Synthesis method of imidazoline compound

A synthesis method and compound technology, applied in chemical instruments and methods, chemical/physical processes, organic chemistry, etc., can solve the problems of precipitation, opacity and turbidity of imidazoline surfactant aqueous solution, and achieve low production cost and high production equipment Effects with low requirements and stable quality

Active Publication Date: 2011-06-15
广州星业科技股份有限公司
View PDF9 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the bisamide content is too high, the imidazoline surfactant aqueous solution will be opaque, or precipitation will occur, especially if it is left for a long time, the imidazoline surfactant aqueous solution is prone to turbidity and other unstable phenomena

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Synthesis method of imidazoline compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In a 1-liter four-neck flask equipped with mechanical stirring, nitrogen inlet pipe, thermometer and vacuum distillation device, add 400 grams of lauric acid, 270.4 grams of hydroxyethylethylenediamine, and 3.4 grams of sodium hydroxide, nitrogen, and stir The temperature was raised to 130°C. Start timing and adjust the heating rate at the same time. It takes 4 hours to raise the temperature to 200° C., keep the reaction at this temperature for 1 hour, and distill off the water generated by the reaction. Start the vacuum pump, adjust the pressure of the reaction system to 5000Pa, start timing and adjust the decompression speed at the same time, and reduce the pressure of the reaction system to 101Pa in 2 hours. Under the condition of material temperature of 200° C. and reaction system pressure of 101 Pa, heat preservation reaction was carried out for 1 hour, and the water generated by the reaction and residual hydroxyethylethylenediamine were distilled off. Heating was...

Embodiment 2

[0033] In a 1-liter four-necked flask equipped with mechanical stirring, nitrogen inlet pipe, thermometer and vacuum distillation device, add 456 grams of myristic acid, 291.2 grams of hydroxyethylethylenediamine, and 3.7 grams of sodium hydroxide, and stir with nitrogen gas. Lower the temperature to 130°C. Start timing and adjust the heating rate at the same time. It takes 4 hours to raise the temperature to 200° C., keep the reaction at this temperature for 1 hour, and distill off the water generated by the reaction. Start the vacuum pump, adjust the pressure of the reaction system to 5000Pa, start timing and adjust the decompression speed at the same time, and reduce the pressure of the reaction system to 101Pa in 2 hours. Under the condition of material temperature of 200° C. and reaction system pressure of 101 Pa, heat preservation reaction was carried out for 1 hour, and the water generated by the reaction and residual hydroxyethylethylenediamine were distilled off. Hea...

Embodiment 3

[0035] In a 1 liter four-neck flask equipped with mechanical stirring, nitrogen inlet pipe, thermometer and vacuum distillation device, add 400 grams of lauric acid, 291.2 grams of hydroxyethylethylenediamine, and 5.5 grams of sodium hydroxide, nitrogen, and stir The temperature was raised to 150°C. Start timing and adjust the heating rate at the same time, heat up to 190° C. in 3 hours, keep the reaction at this temperature for 2 hours, and distill off the water generated by the reaction. Start the vacuum pump, adjust the pressure of the reaction system to 4000Pa, start timing and adjust the decompression speed, and reduce the pressure of the reaction system to 202Pa in 3 hours. Under the conditions of material temperature 190° C. and reaction system pressure 202 Pa, heat preservation reaction was carried out for 2 hours, and the water generated by the reaction and residual hydroxyethylethylenediamine were distilled off. Heating was stopped, and the temperature was lowered t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a synthesis method of an imidazoline compound. The method comprises the following steps of: heating fatty acid and hydroxyethyl ethylenediamine which are used as raw materials to 80-150 DEG C in the presence of a catalyst in a nitrogen atmosphere, and then rising the temperature to 190-220 DEG C in a gradient mode for carrying out a nitrogen acylation reaction to form alkyl amide; and carrying out gradient pressure reduction, dewatering and cyclization on the formed alkyl amide to prepare the imidazoline compound. The synthesis method has simple process and low requirement on production equipment; by adopting the method of the invention, the generation quantity of bi-amide which is a side product can be reduced, and the content of the bi-amide in the prepared imidazoline compound can be reduced to be below 0.5 percent by mass; and meanwhile, the prepared imidazoline compound has stable quality and can be placed for a long time without turbid phenomena.

Description

technical field [0001] The invention belongs to the technical field of synthesis of surfactants in organic chemistry, and in particular relates to a synthesis method of imidazoline compounds. Background technique [0002] There are many types of imidazoline surfactants, and their application fields are relatively wide. Imidazoline surfactant has the following characteristics: (1), non-toxic, non-irritating to skin and eyes; (2), highly biodegradable, environmentally friendly; (3), excellent washing performance and acid-base stability; (4) Good compatibility with anionic, cationic and non-ionic surfactants; (5) Good emulsifying power, bactericidal power, corrosion inhibition power, transferability, foam stability and deodorization performance. Imidazoline surfactants are suitable for high-end cleaning agents and textile softeners in the daily chemical industry, and are used as corrosion inhibitors, bactericides, emulsifiers, dispersants, foaming agents, and industrial surfac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/14B01F17/32B01F17/38C09K23/32C09K23/38
Inventor 王振雨孟巨光
Owner 广州星业科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap