Apparatus and process for preparing substantially halogen-free trialkoxysilanes

US6727375B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Frank Steding · Marl, DE
• Gerda Grund · Coesfeld, DE
• Burkhard Standke · Soest, DE
• Frank Kropfgans · Rheinfelden (Baden), DE
• Michael Horn · Rheinfelden (Baden), DE
• Albert-Johannes Frings · Rheinfelden (Baden), DE
• Jaroslaw Monkiewicz · Rheinfelden (Baden), DE
• Hans-Gunther Srebny · Stolzenau, DE
• Claus-Dietrich Seiler · Rheinfelden (Baden), DE
• Hans-Joachim Kotzsch

Key dates

• Filing date: Mar 29, 2002
• Grant date: Apr 27, 2004
• Expiry date: Mar 29, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/025
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

An apparatus for continuously preparing substantially halogen-free, in particular chlorine-free, trialkoxysilanes of the general formula I(RO)3SiH  (I)in which R is an alkyl group having from 1 to 6 carbon atoms, has a main reactor unit (1), at least one metering unit (2, 3, 4) for liquids and/or suspensions, located upstream of the main reactor, and at least one metering unit (5) for gaseous and/or vaporous substances, and also a product workup unit (6) located downstream of the main reactor. A process for preparing substantially halogen-free trialkoxysilanes of the general formula I in which silicon is reacted with alcohols in an inert solvent utilizes at least one organocopper compound catalyst.