Recycling of high-boiling compounds within an integrated chlorosilane system

US8557210B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Laszlo Fabry · Burghausen, DE
• Uwe Paetzold · Burghausen, DE
• Michael Stepp · Braunau am Inn, AT

Key dates

• Filing date: Feb 21, 2007
• Grant date: Oct 15, 2013
• Expiry date: Jul 17, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B33/10763
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Trichlorosilane production is increased while simultaneously lowering environmental burden due to destruction and disposition of high boilers by feeding high boilers from trichlorosilane production or from polycrystalline silicon production into a fluidized bed for production of trichlorosilane from metallic silicon and hydrogen chloride.