Process for restarting an auxilliary column for argon/oxygen separation by distillation and corresponding installation
US5505051A · kind A · utility
16Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1995 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Mar 1, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/924
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
During restarting an argon column (2), two valves (15, 17) provided at the output of a pump (3) are controlled while maintaining a constant level in the base of the argon column, at the outset at a predetermined first control level (N2), then while progressively lowering the controlled value of the constant level. Use in installations for air distillation whose argon column, of the packed type, has a sufficient height to purify the argon of oxygen to an oxygen content less than 100 ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.