Xylene isomerization
US6797849B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2002 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Dec 27, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C5/2775
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for isomerizing xylenes in a feed containing xylenes is disclosed which process comprises: contacting the feed with a first isomerization catalyst in a first reactor under a first set of conditions effective to isomerize xylenes in the feed; and contacting the xylenes with a second isomerization catalyst in a second reactor under a second set of conditions effective to isomerize xylenes in the feed. The second reactor is typically a clay treater and contains a further catalyst effective under the second set of conditions to remove olefins in the feed. Any ethylbenzene in the feed is removed, either by dealkylation or isomerization, in the first reactor or in a third reactor upstream of the first and second reactors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.