Selenium is a technologically important element widely used in semiconductor devices, photoelectric systems, glass production, metallurgy, and catalyst applications. Because selenium is rarely obtained from primary mineral deposits, its industrial production is mainly associated with the processing...

This review examines the current status and future prospects of technical-grade selenium purification technologies based on published scientific literature. The physicochemical principles and technological capabilities of vacuum distillation, fractional crystallization, zone refining, and combined...