Process for recovering olefins from gaseous mixtures
US5639935A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Sep 7, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/156
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ethylene and propylene are recovered from a mixture thereof with other hydrocarbons by: (a) feeding the mixture to a separation zone with a top and a bottom; (b) feeding to the top above the mixture an aqueous complexing solution to form Cu(I) complexes of ethylene and propylene; (c) feeding below the mixture ethylene to strip propylene from the propylene complex; (d) removing from the bottom below the stripping gas a first liquid stream containing the Cu (I) ethylene complex; (e) recovering ethylene from the Cu(I) complex using reduced pressure and/or elevated temperature; (f) removing from the separation zone between the the gaseous mixture and the complexing solution, a second liquid stream comprising Cu (I) propylene complex; (g) recovering propylene from the Cu(I) complex and producing a liquid recycle stream comprising copper (I) salt; and (h) recycling the liquid recycle stream from step (g) to the separation zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.