Single column distillative separation employing bottom additives
US5345772A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 1993 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | May 14, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/929
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for the distillative separation of hydrocarbon feed stream such as a carbon dioxide-containing feed stream in a single distillation column into a vapor carbon dioxide product stream and a side column product stream such as a liquid propane stream employing a recycled C4+ bottom additive stream. The method comprises: Introducing a feed stream into a single cryogenic distillation column; withdrawing a C4+ bottom additive stream from the bottom of the column; recycling the C4+ stream into the single column above the feed point of the feed stream, and withdrawing from a side point in the column above the introduction of the feed stream a vapor product stream enriched in C3+, and cooling the vapor stream to produce a C3 liquid product stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.