Process and apparatus for cleaning styrene-polluted spent air

US4734111A · kind A · utility

Inventors

• Rainer Hoffmann · Langenfeld, DE
• Gunter Hanisch · Gondelsheim, DE

Key dates

• Filing date: Aug 19, 1986
• Grant date: Mar 29, 1988
• Expiry date: Aug 19, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A50/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for cleaning in particular styrene-polluted spent air by filtering out styrene and an apparatus for performing this process are described. The filter used is a biofilter of tree bark, particularly spruce bark. The filter is in the form of a bed of particles with a particle diameter of 0.5 to 3 cm. The process is particularly inexpensive compared with the relevant prior art cleaning process working with the physical absorption of the styrene on active carbon filters.