Process for sub-critically drying aerogels

US6131305A · kind A · utility

Assignee

• Hoechst Research & Technologies GmbH & Co. KG · DE

Inventors

• Rainald Forbert · Flörsheim, DE
• Andreas Zimmermann · Griesheim, DE
• Douglas M. Smith · Albuquerque, US
• William C. Ackerman · Albuquerque, US

Key dates

• Filing date: Jul 2, 1999
• Grant date: Oct 17, 2000
• Expiry date: Jul 2, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J13/0091
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the sub-critical drying of a lyogel to form an aerogel, in which the lyogel is treated with a heat-conveying fluid at a temperature above the boiling point of the pore liquid of the lyogel under system pressure and the dried aerogel is then separated from the heat-conveying fluid.