Preparation method of macroporous strong-alkaline anion exchange resin for removing nitrate in water
An exchange resin, nitrate technology, applied in anion exchange, ion exchange, ion exchange water/sewage treatment and other directions, can solve the problem of lack of efficient and cheap ion exchanger, achieve good development prospects and practical significance, long reaction time, Corrosive effect
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Embodiment 1
[0026] (1) Aggregation:
[0027] (1) Preparation of the water phase: 232.85ml of 2.5% polyvinyl alcohol (PVA) solution, 60.48ml of gelatin solution with a mass fraction of 2%, 9.07g of tricalcium phosphate, 3.02g of sodium chloride, and a mass fraction of 1‰ Mix 9.07ml of methylene blue solution and 0.15g of EDTA evenly and set aside.
[0028] (2) Preparation of the oil phase: Mix 80mL of styrene, 4mL of divinylbenzene, 0.8g of benzoyl peroxide and 67.2mL of liquid paraffin for later use.
[0029] (3) Operation process: Add the water phase to a 500ml three-neck flask with stirring, condenser, and thermometer, and stir at 200r / min. When the water bath is heated to 60°C, add the pre-prepared oil phase, increase the stirring speed to 400r / min, and stir After 15 minutes, raise the temperature to 75°C and keep it warm for 2 hours; then raise the temperature to 80°C and keep it warm for 1-2 hours; finally raise the temperature to 90°C-95°C and keep it warm for 4 hours.
[0030] Af...
Embodiment 2
[0039] (1) Aggregation:
[0040] (1) Preparation of the water phase: 243.94ml of 2.5% polyvinyl alcohol (PVA) solution, 63.36ml of gelatin solution with a mass fraction of 2%, 9.5g of tricalcium phosphate, 3.17g of sodium chloride, and a mass fraction of 1‰ Mix 9.5ml of methylene blue solution and 0.16g of EDTA evenly and set aside.
[0041] (2) Preparation of the oil phase: Mix 80mL of styrene, 8mL of divinylbenzene, 0.9g of benzoyl peroxide and 70.4mL of liquid paraffin for later use.
[0042] (3) Operation process: Add the water phase to a 500ml three-neck flask with stirring, condenser, and thermometer, and stir at 200r / min. When the water bath is heated to 60°C, add the pre-prepared oil phase, increase the stirring speed to 400r / min, and stir After 15 minutes, raise the temperature to 75°C and keep it warm for 2 hours; then raise the temperature to 80°C and keep it warm for 1-2 hours; finally raise the temperature to 90°C-95°C and keep it warm for 4 hours. After the rea...
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