company news about Liquid Polyaluminum Chloride: A Versatile Agent in Water Treatment

In recent news, liquid polyaluminum chloride (PAC), a chemical compound with a chemical formula of AlCl3, has emerged as a crucial agent in various water treatment applications. This colorless or light yellow liquid, soluble in water, alcohols, and ethers, boasts remarkable chemical stability and a wide range of utilities, making it a significant player in the environmental protection sector.

PAC liquid is known for its strong corrosion resistance and high hygroscopicity, which means it can quickly absorb moisture from its surroundings. Its appearance, typically as a clear liquid without particles or precipitates, serves as an important indicator of its quality. Any particles or precipitates could indicate impurity or improper storage. The humidity level of PAC should generally be maintained below 80% to ensure optimal performance.

In the realm of water treatment, PAC liquid is extensively used for treating domestic drinking water, industrial water supply, oilfield reinjection water, circulating cooling water, and various types of wastewater, including municipal sewage, oily wastewater, printing and dyeing wastewater, papermaking wastewater, and steel plant wastewater for decolorization. Its ability to effectively remove suspended solids, color, chemical oxygen demand (COD), biological oxygen demand (BOD), and heavy metal ions such as arsenic and mercury makes it indispensable in the purification process.

Moreover, PAC liquid finds applications in papermaking as a sizing and precipitating agent, in sugar refining as a decolorizing and clarifying agent, and in various other industries such as tanning, pharmaceuticals, cosmetics, and casting. Its versatility extends to the recovery of useful substances from industrial wastewater and waste residues, enhancing the settlement of coal powder in coal washing wastewater, and recovering starch in the starch manufacturing industry.

The preparation methods of PAC liquid are diverse, encompassing acid, alkali, neutralization, pyrolysis, gelation, electrolysis, galvanic cell, and membrane processes. Among these, the acid method, which involves dissolving aluminum-containing raw materials in hydrochloric acid and then polymerizing under controlled conditions, is widely adopted due to its rapid reaction speed, low equipment investment, simplicity, and ease of operation. However, this method may result in higher impurity levels, especially metal content, and requires careful handling due to safety concerns associated with hydrogen, hydrochloric acid, steam, and dust emissions.

The market for PAC liquid is experiencing growth due to increasing environmental awareness and stricter regulatory requirements for water treatment. According to recent market research, the size of the PAC industry in China was approximately 3.4 billion yuan in 2023, with a production and demand volume of approximately 2.202 million tons and 2.150 million tons, respectively. This growth is driven by the expansion of urbanization, the rising demand for municipal wastewater treatment, and the increasing need for clean water in water treatment plants.

With its superior flocculation and precipitation capabilities, wide pH range applicability, and low corrosion to piping equipment, PAC liquid is poised to play a pivotal role in the future of water treatment. As research and technology continue to advance, the applications and effectiveness of PAC liquid are expected to expand, further solidifying its position as a key agent in environmental protection and water purification.

In summary, liquid polyaluminum chloride, with its diverse applications and significant contributions to water treatment, is not only a crucial component in ensuring clean and safe water but also a testament to the ongoing advancements in environmental technology.