Polymerized Aluminum Ferric Chloride (PAFC) is a kind of inorganic polymer coagulant, which is widely used in the fields of water treatment, chemical industry, papermaking, medicine and so on. In the field of raw materials for chemical production, the manufacturing methods of polymerized aluminum ferric chloride mainly include acid method, alkali method and neutralization method. This article will introduce these manufacturing methods and their advantages and disadvantages in detail.
I. Acid method
Acid method is to use hydrochloric acid, sulfuric acid and other inorganic acids as raw materials, and aluminum salt, iron salt reaction to generate polymerized aluminum iron chloride. The specific steps are as follows:
1. Add a certain proportion of hydrochloric acid, sulfuric acid and other inorganic acids into the reactor.
2. Add aluminum salt and iron salt, such as aluminum sulfate and ferrous sulfate, to react with the acid to generate polymerized aluminum iron chloride.
3. Control the reaction temperature and pH to make the product polymerize under certain conditions.
4. At the end of the reaction, solid-liquid separation is carried out to obtain polymerized aluminum iron chloride products. The advantages of
acid method of manufacturing polymerized aluminum iron chloride are simple process, convenient operation and stable product quality. However, the method requires the use of a large number of acids, the cost is high, and the resulting waste liquid contains a large number of acids and metal ions, a certain degree of pollution of the environment.
Second, alkali method
Alkali method is to use sodium hydroxide, potassium hydroxide and other inorganic alkali as raw materials, and aluminum salt, iron salt reaction to generate polymerized aluminum iron chloride. The specific steps are as follows:
1. Add a certain proportion of sodium hydroxide, potassium hydroxide and other inorganic bases into the reactor.
2. Add aluminum salt and iron salt, such as aluminum chloride and ferrous chloride, to react with alkali to generate polymerized aluminum iron chloride.
3. Control the reaction temperature and pH value, so that the product is polymerized under certain conditions.
4. After the end of the reaction, solid-liquid separation is carried out to obtain polymerized aluminum iron chloride products.
The advantage of the alkali method of manufacturing polymerized aluminum iron chloride is that it can reduce the amount of acid and lower the production cost. However, the method requires the use of a large amount of alkali, and the resulting waste liquid contains a large number of alkali and metal ions, which also need to be treated.
III. Neutralization method
Neutralization method is to use acid and alkali as raw materials to generate polymerized aluminum iron chloride by neutralization reaction. The specific steps are as follows:
1. Add a certain proportion of hydrochloric acid and sodium hydroxide into the reactor to generate sodium chloride and water by reaction.
2. Add aluminum salt and iron salt during the reaction process, so that they react with sodium chloride and water to generate polymerized aluminum iron chloride.
3. The reaction temperature and pH are controlled so that the product is polymerized under certain conditions.
4. At the end of the reaction, solid-liquid separation is carried out to obtain polymerized aluminum iron chloride products.
The advantage of the neutralization method for manufacturing polymerized aluminum iron chloride is that it can reduce the amount of acid and alkali, lowering the cost of production, while reducing the amount of waste liquid discharged. However, the method requires precise control of the reaction conditions and the ratio of raw materials to ensure product quality and yield.
In summary, acid method, alkali method and neutralization method are all methods for manufacturing polymerized aluminum iron chloride, and each method has its advantages and disadvantages. When choosing the manufacturing method, comprehensive consideration should be made according to the actual situation and the most suitable method should be chosen. At the same time, attention should be paid to environmental protection and safe production in the manufacturing process, and relevant laws and regulations and standard requirements should be observed.
