Production of high purity silicon by a heterogeneous arc heater

Details Production of high purity silicon by a heterogeneous arc heater Production of high purity silicon by a heterogeneous arc heater

1979-05-25

1980-12-16

Cooper, Jack

Chemistry of inorganic compounds

Silicon or compound thereof

Elemental silicon

204164, 423497, 423499, C01B 3302, C01F 1120, C01D 300

Patent

active

042397405

ABSTRACT:
A process for converting silicon intermediates to high purity silicon by an arc heater characterized by the steps of preliminarily reacting gaseous silicon intermediate, such as a silicon halide, with a metal reductant, such as sodium, to form preliminary reaction products including small solid silicon particles and droplets of salt of the metal reductant, at temperatures below the boiling point of the metal reductant, subsequently heating the reaction products to temperatures above said boiling point in an arc heater chamber to convert the reaction products to droplets of silicon to merge and form larger silicon droplets, and thereafter separating the mixture of silicon droplets and salt vapor.

REFERENCES:
patent: 2941867 (1960-06-01), Maurer
patent: 4102764 (1978-07-01), Harvey et al.
patent: 4102765 (1978-07-01), Fey et al.
patent: 4102766 (1978-07-01), Fey
patent: 4102767 (1978-07-01), Mazelsky et al.
patent: 4102985 (1978-07-01), Harvey
patent: 4107445 (1978-08-01), Wolf et al.

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