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Method for preparing oleic acid Gemini surfactant

A surfactant and oleic acid technology, which is applied in the field of preparation of oleic acid-based Gemini surfactants, can solve the problems of complex synthesis steps, difficulty in large-scale industrial production, high production costs, application and marketing promotion, etc.

Inactive Publication Date: 2015-04-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance of Gemini type surfactant is excellent, its synthetic steps are complicated, and raw material price is expensive, (Zhang Q., Gao Z. N., Xu F., etc.. Surface Tension and Aggregation Properties of Novel Cationic Gemini Surfactants with Diethylammonium Headgroups and a Diamido Spacer. Langmuir. 2012, 28, 11979-11987; David A., Jaeger, Wang Y. P., etc.. Pyrophosphate-Based Gemini Surfactant. 2002, (18):9259-9266.) Higher production costs make it widely used in the market The promotion has been limited to a certain extent, and it is difficult to realize large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1, take 29 parts by mass of oleic acid monoethanolamide, dissolve it in 40ml of tetrahydrofuran, diethyl ether and acetonitrile in a mixed solvent of equal molar ratio and add it to a three-necked flask, and then add 18 parts of trichlorohydrin Oxon, 5 parts of triethylamine, 6 parts of ethylene glycol, 30 parts of hexadecyl dimethyl tertiary amine, the temperature was strictly controlled at 0°C and the reaction was stirred for 4h. The temperature was raised to 65° C., and the reaction was continued for 12 hours to obtain an oleic acid-based Gemini surfactant.

Embodiment 2

[0009] Example 2, take 30 parts by mass of oleic acid monoethanolamide, dissolve it in 40ml of tetrahydrofuran, diethyl ether and acetonitrile in a mixed solvent with an equimolar ratio and add it to a three-necked flask. Under nitrogen protection, add 20 parts of trichloro Oxon, 5 parts of triethylamine, 5 parts of ethylene glycol, 28 parts of hexadecyl dimethyl tertiary amine, the temperature was strictly controlled at 0°C and the reaction was stirred for 4h. The temperature was raised to 65°C, and the reaction was continued for 48 hours to obtain the oleic acid-based Gemini surfactant.

Embodiment 3

[0010] Example 3, take 36 parts by mass of oleic acid monoethanolamide, dissolve it in 40ml of tetrahydrofuran, diethyl ether and acetonitrile in a mixed solvent with an equimolar ratio and add it to a three-necked flask, and then add 20 parts of trichlorohydrin Oxon, 7 parts of triethylamine, 6 parts of ethylene glycol, 34 parts of hexadecyl dimethyl tertiary amine, the temperature was strictly controlled at 0°C and the reaction was stirred for 4h. The temperature was raised to 65°C, and the reaction was continued for 72 hours to obtain the oleic acid-based Gemini surfactant.

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PUM

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Abstract

The invention relates to a preparation method of an oleic acid-based Gemini surfactant. The existing Gemini-type surfactants have excellent properties, but their synthesis steps are complicated and the raw materials are expensive. The present invention takes 29-36 parts by mass of oleic acid monoethanolamide, dissolves it in 40ml of tetrahydrofuran, diethyl ether and acetonitrile in a mixed solvent with an equal molar ratio and adds it into a three-necked flask, and then adds 16-22 parts of Phosphorus oxychloride, 5-7 parts of triethylamine, 5-7 parts of ethylene glycol, 28-38 parts of cetyl dimethyl tertiary amine, strictly control the temperature at 0°C and stir for 4 hours. Raise the temperature to 65°C and continue the reaction for 12-72 hours to obtain the oleic acid-based Gemini surfactant . Should The surfactant prepared by the method not only has the excellent properties of the traditional Gemini surfactant, but also has good market applicability because of its simple preparation process and cheap raw materials.

Description

technical field [0001] The invention relates to a preparation method of an oleic acid-based Gemini surfactant, in particular to a preparation method of an oleic acid-based Gemini surfactant based on natural oil. Background technique [0002] Surfactants are widely used in the chemical industry and are called "industrial monosodium glutamate". In recent decades, people have been exploring the synthesis of new surfactants with high surface activity. Gemini surfactant is a new type of surfactant. Its unique molecular structure and excellent performance have aroused people's research upsurge (Du Danhua, Wang Quanjie. Research progress and application of Gemini surfactant. Leather and Chemical Industry, 2011, 27 (1): 18.). Compared with traditional surfactants, Gemini surfactants contain at least two hydrophilic groups and two lipophilic groups in their molecules. This unique structural feature endows Gemini surfactants with properties unmatched by general surfactants. (Menger...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/14C07F9/09C09K23/14
Inventor 马建中高建静吕斌范倩倩
Owner SHAANXI UNIV OF SCI & TECH