Preparation process of high concentration polymerized aluminium sulfate flocculant
A polyaluminum sulfate, high-concentration technology, applied in the direction of aluminum sulfate, alkali metal aluminate/aluminum oxide/aluminum hydroxide preparation, chemical instruments and methods, etc. Good control and other issues, to achieve the effect of process simplification and high concentration
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Embodiment 1
[0034] (1) The preparation of stable high-concentration sodium metaaluminate: get 311.88g, the NaOH solution that concentration is 42.25%, join in the there-necked flask that has stirrer and reflux device, add 2.57g sodium gluconate, by stirring completely dissolve. Heat to 100°C, gradually add 185.95g of Al(OH) 3 , the temperature was raised to and maintained at 114°C. Al(OH) 3 After complete dissolution, the solution became clear. Then 8.5 g of sulfonate solution (prepared by adding 1 g of sulfonate to 7.5 g of NaOH with a concentration of 67.49% by mass) was added. After adding the sulfonate solution for 1 min, add 5.10 g of ammonium persulfate solution with a mass percent concentration of 16.7% into the solution. Heating was stopped during the process of adding the ammonium persulfate solution, and after all the ammonium persulfate solution was added, the temperature was raised to 120°C and kept for 50 minutes. Then get sodium metaaluminate product.
[0035](2) Polym...
Embodiment 2
[0037] (1) The preparation of stable high-concentration sodium metaaluminate: get 311.88g, the NaOH solution that concentration is 45.27%, joins in the there-necked flask that has stirrer and reflux device, adds 2.57g sodium gluconate, by stirring completely dissolve. Heat to 100°C, gradually add 184.01g of Al(OH) 3 , the temperature was raised to and maintained at 114°C. Al(OH) 3 After complete dissolution, the solution became clear. Then 8.5 g of the sulfonate solution were added. After adding the stabilizer solution for 1 min, add 7.04 g of ammonium persulfate solution with a mass percent concentration of 16.7% into the solution. Heating was stopped during the process of adding the ammonium persulfate solution, and after all the ammonium persulfate solution was added, the temperature was raised to 120°C and kept for 45 minutes. Then get sodium metaaluminate product.
[0038] (2) Polymerization: 8.16 g of sodium silicate was dissolved in 28.5 g of 8.77% sodium carbonat...
Embodiment 3
[0040] (1) The preparation of stable high-concentration sodium metaaluminate: get 311.88g, the NaOH solution that concentration is 47.15%, joins in the there-necked flask that has stirrer and reflux device, adds 2.57g sodium gluconate, by stirring completely dissolve. Heat to 100°C, gradually add 186.55g, the temperature rises to and remains at 114°C. Al(OH) 3 After complete dissolution, the solution became clear. Then 8.5 g of stabilizer solution were added. After adding the sulfonate solution for 3 minutes, add 4.5 g of ammonium persulfate solution with a mass percent concentration of 16.7% into the solution. Heating was stopped during the process of adding the ammonium persulfate solution, and after all the ammonium persulfate solution was added, the temperature was raised to 120°C and kept for 48 minutes. Then get sodium metaaluminate product.
[0041] (2) Polymerization: 6.67g of sodium silicate was dissolved in 28.5g of 8.77% sodium carbonate solution to obtain a mi...
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