Catalytic hydrodehalogenation of halogen-containing compounds of group IV elements

US5716590A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Gerhard Roewer · Freiberg, DE
• Uwe Paetzold · Burghausen, DE
• Holger Walter · Aalen, DE

Key dates

• Filing date: Dec 8, 1994
• Grant date: Feb 10, 1998
• Expiry date: Dec 8, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Catalytic dehalogenation (or hydrodehalogenation) of halogen-containing compounds of elements of group IV of the periodic table in the presence of hydrogen is carried out using a finely-dispersed catalytically active material which comprises silicon and at least one transition metal, and which is characterized by high catalytic activity and stability. This process can be used, for example, for synthesizing compounds or alternatively for decomposing halogen-containing compounds, for instance in waste-water or waste-gas purification processes. It is also suitable for dehalogenation (hydrodehalogenation) of halogen-containing silane compounds, for instance of silicon tetrachloride or alkyl trichlorosilane compounds, and the original purity of the silanes used as starting materials is retained by the products. Tetrachlorosilane, for example, can be converted into trichlorosilane.