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Method for synthesizing diethanol amide

A technology of fatty acid diethanolamide and diethanolamide, which is applied in the preparation of carboxylic acid amide, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of few applications, and achieve simple process, mild reaction conditions and simple equipment Effect

Inactive Publication Date: 2012-10-03
科凯精细化工(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the application effect in tertiary oil recovery is also very good, and can reach the ultra-low interfacial tension of 1OmN / m, but the application in the oil field is still relatively small, and now many people at home and abroad are conducting research in this area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 720 parts of coconut oil fatty acid methyl ester and 330 parts of ethanolamine in proportion to the reaction kettle, add 8.5 parts of sodium methoxide under stirring, seal the reaction kettle, change the temperature slowly to 115°C, the vacuum degree is 0.05MPa, and the reaction time is 4 hours . The distilled methanol can be used to produce fatty acid methyl esters after being refined and purified in subsequent processes. Resource saving and zero waste discharge. In the coconut oil fatty acid diethanolamide obtained by the synthesis reaction, the amide content is greater than 92%, the free amine content is less than 5%, and the free fatty acid content is less than 1%.

Embodiment 2

[0019] Add 705 parts of palm kernel oil fatty acid methyl ester and 330 parts of ethanolamine in proportion to the reaction kettle, add 9.5 parts of sodium methoxide under stirring, seal the reaction kettle, change the temperature slowly to 120°C, the vacuum degree is 0.03MPa, and the reaction time is 2 hours . The distilled methanol can be used to produce fatty acid methyl esters after being refined and purified in subsequent processes. Resource saving and zero waste discharge. In the palm kernel oil fatty acid diethanolamide obtained by the synthesis reaction, the amide content is greater than 94%, the free amine content is less than 5%, and the free fatty acid content is less than 1%.

Embodiment 3

[0021] Add 705 parts of palm oil fatty acid methyl ester and 320 parts of ethanolamine in proportion to the reaction kettle, add 9.2 parts of sodium methoxide under stirring, seal the reaction kettle, change the temperature slowly to 100°C, the vacuum degree is 0.04MPa, and the reaction time is 3 hours. The distilled methanol can be used to produce fatty acid methyl esters after being refined and purified in subsequent processes. Resource saving and zero waste discharge. In the palm kernel oil fatty acid diethanolamide obtained by the synthesis reaction, the amide content is greater than 93%, the free amine content is less than 5%, and the free fatty acid content is less than 1%.

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PUM

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Abstract

The invention discloses a method for synthesizing diethanol amide and belongs to the technical field of synthesis of amides compounds in organic chemistry. According to the method, fatty acid methyl ester and diethanol amine which are used as raw materials are subjected to amidation under the action of catalyst to form diethanol amide, wherein the molar ratio of fatty acid methyl ester to diethanol amine is 1:(1.0-1.1), the catalyst is sodium methoxide or potassium hydroxide, and the adding amount of the catalyst is 0.5 to 1.0 percent based on the total mass of fatty acid methyl ester and diethanol amine. According to the method, diethanol amide of which the molar ratio of fatty acid methyl ester to diethanol amine is 1:1 can be synthesized by a one-step method; and the process is simple, and materials are low in cost.

Description

technical field [0001] The invention describes a method for synthesizing fatty acid diethanolamide, which belongs to the technical field of synthesis of amide compounds in organic chemistry. Background technique [0002] The general formula of fatty acid diethanolamide is RCON(CH 2 -CH 2 Oh) 2 , Pale yellow liquid, non-toxic, non-irritating, the solubility decreases with the increase of the number of carbon atoms, and increases with the increase of temperature. Alkanolamides with better water solubility can be prepared by changing the molar ratio of methyl ester to diethanolamine. [0003] Alkanolamides have good surface activity and are one of the most important varieties of nonionic surfactants. They are important active monomers in modern synthetic detergents and are widely used in detergents, foam stabilizers, thickeners, Softener, antirust agent, antistatic agent, etc. Moreover, the application effect in tertiary oil recovery is also very good, and can reach the ul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C233/18C07C231/02
Inventor 顾永欢樊小景胡仲飞吴爱花
Owner 科凯精细化工(上海)有限公司
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