Process and adsorbent for the recovery of krypton and xenon from a gas or liquid stream
US6658894B2 · kind B2 · utility
16Cited by
24References
35Claims
0Family size
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Key dates
| Filing date | Jul 29, 2002 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Jul 29, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2205/60
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Xenon and/or krypton are recovered from oxygen containing gas, typically derived from liquid oxygen bottoms in a cryogenic air separation plant, by selective adsorption on a Li and Ag exchange zeolite containing 5 to 40% Ag exchange capacity on an equivalents basis, with periodic thermal regeneration of the adsorbent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.