Process for separating mixtures of aromatic C8 hydrocarbons
US5510562A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1993 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Jun 14, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/005
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A processing cycle for separating C.sub.8 aromatics (mixtures of ortho-, para-, meta-xylene and ethylbenzene) is disclosed, in which a first subdivision of the mixture is preformed into two streams respectively comprising: para-xylene and ethylbenzene as the first stream; and meta- and ortho-xylene as the second stream followed by a separation of the first stream by rectification, during which ethylbenzene within specifications is obtained as the overhead fraction, with the second stream also being sent to a separation by rectification, with ortho-xylene within specifications being obtained as the bottom fraction. The possible content of C.sub.9 species can be furthermore removed by subsequent distillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.