Process and device for the preparation of a cry ogenic fluid in the high purity liquid state
US5784898A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 1997 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | May 14, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/908
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process and apparatus for the preparation of a cryogenic fluid in the high purity liquid state, such as liquid argon, liquid helium or liquid nitrogen of high purity, substantially free from at least one of the impurities which it contains. The cryogenic fluid in the liquid state to be purified is placed in contact with an adsorbent permitting the adsorption of at least one of the impurities, and the cryogenic fluid is recovered in the high purity liquid state, characterized in that cooling of at least a proportion of the adsorbent is maintained with purified cryogenic fluid in the liquid state during at least a part of the duration of the stoppage stage separating a purification cycle N and a purification cycle N+1, which are successive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.