Quite higher purity silicon for semiconductors is received using the Siemens approach; the silicon is reacted to produce trichlorosilane, which happens to be 1st purified by distillation, then reacted with purified hydrogen on high purity silicon rods at 1150 oC to produce superior purity, polycrystalline silicon with hydrochloric acid byproduct.

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Commercially, silicon is purified by heating sand and carbon in an electric furnace. A molten salt electrolysis process is applied to acquire ultrapure silicon. Elemental silicon is created commercially via the reduction of silica (SiO2) with coke in an electric furnace, along with the impure solution is then refined. On a small scale, silicon i