Gas filter, method for producing a gas filter and use of said gas filter

US6340379B1 · kind B1 · utility

Assignee

• Creavis Gesellschaft fuer Technologie und Innovation mbH · DE

Inventors

• Bernd Penth · Lebach, DE
• Gerhard Hoerpel · Nottuln, DE
• Christian Hying · Rhede, DE

Key dates

• Filing date: Jul 26, 1999
• Grant date: Jan 22, 2002
• Expiry date: Jul 26, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249957
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A gas filter, a process for producing a gas filter and the use of the gas filter. The filtration of gases, in particular of gases which are contaminated by solids, e.g. automobile exhaust gases, is difficult since the solids which have been filtered out block the filter over the course of time. The gas filter of the invention can be used over relatively long periods of time since it is regenerable. The improvement achieved by the invention compared to conventional gas filters is that the filter comprises a composite material which can be heated in a simple manner by application of a voltage to the electrically conductive support material of the composite material and thermally decomposable substances which can block the filter can be decomposed. The filter of the invention can be used wherever gases which are contaminated by thermally decomposable solids have to be cleaned.