Preparation method and application of tentacle type amino acid supported ionic liquid
An ionic liquid, amino acid type technology, applied in chemical instruments and methods, ion exchange, ion exchange regeneration, etc., can solve the problems of increased solid loading, limited carrier surface area, etc., and achieve the effect of large adsorption capacity
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[0016] Implementation example 1: Preparation method of L-proline methyl imidazole ionic liquid
[0017] (1) Weigh 0.1 mol of γ-chloropropyltrimethoxysilane into a 100 mL round-bottom flask, add 0.12 mol of N-methylimidazole, and heat up to 80°C under nitrogen protection and reflux for 16 hours to generate a light yellow viscous liquid. The product was washed 4 times with ethyl acetate to remove the unreacted N-methylimidazole, and then washed 4 times with anhydrous ether, and the solvent was distilled off under reduced pressure. The product was placed at 60° C. and vacuum dried for 36 hours. (2) Weigh 0.05 mol of the product of step (1) in a beaker, add 50 mL of absolute ethanol to dissolve it, and transfer the dissolved solution to a pre-treated strong basic anion exchange resin (201×7 -717) packed in the column (resin volume is 7 times the molar exchange volume, packing height is 300mm), the flow rate of the effluent is controlled not to exceed 2 drops per second, and ethanol i...
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[0018] Implementation Example 2: Preparation method of antennae type silica gel intermediate
[0019] Weigh 3.0 g of silica gel and place it in a 100 mL round bottom flask. Add an appropriate amount of water-dispersed silica gel, add 15 mL of hydrochloric acid and 6.0 g of a glutaraldehyde aqueous solution with a mass fraction of 50% in a flask using a constant pressure dropping funnel, and react for 3 hours at room temperature. After that, 20 mL of 15% polyvinyl alcohol (polymerization degree 1700, alcoholysis rate 99%) solution was added dropwise, and the reaction was stirred at 35°C for 6 h. The product was washed with deionized water to neutrality, dried and stored in a desiccator. The product is white tentacled silica gel powder.
Example Embodiment
[0020] Implementation example 3: Preparation method of antenna type L-proline methylimidazole immobilized ionic liquid
[0021] Disperse 3.0 g of tentacled silica gel powder in 30 mL of acetonitrile, and add 0.03 mol of the product of step (4). Reflux at 80°C for 12h. The product was washed with deionized water three times to remove the unreacted L-proline imidazole ionic liquid, and dried in vacuum at 60°C for 8 hours to obtain the antenna-type amino acid immobilized ionic liquid. The final product is a light yellow solid powder, and the solid load of the ionic liquid is 0.3g ionic liquid / g adsorbent.
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