Regenerative adsorption processes for removing organic components from gas streams

US7749307B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Ole Brettschneider · Berlin, DE
• Knud Werner · Krefeld, DE
• Torsten Erwe · Odenthal, DE

Key dates

• Filing date: Apr 10, 2008
• Grant date: Jul 6, 2010
• Expiry date: Dec 26, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Process for providing a purified gas stream, comprising: providing a crude gas stream comprising an organic impurity; condensing at least a portion of the impurity from the gas stream to form a prepurified gas stream; and subjecting the prepurified stream to adsorption on a first adsorption medium; wherein the first medium is subjected to a regeneration comprising: providing a circulating inert gas stream having a temperature of at least 100° C.; passing the circulating inert gas stream over the first medium to form an organic impurity-loaded inert gas stream; cooling the loaded stream; condensing at least a portion of the organic impurity from the cooled stream to provide a prepurified circulating inert gas stream; subjecting the prepurified gas stream to adsorption on a second adsorption medium to provide a purified circulating inert gas stream; and recycling the purified gas stream to the circulating inert gas stream.