Silicon purification

Details Silicon purification Silicon purification

1982-01-27

1983-06-14

Vertiz, O. R.

Chemistry of inorganic compounds

Silicon or compound thereof

Elemental silicon

C01B 3302

Patent

active

043882862

ABSTRACT:
A method for refining silicon to produce a high purity silicon product for re-use in industries which demand high purity silicon starting material, comprising vacuum refining said silicon to remove gaseous CO and SiO followed by mixing with an effective fluxing material of at least one fluoride of alkali metals and/or alkaline earth metals, heating the mixture at a temperature and time sufficient to produce a molten silicon phase and a slag phase, and separating the slag from the silicon for recovery of the silicon for re-use.

REFERENCES:
patent: 3442622 (1969-05-01), Monnier et al.
patent: 4304763 (1981-12-01), Dietl et al.

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