Processing of chlorosilane flows containing boron

US8246925B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Christoph Schwarz · Burnaby, CA
• Dorothea Schwarz · Marl, DE
• Hartwig Rauleder · Rheinfelden (Baden), DE
• Ingo Pauli · Alzenau, DE
• Andreas Nelte · Johannesweg, DE
• Harald Seiler · Mainz, DE

Key dates

• Filing date: Jan 22, 2008
• Grant date: Aug 21, 2012
• Expiry date: Oct 21, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B33/10778
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a method for yielding boron-depleted chlorosilanes from a chlorosilane mixture containing boron by means of separation by distillation of a boron-enriched distillation flow. The invention further relate to a device for yielding boron-depleted chlorosilanes from a chlorosilane mixture containing boron.