Preparation method of sodium isethionate
A technology of sodium isethionate and ethanesulfonic acid, applied in the preparation of sulfonate, organic chemistry, etc., can solve the problems of increased workload, high energy consumption, cumbersome steps, etc., and achieve the effect of improving quality and application range
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Embodiment 1
[0035] Add 581.67g of choline chloride to the beaker, then add 1000g of pentafluoroethanesulfonic acid dropwise to the beaker, keep stirring during the dropwise addition to avoid local overheating, and stir at 20-50°C until completely dissolved to obtain the formula Choline Chloride-Pentafluoroethanesulfonic Acid Deep Eutectic Solvent.
[0036] Introduce 62.5 g of mixed inhibitors of sulfur dioxide and sulfur trioxide (mass ratio: 1:1) into 500.0 g of choline chloride-perfluoroethanesulfonic acid deep eutectic solvent, heat up to 150 ° C, press to 4 MPa, and stir 2h, to ensure that the solvent is fully absorbed and passivated.
[0037] Configure 1000g sodium bisulfite solution (12wt%) with passivation solvent and join in the reactor, temperature control is at 45 ℃, feed ethylene oxide 60.9g with the flow velocity of 15g / min in the reactor behind, during the reaction Regulate the reaction pressure at 2 bar, and time the reaction for 25 minutes after passing through the ethylen...
Embodiment 2
[0039]Add 788.16g of choline chloride to the beaker, then add 1000g of trifluoroethanesulfonic acid dropwise to the beaker, keep stirring during the dropwise addition to avoid local overheating, stir at 20-50°C until completely dissolved, and obtain the formula Choline chloride-trifluoroethanesulfonic acid deep eutectic solvent.
[0040] Pass into 500.0g of choline chloride-trifluoroethanesulfonic acid deep eutectic solvent 41.67g of mixed inhibitor of sulfur dioxide and sulfur trioxide (mass ratio is 1:0.5), heat up to 100°C, press to 1MPa, Stir for 0.5h to ensure that the solvent is fully absorbed and passivated.
[0041] Configure 1000g sodium bisulfite solution (5wt%) with passivation solvent and join in the reactor, temperature control is at 25 ℃, feed ethylene oxide 22.2g with the flow rate of 5.0g / min in the reactor behind, the reaction process Regulate the reaction pressure at 1 bar, and time the reaction for 5 minutes after passing through the ethylene oxide. After t...
Embodiment 3
[0043] Add 498.57g of choline chloride to the beaker, then dropwise add 1000g of pentafluoroethanesulfonic acid into the beaker, keep stirring during the dropwise addition to avoid local overheating, stir at 20-50°C until completely dissolved, and obtain the formula Choline Chloride-Pentafluoroethanesulfonic Acid Deep Eutectic Solvent.
[0044] Introduce 38.46 g of mixed inhibitors of sulfur dioxide and sulfur trioxide (mass ratio: 1:0.8) into 500.0 g of choline chloride-perfluoroethanesulfonic acid deep eutectic solvent, raise the temperature to 200 ° C, and press to 8.0 MPa, Stir for 1.0h to ensure that the solvent is fully absorbed and passivated.
[0045] Configure 1000g of sodium bisulfite solution (10wt%) with a passivation solvent and add it to the reactor, control the temperature at 80°C, then feed 59.25g of ethylene oxide into the reactor at a flow rate of 10.0g / min, and the reaction process Regulate the reaction pressure at 4.0bar, and time the reaction for 60 minut...
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