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A kind of method of producing diethanol monoisopropanolamine

A technology of monoisopropanolamine and diethanolamine, applied in the field of chemical building materials, can solve the problems of restricting the application field of diethanol monoisopropanolamine, affecting product appearance and commercial value, and high color of diethanol monoisopropanolamine , to achieve the effects of low cost, reduced chroma, and convenient preparation

Active Publication Date: 2018-07-03
安徽海螺材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has no effect on the performance of cement grinding aids, when it is applied to the surfactant industry, it will affect the color of the final product, affect the appearance and commercial value of the product
[0004] Therefore, there is a problem in the prior art that the chroma of diethanol monoisopropanolamine is high when the content of propylene oxide aldehyde is high, which limits the application field of diethanol monoisopropanolamine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: a kind of method of producing diethanol monoisopropanolamine, it may further comprise the steps:

[0019] S1. Add diethanolamine and ammonia to the reaction vessel, stir evenly, and heat up to 40°C; the mass percentage of the ammonia is 0.01%; the mass percentage of the propylene oxide is 98.00%;

[0020] S2. Continuously add propylene oxide to the reaction vessel, the mass percentage of aldehyde in the propylene oxide is 0.05%, the molar ratio of diethanolamine to propylene oxide is 1:0.95, the molar ratio of aldehyde in ammonia to propylene oxide is 0.05%. The ratio is 1:1, the reaction temperature is controlled at 50°C, and the pressure is 0.1MPa. After the reaction is complete, diethanol monoisopropanolamine with a color of 45 black is obtained.

Embodiment 2

[0021] Embodiment 2: a kind of method of producing diethanol monoisopropanolamine, it may further comprise the steps:

[0022] S1. Add diethanolamine and ammonia into the reaction vessel, stir evenly, and heat up to 60°C; the mass percentage of the ammonia is 99.99%; the mass percentage of the propylene oxide is 99.95%;

[0023] S2. Continuously add propylene oxide to the reaction vessel, the mass percentage of aldehyde in the propylene oxide is 0.10%, the mol ratio of diethanolamine and propylene oxide is 1: 1.05, the mol ratio of aldehyde in ammonia and propylene oxide is 0.10%. The ratio is 100:1, the reaction temperature is controlled at 95° C., and the pressure is 0.5 MPa. After the reaction is complete, diethanol monoisopropanolamine with a color of 40 black is obtained.

Embodiment 3

[0024] Embodiment 3: a kind of method of producing diethanol monoisopropanolamine, it may further comprise the steps:

[0025] S1. Add diethanolamine and ammonia into the reaction vessel, stir evenly, and heat up to 45°C; the mass percentage of the ammonia is 10.00%; the mass percentage of the propylene oxide is 98.90%;

[0026] S2. Continuously add propylene oxide to the reaction vessel, the mass percentage of aldehyde in the propylene oxide is 0.08%, the molar ratio of diethanolamine to propylene oxide is 1:1, and the molar ratio of aldehyde in ammonia to propylene oxide is 0.08%. The ratio is 38:1, the reaction temperature is controlled at 65°C, and the pressure is 0.2MPa. After the reaction is complete, diethanol monoisopropanolamine with a color of 34 black is obtained.

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PUM

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Abstract

The invention discloses a method for producing low-chroma diethanolisopropanolamine. The method comprises the following steps: 1, adding diethanolamine and ammonia to a reaction container, uniformly stirring diethanolamine and ammonia, and heating the obtained mixture to 40-60 DEG C; and 2, continuously adding epoxypropane to the reaction container, and completely carrying out a reaction at a controlled reaction temperature under a controlled pressure in order to obtain the low-chroma diethanolisopropanolamine. The slightly high aldehyde content of epoxypropane causes the slightly high chroma of diethanolisopropanolamine, and ammonia added to diethanolamine makes formaldehyde, acetaldehyde, propionaldehyde and other aldehydes in the epoxypropane preferably react with ammonia, so formation of chromogenic substances is avoided, thereby the preparation method can be used for producing low-chroma diethanolisopropanolamine from epoxypropane with the aldehyde content exceeding standards. The preparation method has the advantages of simplicity in operation, convenience in preparation, low cost, effective reduction of the chroma of diethanolisopropanolamine, and suitableness for industrial large-scale production.

Description

technical field [0001] The invention belongs to the field of chemical building materials, and in particular relates to a method for producing diethanol monoisopropanolamine. Background technique [0002] The important application field of diethanol monoisopropanolamine is cement grinding aid, which has become the key raw material of cement grinding aid because of its excellent grinding aid and strengthening effect, and is gradually replacing traditional triethanolamine and triisopropanolamine. At the same time, because the molecular structure of diethanol monoisopropanolamine is similar to that of triethanolamine and triisopropanolamine, it can be used as a raw material for surfactants in soaps, detergents, dispersants, emulsifiers, etc., and its HLB The value is in the middle of triethanolamine and triisopropanolamine, and its performance is much better than that of triethanolamine and triisopropanolamine in some applications. It can be predicted that its market prospect is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C215/12C07C213/04
CPCC07C213/04C07C215/12
Inventor 曾君张大康明金龙吴建越张超
Owner 安徽海螺材料科技股份有限公司