Process for the subcritical drying of aerogels

US5680713A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

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

Key dates

• Filing date: Mar 5, 1996
• Grant date: Oct 28, 1997
• Expiry date: Mar 5, 2016

Classification

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

Abstract

A process for the subcritical drying of a lyogel to give an aerogel comprises treating the lyogel with a heat transfer liquid which has a temperature above the boiling point of the pore liquid of the lyogel under the pressure of the system and subsequently separating the dried aerogel from the heat transfer liquid.