The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 1983
Filed:
Jan. 27, 1982
Applicant:
Inventors:
Vijay K Kapur, Northridge, CA (US);
Uppala V Choudary, Chatsworth, CA (US);
Assignee:
Atlantic Richfield Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423348 ;
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.