Process for the purification of permanent gases using chabazite adsorbents
US4732584A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1987 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | May 22, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/186
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Thoroughly dehydrated, certain forms of chabazite have improved utility for purifying bulk gases. Compared to conventional molecular sieves, these chabazites have improved properties for removing low levels of gas contaminants having larger heats of adsorption than the bulk component. Also, the small pore chabazite can remove weakly interacting adsorbates from bulk gases having kinetic diameters which exceed that of the pore opening. This discovery of the intrinsic properties of polyvalent chabazites expands the range of contaminant gases which can be removed from bulk gases economically using standard adsorption processes, e.g. using these adsorbents it is possible to remove trace nitrogen from argon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.