Process for purifying halogenosilanes

US4112057A · kind A · utility

Assignee

• Wacker-Chemitronic Gesellschaft fur Elektronik Grundstoffe mbH · DE

Inventors

• Winfried Lang · Burghausen, DE
• Dietrich Schmidt · Camp Hill, US
• Johann Hofer · Grettstadt, DE
• Rudolf Pachnek · Raitenhaslach, DE
• Heinz-Jorg Rath · Burghausen, DE

Key dates

• Filing date: Oct 14, 1976
• Grant date: Sep 5, 1978
• Expiry date: Oct 14, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01G17/04
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Halogenosilanes and halogenogermanes which are contaminated by a boron-coining impurity are purified by treatment with an effective amount of a hydrated metal oxide or a hydrated silicate containing from about 3 to about 8% by weight of water, and then distilling the treated halogenosilane or halogenogermane at a temperature about 3.degree. to about 15.degree. C above its boiling temperature, and at atmosphere pressure.