Patent · US Expired

Method and system for purifying exhaust gas

US7272942B2 · kind B2 · utility

0Cited by

18References

17Claims

0Family size

Assignee

AIR PRODUCTS AND CHEMICALS, INC. · US

Inventors

Hans Erler · Hattingen, DE
Peter Zollner · Castrop-Rauxel, DE
Klaus Hermanns · Aßlar, DE
Norbert Hagenbruck · Oberhausen, DE

Key dates

Filing date	Apr 28, 2004
Grant date	Sep 25, 2007
Priority date	—
Expiry date	Feb 27, 2025

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2259/416
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a method and system for purifying exhaust gas, especially a solvent-containing exhaust gas from refrigerator recycling, wherein the dried, pressurized exhaust gas is cryogenically condensed, the condensed components are separated from the remaining exhaust gas, the cold and purified pressurized exhaust gas is passed through an adsorber to adsorbe the remaining condensed components, the adsorber is purged with a warmed gas stream, namely either a warmed inert gas stream or the purified exhaust gas respectively at reduced pressure, and the desorbed gas is recycled.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.