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Dicarboxy dodecoic acid amide 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

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 dodecoic acid amide surfactant and synthetic method
  • Dicarboxy dodecoic acid amide surfactant and synthetic method
  • Dicarboxy dodecoic acid amide surfactant and synthetic method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] In a four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add 120g (0.6mol) of lauric acid and hydroxyethylethylenediamine (molar ratio 1:1) to start heating and stirring, and slowly reduce the reaction temperature When the temperature is raised to 100°C, the vacuum pump is turned on to adjust the vacuum degree of the reaction system until the water is discharged, and the reaction temperature is gradually increased to 150°C within 3 hours until the water is completely discharged. The heating is stopped and the temperature is lowered to obtain an intermediate for synthesizing the dicarboxyl lauric acid amide surfactant.

[0026] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 17.2g (0.06mol) of dicarboxyl lauric acid amide surfactant intermediate and heat and stir. Add chloroacetic acid solution at low temperature within hours, then gradually add NaOH solution at low temperature. Th...

Embodiment 2

[0028] In a four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add 120g (0.6mol) of lauric acid and hydroxyethylethylenediamine (molar ratio 1:1.1) to start heating and stirring, and slowly reduce the reaction temperature The 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 was discharged. The reaction temperature was gradually increased to 150°C within 4 hours until the water was completely discharged. The heating is stopped and the temperature is lowered to obtain an intermediate for synthesizing the dicarboxyl lauric acid amide surfactant.

[0029] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 17.2g (0.06mol) of dicarboxyl lauric acid amide surfactant intermediate and heat and stir. Add chloroacetic acid solution at low temperature within hours, then gradually add NaOH solution at low temperature, ...

Embodiment 3

[0031] In a four-neck flask equipped with mechanical stirring, thermometer and vacuum distillation device, add 120g (0.6mol) of lauric acid and hydroxyethylethylenediamine (molar ratio 1:1.2) to start heating and stirring, and slowly reduce the reaction temperature When the temperature is raised to 100°C, the vacuum pump is started to adjust the vacuum degree of the reaction system until the water is discharged, and the reaction temperature is gradually increased to 150°C within 5 hours until the water is completely discharged. The heating is stopped and the temperature is lowered to obtain an intermediate for synthesizing the dicarboxyl lauric acid amide surfactant.

[0032] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 17.2g (0.06mol) of dicarboxyl lauric acid amide surfactant intermediate and heat and stir. Add chloroacetic acid solution at low temperature within hours, and then gradually add NaOH solution at low temperature...

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Abstract

A dicarboxyl lauric amide surfactant and a synthetic method are provided. The inventive dicarboxyl lauric amide surfactant has the structural formula mentioned 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 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 dicarboxyl stearic amide surfactant, wherein the mole ratio of dicarboxyl lauric amide intermediate to chloroacetic acid to NaOH is 1: 2-2.6:4-5.2. The inventive dicarboxyl lauric amide surfactant has good foaming performance, low irritation, and excellent compounding, washing, wetting and penetrating performance; and is used in infant and adult shampoos, synthetic fibers, antistatic agents in plastic processing, softening agents like lanolin amidate, dye levelers in textile industry, corrosion inhibitors and foaming agents.

Description

【Technical Field】: [0001] The invention belongs to the technical field of surfactants and their preparation. 【Background technique】: [0002] The dicarboxyl lauric acid amide surfactant involved in the present invention is a new type of surfactant, and its performance is comparable to carboxylic acid imidazoline amphoteric surfactants. [0003] Aliphatic hydrocarbon-based imidazoline type amphoteric surfactants have excellent washing, wetting, foaming and dispersing properties [1，2] , Very low irritation [3] , Low or non-toxic [4] , Antistatic [5] , Antibacterial [6] , Friendly to the environment. [0004] Amphoteric surfactants are classified according to their structure: (1) imidazoline amphoteric surfactants (2) betaine amphoteric surfactants (3) amino acid surfactants (4) lecithin surfactants. Among them, lecithin surfactants are natural surfactants, and the rest are synthetic [7] . [0005] Amphoteric surfactants are a relatively late class of surfactants. It was only report...

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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