光纤级四氯化硅精制工艺

Refining process for optical fiber-grade silicon tetrachloride

根据多晶硅产业副产物四氯化硅的组成特性,提出-整套精制工艺流程,可以得到光纤级四氯化硅。对于年产1万t光纤级四氯化硅,对流程中的精馏塔设计差压多效节能精馏方式,装置可以比普通精馏节约50%以上的蒸汽和循环水用量,节能效果明显。

According to the composition and characteristics of silicon tetrachloride,which is a byproduct of polysilicon industry,a complete set of refining process is built to obtain optical fiber-grade silicon tetrachloride.A differential pressure multi-effect energy-saving distillation method is designed for the distillation column in the process.As for a 10,000 tons/year of optical fiber-grade silicon tetrachloride plant,this process can save more than 50%of steam and circulating water compared with ordinary distillation process,showing an obvious energy-saving effect.