Inorganic-organic composite polymer phosphorus removal flocculating agent and preparation method thereof
A composite polymer and flocculant technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water pollutants, etc., can solve the problems of efficient removal of phosphorus in wastewater, achieve large molecular weight, reduce turbidity, The effect of fast settling speed
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[0019] Example 1
[0020] Weigh 10g of polyaluminum chloride with a balance, dissolve it in 200mL of distilled water, and prepare an aqueous solution with a mass concentration of 5%, and then add 2g of silane coupling agent 3-(methacryloyloxy)propyltrimethoxysilane. The reaction was stirred at room temperature for 4 hours. Then add 16g of acrylamide, 8g of 2-acrylamide-2-methylpropanesulfonic acid and 2g of urea, after the polymer monomer is fully stirred and dissolved, adjust the pH to 7.0 with 0.1mol / L hydrochloric acid, and pass nitrogen Deoxidize for 15min, heat up to 55-60°C, add 2 mL of 10% initiator ammonium persulfate solution dropwise with stirring, and react at constant temperature for 4 hours to obtain the target product. The average molecular weight of the target product is measured to be 5.5 million. The target product is granulated and dried to obtain an inorganic-organic composite macromolecule phosphorus removal flocculant.
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[0021] Example 2
[0022] Weigh 10g of polyaluminum chloride with a balance, dissolve it in 200mL of distilled water, and prepare an aqueous solution with a mass concentration of 5%, then add 2.6g of silane coupling agent 3-(methacryloyloxy)propyltrimethoxysilane, The reaction was stirred at room temperature for 5 hours. Then 25g of acrylamide, 8.4g of 2-acrylamide-2-methylpropanesulfonic acid and 2.1g of urea were added, and after the polymer monomer was fully stirred and dissolved, the pH was adjusted to 7.0 with 0.1mol / L hydrochloric acid, and the Pass nitrogen to remove oxygen for 15min, heat up to 60-65°C, add 4.8mL of 10% initiator ammonium persulfate solution dropwise under stirring, and react at constant temperature for 4.5 hours to obtain the target product, and the average molecular weight of the target product is measured to be 7 million. The target product is granulated and dried to obtain an inorganic-organic composite macromolecule phosphorus removal flocculant....
Example Embodiment
[0023] Example 3
[0024] Weigh 10g of polyaluminum chloride with a balance, dissolve it in 200mL of distilled water, and prepare an aqueous solution with a mass concentration of 5%, then add 3.2g of silane coupling agent 3-(methacryloyloxy)propyltrimethoxysilane, The reaction was stirred at room temperature for 6 hours. Then add 32.5g of acrylamide, 8.8g of 2-acrylamide-2-methylpropanesulfonic acid and 2.2g of urea. After the polymer monomer is fully stirred and dissolved, the pH is adjusted to 7.0 with 0.1mol / L hydrochloric acid. And pass nitrogen to deoxygenate for 15min, heat up to 60-65 ℃, add 5.6mL of 10% initiator ammonium persulfate solution dropwise under stirring, and react at constant temperature for 4.5 hours to obtain the target product, and the average molecular weight of the measured target product is 9.5 million . The target product is granulated and dried to obtain an inorganic-organic composite macromolecule phosphorus removal flocculant.
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