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During the production of acrylic acid and its esters, a large amount of high-concentration wastewater containing organic acids, aldehydes, polymers, and various by-products is generated. This type of wastewater is characterized by high COD, poor biodegradability, strong acidity, and high…

H-Acid (1-amino-8-naphthol-3,6-disulfonic acid) is a key intermediate used in the production of acid dyes, direct dyes, and reactive dyes for wool and cotton textile dyeing. However, the H-acid wastewater generated during the crystallization mother liquor stage has long been one…

Copper, nickel, and cobalt are core metals for strategic industries such as new energy batteries, high-temperature alloys, and magnetic materials. With the explosive growth of the new energy vehicle and energy storage markets, demand for high-purity nickel, cobalt, and copper…

Driven by the global “dual carbon” goals and increasingly stringent environmental regulations, industries such as chemicals, hydrometallurgy, and pharmaceutical intermediates are undergoing a profound green and low-carbon transformation. As a core separation unit operation, liquid-liquid extraction plays a decisive role…

As the global energy transition accelerates, vanadium—often referred to as the “vitamin of metals” and the “MSG of modern industry”—is experiencing unprecedented demand growth. In addition to its indispensable role in steelmaking, chemicals, aerospace, and pharmaceuticals, vanadium redox flow batteries…

In the fields of coal coking, BTX (benzene, toluene, and xylene) production, and fine chemicals manufacturing, BP wastewater has long been a challenging issue for environmental engineers. High concentrations of phenols, aromatic amines, sulfur-containing organic compounds, and ammonia nitrogen make…