Preparation method of epsilon-caprolactam-tetraalkyl ammonium halide-SO2-H2O hydrido complex
A technology of -SO2-H2O and tetraalkylammonium halides, which is applied in chemical instruments and methods, separation methods, and separation of dispersed particles, can solve the problems of high viscosity, high regeneration energy consumption, and high cost, and achieve high yield, The preparation method is simple and the effect of efficient absorption
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Embodiment 1
[0021] a. Weigh 0.421 mol of ε-caprolactam and 0.165 mol of tetrapropylammonium bromide into a round-bottomed flask equipped with a rotor, stir and heat in a constant temperature water bath at 75°C for 2 hours to obtain ε-caprolactam-tetrapropyl bromide ammonium chloride ionic liquid.
[0022] b. Dissolve the ε-caprolactam-tetrapropylammonium bromide ionic liquid obtained in step a with distilled water at a molar concentration of 2 mol / L, and mix uniformly to obtain an aqueous solution of ε-caprolactam-tetrapropylammonium bromide ionic liquid.
[0023] c. Mix the ε-caprolactam-tetrapropylammonium bromide ionic liquid aqueous solution obtained in step b with 1.00mol of SO 2 Gas reaction for 1h, phase separation, the lower layer is ε-caprolactam-tetrapropylammonium bromide-SO 2 -H 2 O hydrogenation complex, productive rate 95% (mass ratio).
Embodiment 2
[0025] a. Weigh 0.390 mol of ε-caprolactam and 0.223 mol of tetraethylammonium bromide into a round bottom flask equipped with a rotor, stir and heat in a constant temperature water bath at 75°C for 2 hours to obtain ε-caprolactam-tetraethyl bromide ammonium chloride ionic liquid.
[0026] b. Dissolve the ε-caprolactam-tetraethylammonium bromide ionic liquid obtained in step a with distilled water at a molar concentration of 1 mol / L, and mix uniformly to obtain an aqueous solution of ε-caprolactam-tetraethylammonium bromide ionic liquid.
[0027] c. the ε-caprolactam-tetraethylammonium bromide ionic liquid aqueous solution obtained in step b and 0.50mol of SO 2 Reaction for 1h, phase separation, the lower layer is ε-caprolactam-tetraethylammonium bromide-SO 2 -H 2 O hydrogenation complex, yield 93% (mass ratio).
Embodiment 3
[0029] a. Weigh 0.318mol of ε-caprolactam and 0.373mol of tetramethylammonium bromide into a round-bottomed flask equipped with a rotor, stir and heat in a constant temperature water bath at 75°C for 2 hours to obtain ε-caprolactam-tetramethylbromide ammonium chloride ionic liquid.
[0030] b. Dissolve the ε-caprolactam-tetramethylammonium bromide ionic liquid obtained in step a with distilled water at a molar concentration of 0.1 mol / L, and mix uniformly to obtain an aqueous solution of ε-caprolactam-tetramethylammonium bromide ionic liquid.
[0031] c. the ε-caprolactam-tetramethylammonium bromide ionic liquid aqueous solution that step b obtains in the SO with 0.12mol 2 Gas reaction for 1h, phase separation, the lower layer is ε-caprolactam-tetramethylammonium bromide-SO 2 -H 2 O hydrogenation complex, productive rate 90% (mass ratio).
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