Method for collecting volatile organic substances
US5695546A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1996 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | May 8, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2257/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for collecting volatile organic substances from off-gas containing moisture and volatile organic substances. After the moisture has been removed by a dehumidifying tower filled with moisture absorbent for selectively adsorbing the moisture from the gas containing the organic substances and the moisture, the organic substances are adsorbed and removed under a relatively low temperature condition. The organic substances is desorbed under a relatively high temperature condition from the adsorbing tower which is saturated with the organic substances. The desorbed organic substances are liquefied and collected under a low temperature and/or pressurizing condition. The dry gas from which the organic substances have been removed and made harmless is heated if necessary. Thereafter, the dry gas is purged in a counter flow manner in the dehumidifying tower which is saturated with the moisture to perform the regeneration of the moisture absorbent and is discharged to the outside of the system together with the desorbed moisture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.