Method for Separation of Alkenes/Alkanes Using Protonated Ionic Liquid-Based Deep Eutectic Solvents
A technology of deep eutectic solvents and protonated ions, which is applied in the fields of chemical technology and gas separation and purification, to achieve the effects of easy large-scale production, high thermal stability, low volatility, and easy regulation
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Embodiment 1
[0043] The experimental device for synthesizing ionic liquids is mainly a three-necked flask with a condensing reflux tube on the top and a dropping funnel and a stirring device. Dissolve the accurately weighed 49.2545g ethanolamine in anhydrous methanol and place it in the flask, and open the stirrer to stir. Under high-speed stirring, add nitric acid solution (78.1705g, 65.0%) drop by drop, the molar weight of nitric acid and ethanolamine Equal, dripping 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, filtered with suction to obtain white crystals, and finally dried in a vacuum oven at 60°C for 12 hours to obtain ethanolamine nitrate.
[0044] Accurately weighed 7.7413g of ethanolamine nitrate protonated ionic liquid was placed in a single-necked bottle, 5.7449g of glycerol was added at a molar ratio of 1:1, and magnetically stirred at 60°C for 4 hours to obtain a colorless and tra...
Embodiment 2
[0052] The experimental device for synthesizing ionic liquids is mainly a three-necked flask with a condensing reflux tube on the top and a dropping funnel and a stirring device. Will accurately weigh 114.4455g dimethylamine aqueous solution (30wt%) and be placed in the flask, and open stirrer and stir, under high-speed stirring, dropwise add nitric acid solution (79.084g, 65.0%), the molar weight of nitric acid Equal to dimethylamine, it will be dropped within 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, filtered with suction to obtain white crystals, and finally dried in a vacuum oven at 65°C for 12 hours to obtain dimethylamine nitrate.
[0053] Accurately weighed 3.5471g of dimethylamine nitrate protonated ionic liquid was placed in a single-necked bottle, 2.0369g of ethylene glycol was added at a molar ratio of 1:1, and magnetically stirred at 60°C for 2h to obtain a colorless and tr...
Embodiment 3
[0055] The experimental device for synthesizing ionic liquids is mainly a three-necked flask with a condensing reflux tube on the top and a dropping funnel and a stirring device. Accurately weighed 59.9733g triethylamine is dissolved in anhydrous methanol and placed in the flask, and the stirrer is opened to stir, and under high-speed stirring, nitric acid solution (57.4535g, 65.0%) is added dropwise, the molar amount of nitric acid Equal to triethylamine, it will be dropped within 60 minutes. And react at 40°C for 8h. After the reaction was completed, part of the solvent was removed by rotary evaporation, crystallized at 0°C, and suction filtered to obtain white crystals, which were finally dried in a vacuum oven at 65°C for 12 hours to obtain triethylamine nitrate protonated ionic liquid.
[0056] Accurately weighed 16.42 g of triethylamine nitrate protonated ionic liquid was placed in a single-necked bottle, 9.209 g of glycerol was added at a molar ratio of 1:1, and magnet...
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Abstract
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