A Method for Selectively Removing Chloride Ion Using Ion Imprinted Polymer
A technology of ion imprinting and polymer, applied in the field of water treatment, can solve problems such as corrosion of pipelines and equipment, achieve low investment and operating costs, and simple operation and management
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Embodiment 1
[0022] (1) Pretreatment of orange peel cellulose: Take 10 grams of orange peel powder and 200ml of ethanol solution (80% concentration), extract it in a water bath at 80°C for 4 hours, extract the flavonoids from the mother liquor, and recycle it; add 100ml of the reaction product NaOH solution (0.1mol / L), stirred for 1 hour, separated by a centrifuge, then added 100ml of isopropanol solution (20% concentration), soaked overnight, and the soaked solution was separated by a centrifuge;
[0023] (2) Hydroxymethylation: Pour the product after the above post-pretreatment into a dry three-necked flask equipped with a mechanical stirrer and a condenser, adjust the pH value to 7 with dilute hydrochloric acid solution, and then add 1.67g mass fraction of 36% HCHO aqueous solution, hydroxymethylation reaction occurred at 25°C for 3 h;
[0024] (3) Grafting reaction: According to n (HCHO): n (acrylamide): n (thiosemicarbazide) = 1:1:1, weigh acrylamide and thiosemicarbazide and add them...
Embodiment 2
[0028] (1) Orange peel cellulose pretreatment: Take two flasks each, take 10 grams of orange peel powder and 200ml of ethanol solution (80% concentration), extract in a water bath at 80°C for 4 hours, and extract flavonoids from the mother liquor Recover and apply; add 100ml of NaOH solution (0.1mol / L) to the reaction product, stir for 1 hour, separate with a centrifuge, add 100ml of isopropanol solution (20% concentration), soak overnight, and use a centrifuge to soak the solution separation;
[0029] (2) Hydroxymethylation: Pour the product after the above post-pretreatment into a dry three-necked flask equipped with a mechanical stirrer and a condenser, adjust the pH value to 7 with dilute hydrochloric acid solution, and then add 1.67g mass fraction of 36% HCHO aqueous solution, hydroxymethylation reaction occurred at 25°C for 3 h;
[0030] (3) Grafting reaction: According to n (HCHO): n (acrylamide): n (vinylimidazole) = 1:1:1, weigh acrylamide and vinylimidazole and add ...
Embodiment 3
[0034] In a 5000mL reaction vessel, measure 4000mL of chlorine-containing wastewater with a chloride ion concentration of 5000mg / L, add a certain amount of the ion-imprinted polymer (80g) prepared in Example 1, react for 8 hours, filter and recover the ion-imprinted polymer, The concentration of chloride ions finally reaches below 100 mg / L, meeting the requirements for chloride ions in recycled water quality.
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Abstract
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