Air separation process and apparatus for high argon recovery and moderate pressure nitrogen recovery
US4822395A · kind A · utility
43Cited by
12References
20Claims
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Key dates
| Filing date | Jun 2, 1988 |
| Grant date | Apr 18, 1989 |
| Priority date | — |
| Expiry date | Jun 2, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/924
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process and apparatus to produce argon at high recovery with nitrogen at higher than conventional pressure comprising three columns wherein first column bottoms are passed into the second column, second column bottoms drive a third column top condenser, and argon-containing fluid is passed for separation into the third column from the second column at a point intermediate the points where first column bottoms enter and second column bottoms exit the second column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.