A kind of preparation method of green high-efficiency composite flocculant
A composite flocculant and high-efficiency technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of unrealistic large-scale industrialization, high production cost, complicated production process of flocculation materials, etc., and achieve the elimination of aluminum salt toxicity , low cost, good flocculation effect
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[0030] Example 1:
[0031] A preparation method of green and efficient composite flocculant, the steps are as follows:
[0032] 1) Weigh 1.5 grams of plant fibrous waste powder, prepare 20 w% sodium hydroxide aqueous solution in a 250ml beaker, slowly add 20ml of this sodium hydroxide solution into the beaker, stir well, and conduct alkalization at 38oC , The time is 60 minutes;
[0033] 2) Prepare an aqueous solution of chloroacetic acid with a concentration of 13 w%, add 25ml of this aqueous solution of chloroacetic acid to the above reaction solution, stir evenly, and perform etherification at a temperature of 80oC for 50 minutes;
[0034] 3) Prepare an aqueous solution of aluminum trichloride with a concentration of 30 w%, add 25ml of this aqueous solution of aluminum trichloride to the above-mentioned reaction solution after alkalization and etherification, stir uniformly, and control the temperature condition to 40oC to carry out the compound reaction. The time is 2 hours to ob...
Example Embodiment
[0035] Example 2:
[0036] A preparation method of green and efficient composite flocculant, the steps are as follows:
[0037] 1) Weigh 3 grams of plant fibrous waste powder, prepare 20 w% sodium hydroxide aqueous solution in a 250ml beaker, slowly add 40ml of this sodium hydroxide aqueous solution into the beaker, fully stir, and alkalize at 30oC , The time is 55 minutes;
[0038] 2) Prepare an aqueous solution of chloroacetic acid with a concentration of 13 w%, add 35ml of the aqueous solution of chloroacetic acid to the above reaction solution, stir evenly, and perform etherification at a temperature of 75oC for 50 minutes;
[0039] 3) Prepare an aqueous solution of aluminum trichloride with a concentration of 40 w%, add 25ml of this aqueous solution of aluminum trichloride to the above-mentioned reaction solution after alkalization and etherification, stir uniformly, and control the temperature condition to 50oC to carry out the compound reaction. The time is 7 hours, and the gr...
Example Embodiment
[0040] Example 3:
[0041] A preparation method of green and efficient composite flocculant, the steps are as follows:
[0042] 1) Weigh 2 grams of plant fibrous waste powder, prepare 18 w% sodium hydroxide aqueous solution in a 250ml beaker, slowly add 40ml of this sodium hydroxide aqueous solution into the beaker, stir well, and carry out alkali at 40oC. The time is 55 minutes;
[0043] 2) Prepare an aqueous solution of chloroacetic acid with a concentration of 14 w%, add 35ml of this aqueous solution of chloroacetic acid to the above reaction solution, stir evenly, and perform etherification at a temperature of 75oC for 50 minutes;
[0044] 3) Prepare an aqueous solution of aluminum trichloride with a concentration of 40w%, add 25ml of this aqueous solution of aluminum trichloride to the above-mentioned reaction solution after alkalization and etherification, stir uniformly, control the temperature condition to 80oC, carry out the compound reaction, and the reaction time It takes ...
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