The method for preparing ethylene glycol by hydrolysis of ethylene carbonate
A technology of ethylene carbonate and ethylene glycol, which is applied in the field of ethylene glycol hydrolysis of ethylene carbonate, can solve the problems of rapid decline in activity and easy swelling of resin catalysts, and achieve the effect of enhancing the resistance to temperature and swelling
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Embodiment 1
[0033] Add 58.0 grams of styrene, 0.6 grams of divinylbenzene, 30 grams of polystyrene and 0.6 grams of benzoyl peroxide initiator in a 500 milliliter three-necked flask, and stir for 2.0 hours at 60°C; then add 2.8 grams of multi-walled carbon Nanotubes, continue stirring for 1 hour for pre-polymerization. 260 mL of deionized water in which 2.5 g of polyvinyl alcohol had been dissolved was added. Adjust the stirring speed, and at the same time gradually raise the temperature to 80°C, and react for 5 hours; then raise the temperature to 90°C, react for 5 hours, and finally raise the temperature to 98°C, and react for 6 hours. After the reaction, pour out the upper liquid, wash with 85°C hot water, then wash with cold water, then filter, put in an oven to dry at 80°C, sieve, and collect composite microspheres with a particle size within the range of 0.35 to 0.60 mm a.
[0034] Chloromethylation of composite microspheres: In a 500-ml three-necked flask, add 50 grams of composi...
Embodiment 2
[0038]In a 500 milliliter three-necked flask, add 20 grams of compound chlorine spheres A obtained in [Example 1], 150 milliliters of tetrahydrofuran, and 35.0 grams of tributylamine, stir and react under reflux for 30 hours, filter and remove the mother liquor after the reaction, and Wash with dichloromethane, acetone and water in sequence, and dry under vacuum to obtain chlorine-type nanocomposite quaternary ammonium salt resin A3.
[0039] The transformation of chlorine-type nanocomposite quaternary ammonium resin: in a 200 milliliter beaker, add 10 grams of chlorine-type nanocomposite quaternary ammonium resin A3, 20 grams of Ba(OH) 2 And 40 grams of deionized water, after stirring at room temperature for 18 hours, filter, wash with deionized water, repeat the above process 2 times, filter, wash with deionized water, dry under vacuum to obtain strong alkali type nano-composite quaternary ammonium salt Resin A4.
Embodiment 3
[0041] Add monomer mixture solution (60.0 gram styrene, 1.7 gram divinylbenzene, 60 gram polystyrene, 1.6 gram multi-walled carbon nanotube and 1.0 gram benzoyl peroxide containing initiator in 500 milliliters of three-necked flasks, The solution was first stirred and reacted at 70°C for 0.5 hours), started the agitator, added a mixed solution of 200 milliliters of deionized water and 5 grams of gelatin, raised the temperature to 85°C, reacted for 3 hours, then raised the temperature to 90°C, reacted for 9 hours, and finally The temperature was raised to 100° C., and the reaction was carried out for 10 hours. After the reaction, pour out the upper liquid, wash with 85°C hot water, then wash with cold water, then filter, put in an oven to dry at 80°C, sieve, and collect composite microspheres with a particle size within the range of 0.35 to 0.60 mm b.
[0042] Chloromethylation of composite microspheres: In a 500-ml three-necked flask, add 50 grams of composite microspheres B ...
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