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Dicarboxy oleic acid acidamide surfactant and synthetic method

A surfactant, oleic acid amide technology, applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve the problem of small variety and quantity, achieve excellent anti-rust performance, improve stability, prevent recurrence. effect of deposition

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 begun. At present, a small number of products have been put into the market, but the variety and quantity are not many. Therefore, in terms of research and application of amphoteric surfactants, my country is still in its infancy.

Method used

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

Examples

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Effect test

Embodiment 1

[0026] In a four-necked flask equipped with a mechanical stirrer, a thermometer and a vacuum distillation device, add 173.0 g (0.6 mol) of oleic acid and hydroxyethylethylenediamine (a molar ratio of 1:1) to 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 3 hours until the water came out completely. Heating is stopped and the temperature is lowered to obtain an intermediate for synthesizing dicarboxy oleic acid amide surfactant.

[0027] In the four-necked flask that stirs, thermometer, reflux condenser and dropping funnel are equipped with, add the intermediate 22.2g (0.06mol) that is used for the synthesis of dicarboxyl oleic acid amide surfactant prepared above and heat and stir, in Between 50 and 90°C, add chloroacetic acid solution dropwise at low temperature within ...

Embodiment 2

[0029] In a four-necked flask equipped with a mechanical stirrer, a thermometer and a vacuum distillation device, add 173.0 g (0.6 mol) of oleic acid and hydroxyethylethylenediamine (the molar ratio is 1:1.1) and start heating and stirring, and slowly react The temperature was raised to 110°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 an intermediate for synthesizing dicarboxy oleic acid amide surfactant.

[0030] In a four-neck flask equipped with stirring, a thermometer, a reflux condenser and a dropping funnel, add 22.2 g (0.06 mol) of the above-prepared intermediate for the synthesis of dicarboxyl oleic acid amide and heat and stir. At 90°C, add chloroacetic acid solution dropwise at low temperature within 4 hours, and then gradually incre...

Embodiment 3

[0032] In a four-neck flask equipped with a mechanical stirrer, a thermometer and a vacuum distillation device, add 173.0 g (0.6 mol) of oleic acid and hydroxyethylethylenediamine (a molar ratio of 1:1.2) to start heating and stirring, and slowly react 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 4.5 hours until the water came out completely. Heating is stopped and the temperature is lowered to obtain an intermediate for synthesizing dicarboxy oleic acid amide surfactant.

[0033] In the four-necked flask that stirs, thermometer, reflux condenser and dropping funnel are equipped with, add the intermediate 22.2g (0.06mol) that is used for the synthesis of dicarboxyl oleic acid amide surfactant prepared above and heat and stir, in Between 50 and 90°C, add chloroacetic acid solution dropwise at low temperature wit...

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Abstract

A dicarboxyl oleic amide surfactant and a synthetic method thereof are provided. The inventive dicarboxyl oleic 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 oleic amide surfactant intermediate from oleic acid and hydroxyethylethylene diamine as raw materials, and then performing amphoteric reaction by 'chloroacetic acid process' to obtain the dicarboxyl oleic amide surfactant, wherein the mole ratio of dicarboxyl oleic amide intermediate to chloroacetic acid to NaOH is 1: (2-2.6):(4-5.2). The inventive dicarboxyl oleic amide surfactant has good effects of emulsifying, dispersing and suspending greasy dirt in mineral and vegetable oils, helps prevent re-deposition of greasy dirt, and has excellent effect of preventing rust formation on steel, cast iron and other metals. Additionally, the oleic amide surfactant can enhance the stability of anionic and non-ionic emulsions and the lubricating capability of emulsified oils. The oleic amide surfactant is widely used in products such as metal cleaners, drilling oil, machining oil and viscosity reducers in petroleum extraction.

Description

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

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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