Preparation method of ionic liquid
A technology of ionic liquids and intermediates, applied in the field of preparation of ionic liquids, to achieve the effects of improved application prospects, wide electrochemical window, good ionic conductivity and thermal conductivity
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Embodiment 1
[0016] 1) Add 1 mol of N-methylimidazole to a three-necked flask under nitrogen protection, heat the three-necked flask to 70°C, keep the temperature constant, and turn on magnetic stirring at a stirring speed of 100rpm;
[0017] 2) Slowly add 1 mol of n-bromobutane dropwise within 15 hours by the constant pressure funnel method, and use a spherical condenser tube to condense and reflux during the reaction process;
[0018] 3) After the reaction time is up, oily crystals are obtained, which are filtered and washed with ethyl acetate solvent to obtain a reaction intermediate;
[0019] 4) Add the reaction intermediate to the three-necked flask, add 150ml of distilled water, and stir until the above reaction intermediate is completely dissolved;
[0020] 5) Add 1.1 mol of ammonium hexafluorophosphate to the three-necked flask, mechanically stir for 4 hours at 25°C, let stand to separate layers, wash the lower organic phase with distilled water for 4 times, and then dry it;
[00...
Embodiment 2
[0024] 1) Add 1.5mol of N-ethylimidazole to a three-necked flask under nitrogen protection, heat the three-necked flask to 60°C, keep the temperature constant, and turn on magnetic stirring at a stirring speed of 120rpm;
[0025] 2) Slowly add 1.5 mol of n-pentane bromide dropwise within 20 hours through the constant pressure funnel method, and use a spherical condenser tube to condense and reflux during the reaction process;
[0026] 3) After the reaction time is up, oily crystals are obtained, which are filtered and washed with butyl acetate solvent to obtain a reaction intermediate;
[0027] 4) Add the reaction intermediate to the three-necked flask, add 240ml of distilled water, and stir until the above reaction intermediate is completely dissolved;
[0028] 5) Add 1.8 mol of ammonium hexafluorophosphate into the three-necked flask, mechanically stir for 5 hours at 25°C, let stand to separate layers, wash the lower organic phase with distilled water for 6 times, and then d...
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