Purification process for compounds useful in optical fiber manufacture

摘要

Silicon tetrachloride is processed to ultrahigh purity by subjecting it to a specific succession of purification steps. These steps include the photochlorination of the SiCl4 using a reactor that allows a long residence time for the SiCl4. After photochlorination, highly volatile products such as HCl are removed and the remaining impurities are then separated by a distillation technique.