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A kind of preparation method of polyaluminum chloride

A technology of polyaluminum chloride and mixed solution, which is applied in the fields of aluminum chloride, aluminum halide, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of high production cost, high impurity content, and low active ingredient, and achieve product quality High, high product purity, the effect of improving the dissolution rate

Inactive Publication Date: 2019-09-13
SICHUAN QILI LVYUAN WATER TREATMENT TECH CO LTD
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Problems solved by technology

[0005] This application provides a method for preparing polyaluminum chloride, which is used to solve the technical problems of high impurity content, low active ingredient or high production cost in the production process of polyaluminum chloride in the prior art

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  • A kind of preparation method of polyaluminum chloride

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Embodiment 1

[0036] Embodiment 1 of the present application provides a method for preparing polyaluminum chloride, the method comprising:

[0037] Step 101: adding 31% by weight hydrochloric acid and 99.5% by weight aluminum hydroxide to a reaction tank or kettle at a ratio of 1:0.15 to 0.25 by weight to obtain a mixed solution;

[0038] Step 102: Add the first weight of calcium aluminate powder to the mixed solution under stirring conditions, so that the temperature of the mixed solution after adding the calcium aluminate powder is greater than or equal to 100°C within the first preset time period, and after fully reacting obtaining a first reaction material;

[0039] Step 103: adding 0.8 to 1 times the weight of water to the first reaction material to obtain a reaction solution;

[0040] Step 104: Adding a second weight of calcium aluminate powder to the reaction solution so that the temperature of the reaction solution after adding the calcium aluminate powder is greater than or equal ...

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Abstract

The invention discloses an aluminium polychlorid preparation method. According to the invention, during a process to obtain the aluminium polychlorid by a reaction of hydrochloric acid and aluminium hydroxide, and an exothermic reaction of calcium aluminate powder and hydrochloric acid is used for increasing the reaction temperature of the materials, so that the technical effects of energy savingand emission reduction can be achieved. The raw materials in the method are hydrochloric acid, aluminium hydroxide, and calcium aluminate powder, the impurity content is little, almost no industrial waste residue is generated during production, the purity of the product is high, and the method has the technical effects of high quality and no pollution of the product. The technical scheme is characterized in that acidity of the reaction materials at each phase is adjusted by using the calcium aluminate powder, and aluminium hydroxide and the calcium aluminate powder are reacted at optimum acidity, so that dissolution rate of alumina in aluminium hydroxide and the calcium aluminate powder is greatly increased, and the method has the technical effects of reducing raw material consumption andreducing production cost.

Description

technical field [0001] The invention relates to the technical field of chemical preparations, in particular to a preparation method of polyaluminum chloride. Background technique [0002] Polyaluminium chloride is a kind of water purifying agent with excellent performance. It has the characteristics of fast hydrolysis speed, strong adsorption capacity, large alum flower formation, fast precipitation speed, and low turbidity of effluent. It is used in domestic drinking water, industrial water, sewage treatment, etc. It has been widely used in the field and is currently the water treatment agent with a large amount in the water treatment industry. [0003] At present, there are two main methods for preparing polyaluminum chloride. One is the bauxite method. This method has low investment, simple production process and low production cost. However, due to the high impurity content and low active ingredient content in bauxite, The quality of the produced polyaluminum chloride i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/56C02F1/52
Inventor 穆璠
Owner SICHUAN QILI LVYUAN WATER TREATMENT TECH CO LTD
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