Dodecoic acid acidamide surfactant and synthetic method

A technology of lauric acid amide and surfactant, 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 excellent compatibility and low irritation

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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  • Dodecoic acid acidamide surfactant and synthetic method
  • Dodecoic acid acidamide surfactant and synthetic method
  • Dodecoic acid acidamide surfactant and synthetic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In the four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add 120g (0.6mol) of lauric acid and hydroxyethylethylenediamine (molar ratio is 1: 1) and start heating and stirring, slowly reduce the reaction temperature Raise to 100°C, start the vacuum pump to adjust the vacuum degree of the reaction system until the water comes out, and gradually raise the reaction temperature to 150°C within 4 hours until the water comes out completely. Stop heating, cool down, obtain lauric acid amide surfactant intermediate.

[0027] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 17.2g (0.06mol) of lauric acid amide surfactant intermediate and heat and stir. Add chloroacetic acid solution dropwise at low temperature, then gradually increase the temperature and add NaOH solution dropwise, the lauric acid amide surfactant intermediate: chloroacetic acid: NaOH molar ratio is 1:1:2, then react f...

Embodiment 2

[0029] In the four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add 120g (0.6mol) of lauric acid and hydroxyethylethylenediamine (molar ratio is 1: 1.1) and start heating and stirring, slowly reduce the reaction temperature Raise to 110°C, start the vacuum pump to adjust the vacuum degree of the reaction system until the water comes out, and gradually raise the reaction temperature to 150°C within 4.5 hours until the water comes out completely. Stop heating, cool down, obtain lauric acid amide surfactant intermediate.

[0030] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 17.2g (0.06mol) of lauric acid amide surfactant intermediate and heat and stir. Add chloroacetic acid solution dropwise at low temperature, then gradually increase the temperature and add NaOH solution dropwise, the lauric acid amide surfactant intermediate: chloroacetic acid: NaOH molar ratio is 1: 1.3: 2.6, th...

Embodiment 3

[0032] In the four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add 120g (0.6mol) of lauric acid and hydroxyethylethylenediamine (molar ratio is 1: 1.2) and start heating and stirring, slowly reduce the reaction temperature Raise to 100°C, start the vacuum pump to adjust the vacuum degree of the reaction system until the water comes out, and gradually raise the reaction temperature to 150°C within 5 hours until the water comes out completely. Stop heating, cool down, obtain lauric acid amide surfactant intermediate.

[0033] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 17.2g (0.06mol) of lauric acid amide surfactant intermediate and heat and stir. Add chloroacetic acid solution dropwise at low temperature, then gradually increase the temperature and add NaOH solution dropwise, the lauric acid amide surfactant intermediate: chloroacetic acid: NaOH molar ratio is 1: 1.2: 2.4, then...

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Abstract

A lauric amide surfactant and synthetic method thereof are provided. The inventive lauric amide surfactant has the structural formula as above. The synthetic method includes the following steps: synthesizing a lauric amide surfactant intermediate from lauric acid and hydroxyethylethylene diamine as raw materials, and then performing amphoteric reaction by 'chloroacetic acid process' to obtain the lauric amide surfactant. The invention is novel in the direct synthesis of amide surfactants by vacuum amphoteric method without ring closing reactions. The inventive lauric amide surfactant has good forming performance, low irritation, and excellent compounding, washing, wetting and penetrating performance; and can be used in baby and adult shampoos, synthetic fibers, antistatic agent in plastic industry, lanolin amide softening agent, dye leveler in textile industry, corrosion inhibitors and foaming agent.

Description

【Technical field】: [0001] The invention belongs to the technical field of surfactants and their preparation. 【Background technique】: [0002] The lauric acid amide surfactant involved in the present invention is a novel surfactant whose 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 class of...

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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