Special poly aluminum chloride for municipal water supply and preparation method of poly aluminum chloride
A polyaluminum chloride, water supply technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of easy occurrence of gel, affecting dissolution, etc., and achieve the effect of improving water quality and excellent turbidity
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Embodiment 1
[0020] Embodiment 1: the preparation method of a kind of special polyaluminum chloride for municipal water supply of this example, its steps are:
[0021] Weigh 100 grams of hydrochloric acid with a concentration of 25%, add 18 grams of aluminum hydroxide, which contains Al 2 o 3 % is 64% (m / m), 100-120 0 C stirred and reacted for 2 hours to obtain 2 o 3 It is 9.2% (m / m) aluminum chloride liquid, add 18 grams of calcium aluminate powder in above-mentioned aluminum chloride liquid, the Al of this calcium powder 2 o 3 The % is 50% (m / m), the total calcium is 32% (m / m), the water is 17 grams, and it is kept at 80-120 0 C was reacted for 1 hour to obtain 2 o 3 is 12.0% (m / m); the basicity is 65%; the density is 1.26 g / ml polyaluminum chloride; add 17 grams of calcium aluminate powder to the above polyaluminum chloride liquid, and keep it at 80-100 0 After C reacted for 30 minutes, 63 grams of water was added to obtain 10.1% (m / m) containing Al2O3; the basicity was 90%; the...
Embodiment 2
[0026] Embodiment 2: the preparation method of a kind of special polyaluminum chloride for municipal water supply of this example, its steps are:
[0027] Weigh 100 grams of electronic by-product hydrochloric acid with a concentration of 15%, and Al in this hydrochloric acid 2 o 3 % is 3.5%, the total acidity is 15%, heated to 50 0 C, add 17 grams of calcium aluminate powder, the calcium aluminate powder contains Al 2 o 3 % is 50% (m / m), and the total calcium content is 32% (m / m). Stir the reaction for 2 hours to obtain Al-containing 2 o 3 9.1% (m / m), salinity 70%; polyaluminum chloride liquid with a density of 1.22 g / ml, add 7 grams of calcium aluminate powder to the above liquid, and keep it at 80-100 0 After C reacted for 45 minutes, add 30 grams of water to obtain 2 o 3 It is 7.0% (m / m); the salinity is 88%, the density is 1.19 g / ml special polyaluminum chloride for municipal water supply.
[0028] The chemical reaction formula is:
[0029] 1. HCl + AlCl 3 +Al 2...
Embodiment 3
[0031] Embodiment 3: the preparation method of a kind of special polyaluminum chloride for municipal water supply of this example, its steps are:
[0032] Weigh 100 grams of hydrochloric acid with a concentration of 31%, add 22 grams of aluminum hydroxide, which contains Al 2 o 3 % is 64% (m / m), 100-120 0 C stirred and reacted for 2 hours to obtain 2 o 3 It is 11.5% (m / m) aluminum chloride liquid, add calcium aluminate powder 23 grams in above-mentioned aluminum chloride liquid, the Al of this calcium powder 2 o 3 % is 50% (m / m), total calcium is 32% (m / m), water is 38.5 grams, and it is kept at 80-120 0 C was reacted for 1-2 hours to obtain 2 o 3 is 12.5% (m / m); the basicity is 65%; the density is 1.28 g / ml polyaluminum chloride; add 12 grams of calcium aluminate powder to the above polyaluminum chloride liquid and keep it at 80 0 After reacting above C for 40 minutes, add 53 grams of water to obtain 2 o 3 10.5% (m / m); salinity 80%; density 1.23 g / ml high-efficien...
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