Octadecanamide surfactant and synthetic method

A technology of stearic acid amide and surfactant, applied in the field of surfactant and its preparation, can solve the problems of small variety and quantity, etc.

Active Publication Date: 2008-09-03
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since the 1970s, domestic research on amphoteric surfactants has been carried out. At present, a small number of products have been put into the market, but the varieties and quantities are not many. Therefore, my country is still in its infancy in the research and application of amphoteric surfactants.

Method used

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  • Octadecanamide surfactant and synthetic method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In the four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add stearic acid 174.2g (0.6mol) and hydroxyethylethylenediamine (molar ratio is 1: 1) and start heating and stirring, slowly The reaction temperature was raised to 100°C, and the vacuum pump was turned on to adjust the vacuum degree of the reaction system until the water came out, and the reaction temperature was gradually raised to 150°C within 3 hours until the water came out completely. Heating is stopped and the temperature is lowered to obtain the stearic acid amide surfactant intermediate.

[0027] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 22.3g (0.06mol) of stearic acid amide surfactant intermediate, heat and stir, at a temperature of 50-90°C, for 4 hours Chloroacetic acid solution was added dropwise at low temperature, and then NaOH solution was added dropwise at elevated temperature. Stearic acid amide ...

Embodiment 2

[0029] In the four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add stearic acid 174.2g (0.6mol) and hydroxyethylethylenediamine (molar ratio is 1: 1.1) and start heating and stirring, slowly The reaction temperature was raised to 110° C., and the vacuum pump was turned on to adjust the vacuum degree of the reaction system until the water came out. The reaction temperature was gradually raised to 150° C. within 4 hours until the water came out completely. Heating is stopped and the temperature is lowered to obtain the stearic acid amide surfactant intermediate.

[0030] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 22.3g (0.06mol) of stearic acid amide surfactant intermediate, heat and stir, at a temperature of 50-90°C, for 4 hours Chloroacetic acid solution was added dropwise at low temperature, and then NaOH solution was added dropwise at elevated temperature. Stearic acid amid...

Embodiment 3

[0032] In the four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add stearic acid 174.2g (0.6mol) and hydroxyethylethylenediamine (molar ratio is 1: 1.2) and start heating and stirring, slowly The reaction temperature was raised to 100°C, and the vacuum pump was turned on to adjust the vacuum degree of the reaction system until the water came out, and the reaction temperature was gradually raised to 150°C within 5 hours until the water came out completely. Heating is stopped and the temperature is lowered to obtain the stearic acid amide surfactant intermediate.

[0033] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 22.3g (0.06mol) of stearic acid amide surfactant intermediate, heat and stir, at a temperature of 50-90°C, for 4 hours Chloroacetic acid solution was added dropwise at low temperature, and then NaOH solution was added dropwise at elevated temperature. Stearic acid amid...

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Abstract

An octadecanamide surfactant and a synthetic method are provided. The inventive octadecanamide surfactant has the structural formula mentioned as above. The synthetic method includes the following steps: synthesizing the octadecanamide surfactant intermediate by using stearic acid and hydroxyethylethylene diamine as raw materials, and then performing amphoteric reaction by 'chloroacetic acid process' to obtain the octadecanamide surfactant. Based on the prior art, the invention utilizes stearic acid, hydroxyethylethylene diamine and chloroacetic acid as raw materials, to directly synthesize amide surfactants by a novel vacuum-amphoteric method without ring closing reaction. The inventive octadecanamide surfactant has low foaming and wetting performance and is widely used as a monomer of a textile finish agent.

Description

【Technical field】: [0001] The invention belongs to the technical field of surfactants and their preparation. 【Background technique】: [0002] The stearic acid amide surfactant involved in the present invention is a novel surfactant, and its performance is comparable to that of the carboxylic acid type imidazoline amphoteric surfactant. [0003] Aliphatic hydrocarbon-based imidazoline amphoteric surfactants have excellent cleaning, wetting, foaming and dispersing properties [1，2] , very low irritation [3] , low toxicity or non-toxic [4] , antistatic [5] , antibacterial [6] , friendly to the environment. [0004] Amphoteric surfactants are classified according to their structures: (1) imidazoline amphoteric surfactants (2) betaine amphoteric surfactants (3) amino acid surfactants (4) lecithin surfactants. Among them, the lecithin surfactant is a natural surfactant, and the rest are artificially synthesized [7] . [0005] Amphoteric surfactants are a late-developed clas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/22C09K23/22
Inventor 李平郭建龙李栋
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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