Patent ID: 9321653
Filing Date: 2016-04-26
CPC Classification: C01B

Claim Text:
1. A process for producing trichlorosilane, including, independently from each other, a first production process for forming said trichlorosilane by reacting metallic silicon with hydrogen chloride and a second production process for forming said trichlorosilane by reacting metallic silicon with tetrachlorosilane and hydrogen; wherein said trichlorosilane and other chlorosilane compounds are separated by condensation from trichlorosilane-containing gases formed by reaction in said first production process, and waste gases from which said trichlorosilane and other chlorosilane compounds have been separated by condensation are continuously fed without being refined as a hydrogen source to the second production process, wherein the metallic silicon is used in the first production process in an amount not less than twice as much as the amount of the metallic silicon used in the second production process.