Preparation method of poly-aluminum calcium chloride
A technology of polyaluminum calcium chloride and calcium chloride, which is applied in the fields of water treatment, printing and dyeing, and papermaking. It can solve the problems of harsh preparation conditions and poor adaptability of PAC, and achieve the effects of improving product application effects, reducing costs, and broadening the scope of raw materials.
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Embodiment 1
[0018] The preparation method of polyaluminum calcium chloride comprises the steps:
[0019] (1) Prepare a mixed solution of aluminum chloride and calcium chloride so that the molar ratio of aluminum chloride and calcium chloride in the solution is 2:1;
[0020] (2) heating the mixed solution treated in step (1) to keep the temperature of the mixed solution at 80°C;
[0021] (3) Slowly add alkali solution to the mixed solution treated in step (2), and calculate the alkali consumption according to the alkalization degree of 80%;
[0022] (4) reacting the mixed solution treated in step (3) for 30 minutes, so that the pH of the mixed solution is 6;
[0023] In order to make the technical effect of the product better, the curing process can also be carried out. The curing time is 15 hours, and the curing temperature is controlled at 80°C. Adding an appropriate amount of the prepared solution product can make the residual turbidity of the simulated sewage as low as 4 NTU.
Embodiment 2
[0025] The steps are the same as in Example 1, except that the parameters involved are different, and the implementation is as follows:
[0026] Prepare a mixed solution of aluminum chloride and calcium chloride, adjust the molar ratio of aluminum chloride to calcium chloride in the solution to 5, the reaction temperature is 60°C, the degree of alkalinity is 70%, the reaction is 45 minutes, the pH is controlled at 5.8, and the aging temperature is 60°C , matured for 24 hours, adding an appropriate amount of the prepared solution product, the residual turbidity of the simulated sewage will be as low as 3 NTU.
Embodiment 3
[0028] The steps are the same as in Example 1, except that the parameters involved are different, and the implementation is as follows:
[0029] Prepare a mixed solution of aluminum chloride and calcium chloride, adjust the molar ratio of aluminum chloride and calcium chloride in the solution to 3, the reaction temperature is 80°C, the degree of alkalinity is 40%, the reaction is 90 minutes, the pH is controlled at 3.5, and the aging temperature is 80°C , matured for 48 hours, adding an appropriate amount of the prepared solution product, the residual turbidity of the simulated sewage will be as low as 1NTU.
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