Method of separating olefins/alkanes via eutectic solvent based on protonated ionic liquid

[0042] Example 1

[0043] The experimental device for synthesizing ionic liquids is mainly a three-necked flask equipped with a condenser reflux tube, a dropping funnel and a stirring device. Dissolve 49.2545g ethanolamine accurately weighed in anhydrous methanol and place it in a flask, turn on the stirrer and stir. Under high-speed stirring, add nitric acid solution (78.1705g, 65.0%) dropwise, the molar amount of nitric acid and ethanolamine Equal, drip in 60 minutes. And react at 40°C for 4 hours. After the reaction, part of the solvent was removed by rotary evaporation, crystallized at 0°C, and filtered with suction to obtain white crystals. Finally, the obtained white crystals were dried in a vacuum drying oven at 60°C for 12 hours to obtain ethanolamine nitrate.

[0044] Accurately weighed 7.7413g ethanolamine nitrate protonated ionic liquid was placed in a single-necked flask, 5.7449g glycerol was added at a molar ratio of 1:1, and magnetically stirred at 60°C for 4h to obtai

[0051] Example 2

[0052] The experimental device for synthesizing ionic liquid is mainly a three-necked flask equipped with a condenser reflux tube, a dropping funnel and a stirring device. Accurately weigh 114.4455g of dimethylamine aqueous solution (30wt%) and place it in a flask, and turn on the stirrer to stir. Under high-speed stirring, add nitric acid solution (79.084g, 65.0%) dropwise, the molar amount of nitric acid It is equal to dimethylamine, dripping in 60 minutes. And react at 25°C for 8h. After the reaction, part of the solvent was removed by rotary evaporation, crystallized at 0°C, and filtered by suction to obtain white crystals. Finally, the obtained white crystals were dried in a vacuum drying oven at 65°C for 12 hours, and finally dimethylamine nitrate was obtained.

[0053] Place accurately weighed 3.5471 g of dimethylamine nitrate protonated ionic liquid in a single-necked bottle, add 2.0369 g of ethylene glycol at a molar ratio of 1:1, and magnetically stir at

[0054] Example 3

[0055] The experimental device for synthesizing ionic liquid is mainly a three-necked flask equipped with a condenser reflux tube, a dropping funnel and a stirring device. Dissolve 59.9733g of triethylamine in anhydrous methanol and place it in a flask. Turn on the stirrer to stir. Under high-speed stirring, add nitric acid solution (57.4535g, 65.0%), the molar amount of nitric acid. It is equal to triethylamine, dripping in 60 minutes. And react at 40°C for 8h. After the reaction, part of the solvent was removed by rotary evaporation, crystallized at 0°C, and filtered with suction to obtain white crystals. Finally, the obtained white crystals were dried in a vacuum drying oven at 65°C for 12 hours, and finally triethylamine nitrate protonated ionic liquid was obtained.

[0056] Accurately weighed 16.42g of triethylamine nitrate protonated ionic liquid was placed in a single-necked bottle, added with 9.209g of glycerol at a molar ratio of 1:1, and magnetically sti