Process for xylenes isomerization
US9975820B2 · kind B2 · utility
3Cited by
8References
8Claims
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Key dates
| Filing date | Oct 2, 2017 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Oct 2, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the isomerization of a para-xylene depleted, meta-xylene rich stream under at least partially liquid phase conditions using ZSM-23 with an external surface area of at least 75 m2/g (indicating a small crystallite size), and a SiO2/Al2O3 ratio between 15 and 75 that produces a higher than equilibrium amount of para-xylene, i.e., more than about 24 wt % of para-xylene, based on the total amount of xylenes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.