Pretty High purity silicon for semiconductors is obtained using the Siemens procedure; the silicon is reacted to make trichlorosilane, and that is initially purified by distillation, then reacted with purified hydrogen on significant purity silicon rods at 1150 oC to produce substantial purity, polycrystalline silicon with hydrochloric acid byproduct. Silica https://garrettsrqnl.blogs100.com/37122839/about-carbide-uses