Method for producing polyaluminium chloride

A technology of polyaluminum chloride and its production method, which is applied in the fields of aluminum chloride, aluminum halide, flocculation/sedimentation water/sewage treatment, etc., and can solve problems such as failure to detect new technical solutions

Active Publication Date: 2009-09-16
浙江嘉灵环保科技有限公司
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After being searched by the national first-level search unit, no new technical solutions were detected

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  • Method for producing polyaluminium chloride

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Embodiment 1

[0029] Embodiment 1, with Al 2 o 3 Mass content is 10% total output 1 ton of liquid finished product meter, get polyaluminum chloride mother liquor 150kg, put into reaction vessel, add calcium aluminate powder (Al 2 o 3 Content 51~52%, acid-dissolving method) 170kg, then at normal temperature, add 110.5kg (mass ratio 0.65) of industrial hydrochloric acid converted into 100% mass concentration, when the temperature reaches 55 ℃, gradually add water 569.5kg, control the flow meter The temperature of the liquid in the reaction vessel is kept between 87°C and 100°C, and the liquid and slag are separated after 2 hours. This example adopts the pressure filtration method to obtain 980kg of finished product liquid and 20kg of waste residue. The finished liquid complies with GB15892-2003 standard.

Embodiment 2

[0030] Example 2, with Al 2 o 3 Mass content is 10% total output 1 ton of liquid finished product meter, get polyaluminum chloride mother liquor 400kg, put into reaction vessel, stir and add calcium aluminate powder (Al 2 o 3 Content 51~52%, acid-dissolving method) 126kg, normal temperature is added and converted into mass concentration and is 104.6kg (mass ratio 0.83) of industrially synthesized synthetic hydrochloric acid, when temperature reaches 55 ℃, add water 369.4kg, control flow rate requirement reaction solution temperature In the range of 87-100°C, after 2 hours, the liquid and slag will be separated. In this example, centrifugation is used to obtain 985kg of finished product liquid and 15kg of waste residue. The finished liquid complies with GB15892-2003 standard.

Embodiment 3

[0031] Embodiment 3, according to the above example, get mother liquor 200kg, put into reaction tank, stir and add calcium aluminate powder 164kg next time, normal temperature is added and converted into mass concentration and is 100% industrial synthetic hydrochloric acid 114.8kg (mass ratio 0.70), when reaction in the tank When the temperature reaches 60°C, add 521.2kg of water, and control the flow so that the temperature in the pool is within the range of 87-100°C. After 2.0 hours, the liquid and slag were separated. This example adopts the filter press method to obtain 980 kg of finished product liquid and 20 kg of waste residue. The finished liquid complies with GB15892-2003 standard.

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Abstract

The invention relates to a method for producing polyaluminium chloride as a drinking water treating agent, which uses 1 ton of liquid product which contains 10 percent of Al2O3 in mass content as a mother solution of which total output is 15 to 40 percent in percentage by mass. The mother solution is added with 200 to 210 kilograms of calcium aluminate powder in one step under a stirring state, wherein the content of the Al2O3 is 51 to 52 percent. Under normal temperature, industrial synthetic hydrochloric acid with 100 percent of mass concentration is added into the mother solution, and the weight of the industrial synthetic hydrochloric acid is 0.65 to 0.83 of the calcium aluminate powder. When the temperature is raised to 55 DEG C, 661.8 to 624.9 kilograms of water is added into the mother solution, and the flow is controlled within a reaction temperature of between 87 and 100 DEG C. When the temperature finally does not reach 87 DEG C, steam is supplemented, and water quantity is deducted. When the reaction is carried out for 2 to 3 hours, liquid and slag are separated. The raw material variety of the invention is little, the process flow is short, the reaction is shortened by one third, the harmful substances are controlled in a standard range, the cost is lowered, the waste slag is little, and the obtained product has clear color and good quality.

Description

technical field [0001] In the International Patent Classification, the present invention belongs to the treatment subclass of water, waste water, sewage or sludge, that is, C02F, and particularly relates to a production method of polyaluminum chloride, a treatment agent for drinking water. Background technique [0002] Since ancient times, water treatment methods include natural sedimentation, sand filtration and alum flocculation. In the 1960s, there was a polyaluminum chloride water treatment agent with good performance. The polyaluminum chloride is prepared by reacting aluminum chips or aluminum ash or aluminum slag with hydrochloric acid. In the products produced by this method, there are many impurities and the content of heavy metals exceeds the standard. At the same time, a large amount of flammable and explosive gases such as hydrogen and hydrogen chloride are produced during the production process, so the safety is relatively poor, and large-scale production cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56C02F1/52
Inventor 沈烈翔徐鑫英解望斐沈敬贤
Owner 浙江嘉灵环保科技有限公司
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