Process for isomerizing non-equilibrium xylene-containing feed streams
US7297830B2 · kind B2 · utility
5Cited by
19References
20Claims
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Key dates
| Filing date | Sep 14, 2005 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | May 12, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Reduced co-production of toluene and C9 and higher aromatics such as trimethylbenzene, methylethylbenzene, and diethylbenzene is achieved in processes for the isomerization of xylenes to close to equilibrium using a layered catalyst having a thin outer layer of molecular sieve and hydrogenation metal component on a core, wherein at least about 75 mass-% of the hydrogenation metal component is in the outer layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.