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Dicarboxy capric acid acidamide surfactant and synthetic method

A technology of surfactant and capric acid amide, which is applied in the field of surfactant and its preparation, can solve the problems of small variety and quantity, and achieve the effect of low irritation

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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  • Dicarboxy capric acid acidamide surfactant and synthetic method
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  • Dicarboxy capric acid acidamide surfactant and synthetic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In a four-neck flask equipped with mechanical stirring, a thermometer and a vacuum distillation device, add capric acid 105.5g (0.6mol) and hydroxyethylethylenediamine (molar ratio is 1:1) and start heating and stirring, slowly reacting The 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 3.5 hours until the water came out completely. Heating is stopped and the temperature is lowered to obtain an intermediate for synthesizing dicarboxycapric acid amide surfactant.

[0026] In the four-necked flask that stirs, thermometer, reflux condenser and dropping funnel are equipped with, add the intermediate 15.5g (0.06mol) that is used for the synthesis of dicarboxy capric acid amide surfactant prepared above and heat and stir, in Between 50 and 90°C, add chloroacetic acid solution dropwise at low temperature within 4 hou...

Embodiment 2

[0028] In the four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add capric acid 105.5g (0.6mol) and hydroxyethylethylenediamine (the molar ratio is 1: 1.1 and start heating and stirring, slowly reduce the reaction temperature Rise to 110°C, start the vacuum pump to adjust the vacuum degree of the reaction system until the water is discharged, and gradually increase the reaction temperature to 150°C within 4 hours until the water is completely discharged. Stop heating and lower the temperature to obtain the intermediate of dicarboxydecanoic acid amide surfactant .

[0029] In a four-neck flask equipped with stirring, a thermometer, a reflux condenser and a dropping funnel, add 15.5 g (0.06 mol) of the dicarboxydecanoic acid amide surfactant intermediate and heat and stir. Between 50 and 90° C., 4 Chloroacetic acid solution was added dropwise at low temperature within hours, and then NaOH solution was added dropwise in temperature, di...

Embodiment 3

[0031] In a four-neck flask equipped with mechanical stirring, a thermometer and a vacuum distillation device, add capric acid 105.5g (0.6mol) and hydroxyethylethylenediamine (molar ratio is 1: 1.2) and start heating and stirring, and slowly react The temperature was raised to 100°C, and the vacuum pump was started 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 4 hours until the water came out completely. Heating is stopped and the temperature is lowered to obtain a dicarboxycapric acid amide surfactant intermediate.

[0032] In a four-neck flask equipped with stirring, a thermometer, a reflux condenser and a dropping funnel, add 15.5 g (0.06 mol) of the dicarboxydecanoic acid amide surfactant intermediate and heat and stir. Between 50 and 90° C., 4 Chloroacetic acid solution was added dropwise at low temperature within hours, and then NaOH solution was added dropwise in temperature...

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Abstract

A dicarboxyl capric amide surfactant and a synthetic method thereof are provided. The inventive dicarboxyl capric amide surfactant has the structural formula as above. The synthetic method is novel in the direct synthesis of amide surfactants by vacuum-amphoteric method without ring closing reactions. The method includes the following steps: synthesizing a dicarboxyl capric amide surfactant intermediate from capric acid and hydroxyethylethylene diamine as raw materials, and then performing amphoteric reaction by 'chloroacetic acid process' to obtain the dicarboxyl capric amide surfactant, wherein the mole ratio of intermediate to chloroacetic acid to NaOH is 1:2-2.6:4-5.2. The inventive dicarboxyl capric amide surfactant has good forming performance, low irritation, and good washing, wetting and penetrating performance, and can be used as a cleaning agent in daily chemical industry, a softening agent in textile industry, a corrosion inhibitor and a foaming agent.

Description

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

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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