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
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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...
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