Method and apparatus for the selective adsorption of vaporous or gaseous impurities from other gases

US4203734A · kind A · utility

Assignee

• Ceagfilter und Entstaubungstechnik GmbH · DE

Inventors

• Karl Winter · Obertshausen, DE
• Guunter Staschik · Halingen, DE

Key dates

• Filing date: Dec 7, 1977
• Grant date: May 20, 1980
• Expiry date: Dec 7, 1997

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2259/41
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Purification of a stream of air or gas containing a mixture of vaporous or gaseous impurities of different volatilities and selective adsorption and recovery of the impurities in adsorption filters by passing the stream containing impurities through at least two adsorption filters connected in tandem, maintaining the temperature of adsorption in the first adsorption filter sufficiently high to selectively adsorb the impurities of low volatility, passing the stream containing impurities of higher volatility from the first adsorption filter through at least the second adsorption at a temperature lower than the temperature in the first adsorption filter to selectively adsorb the impurities of higher volatility. Temperature of adsorption may be obtained by passing the stream through a heat exchanger preceding the filter.