Synthesizing process of fatty diglycollic amide

A technology of fatty acid diethanolamide and diethanolamine, 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 complicated process operation and cumbersome preparation process of fatty acid methyl ester, and achieve simple process, Equipment investment and energy saving, the effect of simple equipment

Inactive Publication Date: 2007-07-18
王伟松
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The other is the reaction of fatty acid methyl ester and diethanolamine under reduced pressure. The purity of fatty acid diethanolamide in the product obtained is relatively high, but the process operation is complicated, and methanol with high toxicity is used, and the preparation process of fatty acid methyl ester also more cumbersome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 300 parts of coconut oil fatty acid and 61 parts of diethanolamine into the reaction kettle, vacuumize and heat until the temperature is 120-160°C, vacuum degree is 0.090-0.097MPa, and the dehydration condensation reaction is kept for 3-5 hours. Then cool to 80-100°C, add 106 parts of diethanolamine and 5 parts of potassium fluoride, and keep stirring for 3-4 hours. Finally, add 10 parts of activated clay, heat-preserve and stir for 1-2 hours, and filter while hot to obtain 1:1 coconut oil fatty acid diethanolamide.

Embodiment 2

[0020] Add 300 parts of coconut oil fatty acid and 67 parts of diethanolamine into the reaction kettle, vacuumize and heat until the temperature is 120-160°C, the vacuum degree is 0.090-0.097MPa, and the heat preservation dehydration condensation reaction is 3-5h. Then cool to 80-100°C, add 101 parts of diethanolamine and 5 parts of potassium fluoride, and keep stirring for 3-4 hours. Finally, add 10 parts of activated clay, heat-preserve and stir for 1-2 hours, and filter while hot to obtain 1:1 coconut oil fatty acid diethanolamide.

Embodiment 3

[0022] Add 300 parts of coconut oil fatty acid and 83.5 parts of diethanolamine into the reaction kettle, vacuumize and heat to a temperature of 120-160°C and a vacuum degree of 0.090-0.097 MPa, and keep warm for 3-5 hours for dehydration and condensation. Then cool to 80-100°C, add 83.5 parts of diethanolamine and 5 parts of potassium fluoride, and keep stirring for 3-4 hours. Finally, add 10 parts of activated clay, heat-preserve and stir for 1-2 hours, and filter while hot to obtain 1:1 coconut oil fatty acid diethanolamide.

[0023] For the above three examples, under the constant situation of the total amount of diethanolamine, due to the difference in the amount of diethanolamine added respectively twice, the purity of the 1: 1 type coconut oil fatty acid diethanolamide in the resulting product is changed from Example 1 In Example 3, it decreased successively, being 94.4%, 850%, and 72.3% respectively.

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PUM

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Abstract

This invention relates to a synthesis method of fatty acids diethanolamine. It takes fatty acid and diethanolamine as raw materials. The method includes follow steps: first fatty acids and a certain amount of diethanolamine for dehydration and condensation reaction, then adding the remaining diethanolamine and alkaline catalyst for aminolysis reaction, the final using activated clay for adsorption treatment, and through filtration to obtain fatty acid diethanolamine. The weight proportion between fatty acids and diethanolamine is 1:0.5 ~ 0.6; account for weight, 30 ~ 70% diethanolamine add in dehydration and condensation reaction, and the remaining add in aminolysis reaction; its alkaline catalyst is one of the alkali metal hydroxide, potassium fluoride and sodium borohydride, account for 0.3 to 2.0% of total weight of fatty and diethanolamine.

Description

technical field [0001] The invention relates to a method for synthesizing fatty acid diethanolamide, which belongs to the technical field of synthesis of amide compounds in organic chemistry. Background technique [0002] Fatty acid diethanolamide is a kind of nonionic surfactant with wide application. Compared with other non-ionic surfactants, it has the following four characteristics: strong degreasing property; excellent foam stabilizing property; property of thickening aqueous solution; strong adsorption to fibers, hand feeling after washing Well, it has a certain antistatic effect. Therefore, fatty acid diethanolamide is widely used in cleaning products and various industrial fields. It is indispensable for various personal hygiene products such as light-duty liquid detergents, shampoos, dish detergents, shaving creams, and facial cleansers. active ingredient. It can be used as a foam stabilizer with good emulsifying properties, and can be used to prepare various det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C237/08C07C231/02
Inventor 王伟松王新荣孟照平李富强
Owner 王伟松
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