Distillation method and column
US6128922A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1999 |
| Grant date | Oct 10, 2000 |
| Priority date | — |
| Expiry date | May 21, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/906
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A distillation method and column in which a gaseous mixture is introduced into a bottom region of a packed column having a plurality packed beds using structured packing. The gaseous mixture comprises higher and lower volatility components. The packed column is operated so that the higher and lower volatility components have a relative volatility within the column in a range of between 1.05 and 1.8. In order to alleviate the effect of liquid maldistribution in the lowermost bed of such a column, the lowermost bed is sized to be between about 50% and about 80% of the height of the next overlying bed, with 80% being preferred and the total height of the packing within the column is at least about six meters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.