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Hexadecoic acid acidamide surfactant and synthetic method

A surfactant, hexadecanoic acid amide technology, applied in chemical instruments and methods, dissolution, chemical/physical process, etc., can solve the problem of small variety and quantity, and achieve the effect of low irritation and good compatibility

Inactive 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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  • Hexadecoic acid acidamide 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 palmitic acid 153.6g (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 palmitic acid amide surfactant intermediate.

[0027] In a four-neck flask equipped with stirring, a thermometer, a reflux condenser and a dropping funnel, add 20.6 g (0.06 mol) of palmitic 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, palmit...

Embodiment 2

[0029] In the four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add palmitic acid 153.6g (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 palmitic acid amide surfactant intermediate.

[0030] In a four-neck flask equipped with stirring, a thermometer, a reflux condenser and a dropping funnel, add 20.6 g (0.06 mol) of palmitic 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, palm...

Embodiment 3

[0032] In the four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add palmitic acid 153.6g (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 palmitic acid amide surfactant intermediate.

[0033] In a four-neck flask equipped with stirring, a thermometer, a reflux condenser and a dropping funnel, add 20.6 g (0.06 mol) of palmitic 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, palm...

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Abstract

A hexadecanamide surfactant and a synthetic method are provided. The inventive hexadecanamide surfactant has the structural formula as above. The synthetic method includes: synthesizing an amide surfactant directly from hexadecanoic acid, hydroxyethylethylene diamine and chloroacetic acid as raw materials, by a novel vacuum-amphoteric method without ring closing reaction. The method includes the following steps: synthesizing a hexadecanamide surfactant intermediate, and then performing amphoteric reaction by 'chloroacetic acid process' to obtain the hexadecanamide surfactant. The inventive hexadecanamide surfactant has low foaming performance, low irritation, and good compounding, washing, wetting and penetrating performance; and is widely used as a cleaning agent in daily chemical industry, as well as an emulsifier, a dispersant and an industrial surface cleaning agent.

Description

【Technical field】: [0001] The invention belongs to the technical field of surfactants and their preparation. 【Background technique】: [0002] The palmitic 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 cla...

Claims

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Application Information

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IPC IPC(8): B01F17/22C09K23/22
Inventor 李平郭建龙李栋
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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