Isolation of SF6 from insulating gases in gas-insulated lines

US6723153B2 · kind B2 · utility

Inventors

• Michael Pittroff · Hannover, DE
• Thomas Schwarze · Hannover, DE
• Heinz-Joachim Belt · Burgwedel, DE

Key dates

• Filing date: Nov 20, 2001
• Grant date: Apr 20, 2004
• Expiry date: Nov 20, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/151
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Gas mixtures of SF6 and N2 which have been used as an insulating filler gas for underground cables can be separated by use of a membrane separation in order to recover the SF6.