Process and plant for separating a gaseous mixture by adsorption
US4981499A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Sep 28, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P30/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process for separating a gaseous mixture by adsorption includes the steps of: (a) a cocurrent isobaric production (f.sub.p1 -f.sub.p2); (b) a pressure equalization between the adsorber undergoing decompression and another adsorber undergoing countercurrent recompression (f.sub.c1 -N.sub.4); (c) a cocurrent partial emptying to a reservoir (f); (d) a final countercurrent decompression (f.sub.a); (e) a countercurrent scavenging by the gas of the reservoir (f.sub.b); (f) a countercurrent partial recompression by at least one pressure equalization (f'.sub.e); (g) a countercurrent final recompression (f'.sub.di -F'.sub.d2); in which process the sum of the duration of the operations according to (c) and (d) is less than said phase shift and the sum of the durations of the operations according to (c), (d) and (e) is less than twice said phase shift; (h) at least two adsorbers are simultaneously in isobaric production, wherein: (i) the number of adsorbers is at least equal to four and less than 3+x+y, x and y being respectively the number of adsorbers in production and the number of pressure equalizations; (j) the emptying is introduced into the storage reservoir; (k) each pressure equaliza…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.