Method of fractionation of a gaseous mixture by adsorption
US4042349A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1972 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Oct 18, 1992 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved method of fractionation of a gaseous mixture by adsorption, in which the efficiency of extraction and the content of the desired constituent in the gaseous fraction extracted are increased, the method utilizing two or more adsorption lines, each including at least one adsorber comprising an adsorbent mass which preferentially adsorbs at least one constituent of the gaseous mixture, the first adsorption line comprising: PA1 A constant-pressure extraction stage, during which the gaseous mixture is introduced into the inlet of said line, circulates from the inlet to the outlet of at least one adsorber in said line in the adsorption direction, at a high pressure in said adsorber, so as to obtain at the outlet of said line a gaseous fraction impoverished in at least one constituent of said gaseous mixture; PA1 A regeneration stage comprising a period of falling pressure, during which the outlet of the adsorption line is closed and there is extracted at the inlet of said line a gaseous fraction enriched in at least one constituent of said gaseous mixture, while reducing the pressure in the adsorber to a low pressure for said adsorber; PA1 And a pressure-increase stage, during…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.