides a method for synthesizing monoethanol diisopropanolamine with simple preparation process, low cost and high product yield. [0004] The technical scheme that the present invention solves its technical problem adopts is: a kind of preparation method of monoethanol diisopropanolamine comprises the following steps...

Claims

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Application Information

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IPC IPC(8): C07C213/04C07C215/12
Inventor 叶正茂卢晓磊
Owner UNIV OF JINAN
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