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In industries such as fine chemicals, pharmaceutical intermediates, and new energy materials, three-stage countercurrent washing has become a mainstream process choice due to its advantages of high washing efficiency, improved water utilization, and thorough impurity removal. Its core objective is…

N-Methyl-2-pyrrolidone (NMP) is a high-performance organic solvent widely used in industries such as lithium batteries, polymer manufacturing, electronic materials, and lubricating oil refining. However, NMP is completely miscible with water in any proportion and features a high boiling point and…

With the rapid development of strategic emerging industries such as new energy, electronic information, and high-end manufacturing, the strategic importance of rare metals such as lithium, cobalt, nickel, rubidium, and cesium is becoming increasingly prominent. How to efficiently, cleanly, and…

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

Importance and Challenges of Rubidium and Cesium Extraction Rubidium and cesium are important rare and valuable metal resources, widely used in strategic fields such as aerospace, pharmaceuticals, energy, electronic devices, and the chemical industry. The selection of extraction equipment and…

BP wastewater—high-concentration phenolic and aromatic organic wastewater—has long posed a formidable challenge in environmental treatment. It mainly originates from processes such as bisphenol A (BPA) production, pesticide and pharmaceutical intermediate synthesis, and coal tar processing. Its “four highs and one…