Advantages and disadvantages of aluminum chloride preparation method

The advantages and disadvantages of the classification methods according to raw materials such as aluminum method and active aluminum hydroxide method 

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●Metal aluminum method: the reaction speed is relatively fast, and a certain amount of Polyaluminum Chloride can be obtained in a short time. Moreover, aluminum metal is relatively widely available, which provides a certain guarantee for large-scale production.

●Active aluminum hydroxide method: Because of the high purity of aluminum hydroxide powder, the content of heavy metals and other toxic substances synthesized by this method is low, which is suitable for water treatment with high requirements, such as Drinking Water Treatment.

●Aluminum oxide method: raw materials containing aluminum oxide, such as trisodium alumina, bauxite, kaolin, coal gangue and so on, are abundant in source and low cost, which can reduce the production cost.

●Aluminum chloride method: This method is the most widely used, the process is relatively mature, and the operation is relatively simple.

 shortcoming

●Metal aluminum method: the price of aluminum metal is relatively high, which will increase the production cost. In addition, flammable and explosive gases such as hydrogen may be produced in the reaction process, which has certain safety risks.

●Active aluminum hydroxide method: Generally, it adopts the production process of heating and pressurized acid dissolution, which requires specific equipment and conditions, increasing the complexity and cost of production. Moreover, the salt base degree of the produced polyaluminum chloride is low, and additional processes may be required to adjust.

●Aluminum oxide method: The production process is relatively complex, and it usually takes multiple steps to get polyaluminum chloride, which increases the production time and cost.

●Aluminum chloride method: It may be affected by the quality of aluminum chloride raw materials. If there are more impurities in the raw materials, it will affect the quality of the final product.

The advantages and disadvantages of acid method, alkali method, neutralization method and other process classification methods

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●Acid method: the reaction speed is fast, the investment equipment is less, the process is simple, the operation is convenient, the product base and alumina content are high, it is widely used in China.

●Alkali method: the product has better color appearance and less water insoluble substances.

●Neutralization method: the aluminum content and salinity of the product are relatively high.

 shortcoming

●Acid method: the equipment is seriously corroded, the products produced have more impurities, especially the heavy metal content is easy to exceed the standard, and the product quality is unstable.

●Alkali method: high sodium chloride content, high raw material consumption, low alumina content in solution, large industrial production cost.

●Neutralization method: the process is relatively complex, which requires the preparation of aluminum chloride and sodium aluminate solutions respectively, and then mixed neutralization, which increases the production steps and costs.

Advantages and disadvantages of other preparation methods

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●Original battery method: it is an improved process of aluminum ash acid dissolution, which can improve the shortcomings of the traditional acid dissolution method to a certain extent.

●Boiling pyrolysis: the process is relatively simple, and the product can be obtained quickly through pyrolysis and polymerization.

●Spray drying method: It has strong absorption, rapid and large flocculation, low turbidity, and excellent dehydration. For the same water quality, spray-dried products require less input compared to other methods, especially for highly polluted water, only half the amount needed for drum-dried products is required. This not only reduces labor intensity but also lowers customer costs. Moreover, overuse does not cause pollution, preventing accidents and ensuring the safety of drinking water quality.

 shortcoming

●Primary battery method: there are certain requirements for equipment and electrode materials, which increases the cost of equipment.

●Boiling pyrolysis: it needs to consume a certain amount of energy to maintain the pyrolysis temperature, and the cost is high.

●Spray drying: large equipment investment, high requirements for operating conditions.