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Oleic acid acidamide surfactant and synthetic method

A technology of surfactant and oleic acid amide, which is applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve the problems of limited varieties and quantities, achieve excellent antirust performance, prevent redeposition, and improve stability sexual effect

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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  • Oleic 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 oleic acid 173.0g (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 oleic acid amide surfactant intermediate.

[0027] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 22.2g (0.06mol) of oleic 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 oleic acid amide surfactant intermediate: chloroacetic acid...

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 3.5 hours until the water came out completely. Heating is stopped, and the temperature is lowered to obtain the oleic acid amide surfactant intermediate.

[0030] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 22.2g (0.06mol) of oleic 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 oleic acid amide surfactant intermediate: c...

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 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 the oleic acid amide surfactant intermediate.

[0033] In a four-neck flask equipped with stirring, thermometer, reflux condenser and dropping funnel, add 22.2g (0.06mol) of oleic 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 oleic acid amide surfactant intermediate: chloroac...

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Abstract

An oleamide surfactant and a synthetic method thereof are provided. The inventive oleic amide surfactant has the structural formula as above. The synthetic method includes the following steps: synthesizing an 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 oleic amide surfactant. Based on the summery of research findings by the predecessors, the invention is novel in direct synthesis of amide surfactants by vacuum-amphoteric method without ring closing reactions. The inventive 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 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 class of ...

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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