Process for the purification of silicon by the action of an acid

US4588571A · kind A · utility

Assignee

• Heliotronic Forschungs- und Entwicklungsgesellschaft fur Solarzellen-Grundstoffe mbH · DE

Inventors

• Erich Bildl · Tittmoning, DE
• Josef Dietl · Schallstadt, DE
• Rolf Baueregger · Altötting, DE
• Dieter Seifert · Vilshofen an der Donau, DE

Key dates

• Filing date: Apr 19, 1984
• Grant date: May 13, 1986
• Expiry date: Apr 19, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B33/037
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for the purification of silicon by the action of one or several acids, wherein silicon is established as a stationary phase and one or several acids are caused to form mobile phases for traversing the stationary phase under pressure and absorbing the impurities from the silicon during the passage, leaving behind the silicon with a higher degree of purity.