Polyvalent ion exchanged adsorbent for air separation
US4481018A · kind A · utility
47Cited by
5References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1982 |
| Grant date | Nov 6, 1984 |
| Priority date | — |
| Expiry date | Nov 15, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2257/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to faujasite-containing compositions in which the original hydrogen or monovalent forms are ion exchanged to their polyvalent form and then thermally activated to promote dehydration and dehydroxylation of the faujasite while maintaining substantially the same zeolite content. The resulting compositions containing faujasites substantially in their dehydrated/dehydroxylated state have been found to have surprisingly high selectivities and capacities for the separation of air into nitrogen and oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.