Recovery process
US4842621A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Mar 26, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2259/403
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a process for separating a condensable gas from a non-condensable gas by switching at least three adsorber beds which preferentially adsorb the condensable gas serially through the following steps: PA1 (a) an adsorption step in which a mixture of the condensable and non-condensable gases are passed through the bed and the separated non-condensable gas is withdrawn therefrom; PA1 (b) a supercharging step in which a stream relatively rich in the condensable gas is passed through the bed, the stream having an actual volume at least three times that necessary to displace a void volume of the bed; PA1 (c) a desorption step in which a vacuum is drawn on the bed and an amount of a non-condensable gas is bled through the bed; PA2 and wherein the non-condensable gas in conjunction with entrained condensable gas from step (c) is passed into a vacuum pump, is compressed, at least some of the condensable gas is condensed and at least part of the non-condensable gas and remaining condensable gas is the passed to step (b) as the stream relatively rich in the condensable gas; PA2 and such that continuous operation of the process with at least one of the beds in the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.