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Process and equipment for preparing aluminium polychloride

A technology of polyaluminum chloride and aluminum hydroxychloride, which is applied in the direction of aluminum chloride and aluminum halide, can solve the problems of long production cycle, slow reaction speed of hydrochloric acid and aluminum hydroxide, complex production process and production equipment, and achieve Strong sterilization effect

Inactive Publication Date: 2002-11-27
牛程鹏
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  • Abstract
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  • Claims
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Problems solved by technology

The outstanding defect of this method is that it is necessary to use superheated steam to raise the temperature in the reactor to 150-157°C and increase the pressure to 0.27-0.34Mpa, so that hydrochloric acid and aluminum hydroxide can react to form aluminum hydroxychloride; Therefore, its production process and production equipment are relatively complicated.
Moreover, the reaction speed of hydrochloric acid and aluminum hydroxide is quite slow, and it usually takes 4 to 5 hours to complete, so its production cycle is relatively long.

Method used

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  • Process and equipment for preparing aluminium polychloride
  • Process and equipment for preparing aluminium polychloride

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Embodiment Construction

[0018] Such as figure 1 As shown, when using hydrochloric acid and aluminum hydroxide as raw materials to utilize the present invention to produce polyaluminum chloride, at first hydrochloric acid and aluminum hydroxide are fed by hydrochloric acid feeding port 3 and Aluminum hydroxide feeding port 2 is put into reactor 1, wherein the concentration of hydrochloric acid should be greater than or equal to 31%. For accurately controlling the input amount of hydrochloric acid, the hydrochloric acid pump 17 should be used to pump the hydrochloric acid from the hydrochloric acid storage tank 4 into the hydrochloric acid metering cylinder 5 and then put into the reaction kettle 1 through the valve 18 after metering. After closing the feeding port 2 and the feeding port 3, pass circulating hot water into the hot water jacket of the reactor 1 through the circulation inlet 8 and the circulation outlet 9, so that the material in the reactor 1 is maintained at 30-40C. At the same time, c...

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Abstract

A process for preparing aluminium polychloride from hydrochloric acid and aluminium hydroxide includes such steps as blowing appropriate quantity of chlorine gas into the mixed solution of hydrochloric acid and aluminium hydroxide, reaction of chlorine gas on water in the solution to generate hydrochloric acid and hypochlorous acid as catalyst for next reaction, and reaction of hydrochloric acid on aluminium hydroxide to generate aluminium hydroxychloride. Its advantages are simple process and equipment, short period, and high sterilizing, seaweed-killing and decolouring function. The productis an efficient water deaner.

Description

technical field [0001] The invention relates to a method and a device for producing polyaluminum chloride by using hydrochloric acid and aluminum hydroxide as raw materials, in particular to a method and a device for producing polyaluminum chloride under conditions close to normal temperature and normal temperature. Background technique [0002] Press, polyaluminum chloride, also known as basic aluminum chloride or aluminum hydroxychloride, is a hydrolysis product between aluminum hydroxide and aluminum chloride, and its general chemical formula is [Al 2 (OH) n Cl 6-n ] m, wherein m=≤10, n=1~5. Since polyaluminum chloride is a high molecular compound polymerized by hydroxyl bridging, it is very soluble in water and can undergo hydrolysis to produce a series of physical and chemical effects such as coagulation, adsorption, and precipitation; therefore, polyaluminum chloride is often used It is used as a flocculant for purifying drinking water, domestic sewage, industrial w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56
Inventor 牛程鹏
Owner 牛程鹏
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