High-purity polyaluminum chloride competition eases, industry development prospects are broad

High-purity polyaluminum chloride is a new type of efficient inorganic polymer flocculant, available in liquid and solid forms. The content of aluminum oxide in liquid high-purity polyaluminum chloride is ≥10%, which is colorless and transparent; solid high-purity polyaluminum chloride The aluminum oxide content is ≥30%, and it is a white powder. High-purity polyaluminum chloride has the advantages of high purity, low insoluble matter, and low heavy metal content. The whiteness can reach more than 95%. It is a high-quality and high-end water purification material.

Compared with ordinary polyaluminum chloride, high-purity polyaluminum chloride has low impurity content and high active ingredients. Its production process is also somewhat different from ordinary polyaluminum chloride. At present, my country’s high-purity polyaluminum chloride production processes mainly include direct synthesis method, purification method, electrolysis method, gel method, pyrolysis activation method, membrane method, etc.

The direct synthesis method uses aluminum powder, aluminum hydroxide, crystallized aluminum chloride, etc. as raw materials. The advantages of this method are controllable raw material composition and high product purity; the disadvantages are higher cost and low salt base. The purification method uses aluminum-containing minerals and calcium aluminate as raw materials. The advantage of this method is lower cost; the disadvantage is that the operation is complex and the process flow is long. The electrolysis method uses metal aluminum plates and crystallized aluminum chloride as raw materials. The advantage of this method is that it is simple to operate, easy to control, and has no secondary pollution; the disadvantage is that it consumes high energy. The gel method uses aluminum-containing minerals, sodium hydroxide/sodium carbonate, and hydrochloric acid as raw materials. The advantage of this method is that the product has high purity; the disadvantage is that it consumes a lot of raw materials and has high production costs. The pyrolysis activation method uses crystalline aluminum chloride as the raw material. The advantages of this method are high product purity and simple process operation; the disadvantage is that the equipment is easy to corrode and has high requirements on equipment materials. The membrane method uses aluminum chloride solution and caustic soda as raw materials. The advantage of this method is that the composition of the raw materials is controllable and the purity is high; the disadvantage is that the stability of the membrane is poor.

At present, there are a large number of ordinary polyaluminum chloride manufacturers in my country, while there are relatively few high-purity polyaluminum chloride manufacturers, and industry competition is relatively relaxed. According to the “In-depth Market Research and Investment Strategy of Polyaluminum Chloride Industry 2021-2025” released by the Industrial Research Center, my country’s high-purity polyaluminum chloride industry Aluminum chloride production companies mainly include Chinalco Shandong Co., Ltd., Hainan Yijing Environmental Protection Co., Ltd., Shandong Zhishui Chemical Technology Co., Ltd., Henan Alfok Chemical Co., Ltd., Guangxi Foster Renewable Resources Environmental Protection Technology Co., Ltd., etc. , mainly distributed in Shandong, Henan, Guangxi and other places.

Industrial researchers said that the supply of mid- to low-end industrial-grade polyaluminum chloride in the Chinese market is close to or even reaching saturation, and the number of companies There are many, and internal competition is fierce; as for high-purity polyaluminum chloride, due to the high requirements for impurity control in the production process, production is difficult, and the number of companies is small; the demand for high-purity polyaluminum chloride is superimposed in papermaking, medicine, catalysis, fine chemicals and other industries The volume is increasing, and the high-purity polyaluminum chloride industry has broad development prospects.