Rear-earth poly aluminum chloride and production process thereof
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A technology of polyaluminum chloride and polyalumina, applied in the direction of aluminum chloride, aluminum halide, etc., can solve the problem of low removal rate and achieve the effect of high cleaning rate in sewage
Inactive Publication Date: 2014-02-05
乔占印
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[0003] Polyaluminium chloride is widely used as a sewage treatment agent, mainly used for the purification of high turbidity tap water and reservoir water in dry seasons. It has the characteristics of large flocs and fast purification, but its removal rate is only 50-60%.
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Embodiment 1
[0009] (1) Put 0.8 tons of food-grade hydrochloric acid with a mass concentration of 10-30% into the reactor and heat up to 60-130°C, slowly add 0.3 tons of aluminum hydroxide powder and 3 kg of lanthanum oxide (La 2 o 3 ),
[0010] (2) React at 120°C±10°C for 3-6 hours,
[0011] (3), the above reaction solution was left to stand for 2-4 hours to make liquid lanthanum rare earth polyaluminium chloride,
Embodiment 2
[0013] (1) Put 1 ton of food-grade hydrochloric acid with a mass concentration of 10-30% into the reactor and heat up to 60-130°C, slowly add 04 tons of aluminum hydroxide powder and 5 kg of lanthanum chloride,
[0014] (2) React at 120°C±10°C for 3-6 hours,
[0015] (3), the above reaction solution was left to stand for 2-4 hours to make liquid lanthanum rare earth polyaluminium chloride,
Embodiment 3
[0017] (1) Put 1.4 tons of food-grade hydrochloric acid with a mass concentration of 10-30% into the reactor and heat up to 60-130°C, slowly add 0.6 tons of aluminum hydroxide powder and 8 kg of lanthanum sulfate,
[0018] (2) React at 120°C±10°C for 3-6 hours,
[0019] (3), the above reaction solution was left to stand for 2-4 hours to make liquid lanthanum rare earth polyaluminium chloride,
[0020] The addition amount of above-mentioned three kinds of lanthanum rare earths can also be different, and its removal rates are slightly different. Due to the use of relatively low-priced lanthanide rare earths, its cost is not high, and its cost performance has a significant advantage.
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Abstract
The invention discloses rear-earth poly aluminum chloride. The rear-earth poly aluminum chloride comprises poly aluminum chloride, and the rear earth is one of lanthanum oxide, lanthanum chloride and lanthanum sulfate. A process of preparing the rear-earth poly aluminum chloride according to the claim 1 comprises the following steps: (1), placing 0.8-1.4 parts by weight of 10-30wt% food-grade salt into a reaction kettle, slowly adding 0.3-0.6 parts by weight of aluminum hydroxide powder and 0.003-0.008 parts by weight of lanthanum-series rear earth while heating up to 60-130 DEG C; (2), heating up the reaction kettle to 120+/-10 DEG C to react for 3-6 hours; (3), standing for 2-4 hours after the reaction is ended to prepare liquid poly aluminum chloride. The lanthanum ear earth is one of lanthanum oxide, lanthanum chloride and lanthanum sulfate. The rear-earth poly aluminum chloride disclosed by the invention has the remarkable advantage of being in high in wastewater purifying rate.
Description
[0001] Technical field: [0002] The invention relates to a sewage treatment agent, in particular to a rare earth polyaluminum chloride and its production process. Background technique: [0003] Polyaluminium chloride is widely used as a sewage treatment agent, mainly used for the purification of high turbidity tap water and reservoir water in dry seasons. It has the characteristics of large flocs and fast purification, but its removal rate is only 50-60%. . Invention content: [0004] The object of the present invention is to provide a kind of rare earth polyaluminum chloride with high sewage purification rate and its production process. [0005] The technical solution for realizing the object of the present invention is a rare earth polyaluminum chloride, including polyaluminum chloride, characterized in that: the rare earth is one of lanthanum oxide, lanthanum chloride and lanthanum sulfate. A process for preparing the rare earth polyaluminum chloride according to cla...
Claims
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