Current Location： Home > News > Chemical Knowledge > Production and manufacturing method and process of polyaluminium ferric chloride

[Chemical Knowledge]：Production and manufacturing method and process of polyaluminium ferric chloride

Read： 666 Time：13months ago Source：Transform the World with Simplicity

Polyaluminum ferric chloride (PAFC) is an inorganic polymer coagulant, which is widely used in water treatment, chemical industry, papermaking, medicine and other fields. In the field of chemical production raw materials, the manufacturing methods of polyaluminum ferric chloride mainly include acid method, alkali method and neutralization method. This article will detail these manufacturing methods and their advantages and disadvantages.

1. 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 polymeric aluminum ferric chloride. The specific steps are as follows:

1. a certain proportion of hydrochloric acid, sulfuric acid and other inorganic acids are added into the reaction kettle.
2. Add aluminum salt, iron salt, such as aluminum sulfate, ferrous sulfate, etc., to react with acid to generate polymeric aluminum ferric chloride.
3. Control the reaction temperature and pH value to polymerize the product under certain conditions.
4. After the reaction, solid-liquid separation is carried out to obtain polyaluminum ferric chloride product. The advantages of

acid method for manufacturing polymeric aluminum ferric chloride are simple process, convenient operation and stable product quality. However, this method needs to use a large amount of acid, the cost is high, and the generated waste liquid contains a large amount of acid and metal ions, which has certain pollution to the environment.

2. 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 polymeric aluminum ferric chloride. The specific steps are as follows:

1. a certain proportion of sodium hydroxide, potassium hydroxide and other inorganic alkali into the reaction kettle.
2. Add aluminum salt, iron salt, such as aluminum chloride, ferrous chloride, etc., to react with alkali to generate polymeric aluminum ferric chloride.
3. Control the reaction temperature and pH value to polymerize the product under certain conditions.
4. After the reaction, solid-liquid separation is carried out to obtain polyaluminum ferric chloride product. The advantage of

alkali method for manufacturing polymeric aluminum ferric chloride is that it can reduce the amount of acid and reduce the production cost. However, this method requires the use of a large amount of alkali, and the resulting waste liquid contains a large amount of alkali and metal ions, and also requires treatment.

3. neutralization method

neutralization method is to use acid and alkali as raw materials, through the neutralization reaction to generate polymeric aluminum ferric chloride. The specific steps are as follows:

1. a certain proportion of hydrochloric acid and sodium hydroxide are added into the reaction kettle, and the reaction generates sodium chloride and water.
2. In the reaction process, aluminum salt and iron salt are added to react with sodium chloride and water to form polyaluminum ferric chloride.
3. Control the reaction temperature and pH value to polymerize the product under certain conditions.
4. After the reaction, solid-liquid separation is carried out to obtain polyaluminum ferric chloride product. The advantage of manufacturing polymeric aluminum ferric chloride

neutralization method is that it can reduce the amount of acid and alkali, reduce the production cost, and reduce the discharge of waste liquid. However, this method requires precise control of reaction conditions and raw material ratios to ensure product quality and yield.

To sum up, acid method, alkali method and neutralization method are all methods for manufacturing polyaluminum ferric chloride, and each method has its advantages and disadvantages. When choosing a manufacturing method, you should consider comprehensively according to the actual situation and choose the most suitable method. At the same time, attention should be paid to environmental protection and safe production during the production process, and relevant laws, regulations and standard requirements should be observed.

Previous： Manufacturing method and process flow of tin tetrachloride

Next： Production method and process of isocyanate

News Categories