Aluminum acetate-aluminum chloride copolymer-ferric chloride composite flocculant and preparation method thereof
A composite flocculant and aluminum chloride technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, sustainable biological treatment, etc., can solve problems such as solution instability, achieve good turbidity reduction effect, and store at room temperature Stable, high-performance results
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preparation example 1
[0035] In a 250ml three-neck flask with stirring, first add 17g of water, place it in a water bath heated at a constant temperature, set the temperature of the water bath to 90°C, and weigh 18g of solid AlCl 3 ·6H 2 O, added to the above-mentioned flask, stirred to dissolve. Take another 6.6g of NaOH solution with a mass concentration of 30%, put it into a constant pressure dropping funnel, and slowly add it dropwise to the solution, controlling the dropping time for 20-40min. Subsequently, 5 g of glacial acetic acid was weighed and added into the flask, and the temperature was kept at 90° C. for 30 min. Continue to drop 3.3g of NaOH solution with a mass concentration of 30wt%, control the dropping time for 10-20min, keep the temperature at 90°C and continue the reaction for 30-60min to obtain a transparent polymeric aluminum acetate-aluminum chloride flocculant aqueous solution, wherein, Al 2 o 3 The content is 7.6%, and the basicity is 41.3%.
preparation example 2
[0037]Add 15g of water to a 250ml three-neck flask with stirring, place it in a constant temperature heating water bath, set the temperature of the water bath to 60°C, and weigh 25g of solid AlCl 3 ·6H 2 O, add to the above-mentioned flask, fully stir to dissolve. Take another 10 g of NaOH solution with a mass concentration of 30%, put it into a constant pressure dropping funnel, and slowly add it dropwise to the solution for 20-40 minutes. Subsequently, 6 g of glacial acetic acid was weighed and added into the flask, and the temperature was kept at 60° C. for 30 min. Continue to drop 5g of NaOH solution with a mass concentration of 30% for 10-20min, keep the temperature at 60°C and continue the reaction for 30-60min to obtain a transparent polymeric aluminum acetate-aluminum chloride flocculant aqueous solution, wherein, Al 2 o 3 The content is 8.7%, and the basicity is 46.5%.
preparation example 3
[0039] Add 15g of water to a 250ml three-neck flask with stirring, place it in a constant temperature heating water bath, set the temperature of the water bath to 80°C, and weigh 25g of solid AlCl 3 ·6H 2 O, add to the above flask, fully stir to dissolve. Another 10g of sodium carbonate was weighed and slowly added into the solution for 20-40min. Subsequently, 8 g of glacial acetic acid was weighed and added into the flask, and the temperature was maintained at 80° C. for 30 min. Then weigh 7g of sodium carbonate, slowly add it into the solution for 10-20min, keep the temperature at 80°C and continue the reaction for 30-60min to obtain a transparent polymeric aluminum acetate-aluminum chloride flocculant aqueous solution, wherein, Al 2 o 3 The content is 9.1%, and the basicity is 48.2%.
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