A kind of ionic liquid base gemini cationic surfactant and synthetic method
A surfactant and ionic liquid technology, applied in the field of ionic liquid-based Gemini cationic surfactant and synthesis, can solve the problems of high toxicity, high melting point, unfavorable application, etc., and achieve the effect of low irritation and high synthesis yield
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Embodiment 1
[0029] The synthetic method of the ionic liquid-based Gemini cationic surfactant of the present embodiment is as follows:
[0030] (1) Add 40.38g (0.2mol) of 1,3-dibromopropane and 20g of methanol into a four-neck round bottom flask, heat up to boiling under stirring, add 1g of tetrabutylammonium bromide, and dropwise add 10.67g (0.05mol )N,N-Dimethyldodecyl tertiary amine, maintain the reflux temperature, stir and react for 8 hours, distill the methanol off under reduced pressure, wash the solid with ethyl acetate three times, and dry the filter cake in vacuum at 50°C for 10 hours to obtain Intermediate N,N-dimethyl (1-bromopropyl) dodecyl ammonium bromide, yield 90.5%;
[0031] (2) Add 30g of isopropanol to a four-neck round bottom flask, then add 18.79g (0.0453mol) N,N-dimethyl (1-bromopropyl) dodecyl ammonium bromide and 9.43g (0.0453mol) mol) N-decyl imidazole, then add 1g of tetrabutylammonium bromide and stir to raise the temperature to 80°C. After stirring and reactin...
Embodiment 2
[0041] The synthetic method of the ionic liquid-based Gemini cationic surfactant of the present embodiment is as follows:
[0042] (1) Add 59.78g (0.202mol) of 1,3-diiodopropane and 20g of ethanol into a four-neck round bottom flask, heat up to boiling under stirring, add 1g of tetrabutylammonium iodide, dropwise add 14.23g (0.0668mol )N,N-Dimethyldodecyl tertiary amine, maintain the reflux temperature, stir and react for 8 hours, distill off the ethanol under reduced pressure, wash the solid with chloroform three times, and dry the filter cake in vacuum at 60°C for 6 hours to obtain the intermediate N, N-dimethyl (1-iodopropyl) dodecyl ammonium iodide, yield 96%;
[0043] (2) Add 30g of ethanol to a four-neck round bottom flask, then add 32.6g (0.064mol) N,N-dimethyl (1-iodopropyl) dodecyl ammonium iodide, 15.89g (0.0672mol) N-dodecyl imidazole and 1g tetrabutylammonium iodide, stirred and raised to 70°C, stirred for 36 hours, distilled off ethanol under reduced pressure, wa...
Embodiment 3
[0046] The synthetic method of the ionic liquid-based Gemini cationic surfactant of the present embodiment, the steps are as follows:
[0047] (1) Add 19.05g (0.15mol) of 1,4-dichlorobutane and 20g of ethanol into a four-neck round bottom flask, heat up to boiling under stirring, add 1.5g of tetrabutylammonium chloride, dropwise add 10.65g ( 0.05mol) N,N-Dimethyldodecyl tertiary amine, maintain the reflux temperature, stir and react for 9 hours, distill off the ethanol under reduced pressure, wash the solid with chloroform three times, and dry the filter cake in vacuum at 60°C for 6 hours to obtain Intermediate N,N-dimethyl (1-chlorobutyl) dodecyl ammonium chloride, yield 95%;
[0048] (2) Add 20g of ethanol to a four-neck round bottom flask, then add 19.35g (0.0569mol) N,N-dimethyl (1-chlorobutyl) dodecyl ammonium chloride, 18.05g (0.068mol) N-Tetradecyl imidazole and 1g tetrabutylammonium chloride, stirred and raised to 60°C, stirred for 72 hours, distilled off ethanol unde...
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