Process for purifying metallurgical-grade silicon

Details Process for purifying metallurgical-grade silicon Process for purifying metallurgical-grade silicon

1980-08-11

1981-12-08

Peters, G. O.

Chemistry of inorganic compounds

Silicon or compound thereof

Elemental silicon

C01B 3302

Patent

active

043047637

ABSTRACT:
A process is provided for purifying metallurgical-grade silicon for the manufacture of solar cells, wherein the acid treatment of the silicon, known per se, is combined with vacuum evaporation. This may be optionally combined with slag extraction and directional solidification.

REFERENCES:
patent: 2992080 (1961-07-01), Herrick
patent: 3004835 (1961-10-01), Verner et al.
patent: 3442662 (1969-05-01), Monnier et al.
Chem. Abst.; vol. 80; 42098y; 1974.

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