Recovery of aromatic hydrocarbons using lubricating oil conditioned membranes
US6187987A · kind A · utility
48Cited by
16References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1998 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Jul 30, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G67/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Permselective separation of aromatic hydrocarbons from non-aromatic hydrocarbons in a feed stream is accomplished using improved asymmetric membranes. The preferred membranes are fashioned from a polyimide and conditioned with a lubricating oil. Feed streams containing a mixture of aromatic and non-aromatic hydrocarbons are contacted with the dense active layer side of the polyimide membrane under a pressure and temperature sufficient to selectively permeate the desired aromatic hydrocarbon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.