Production of a xylene isomer in three stages: separation, isomerization with a catalyst with an EUO zeolite base and transalkylation with recycling of C10-aromatic compounds
US6512154B1 · kind B1 · utility
8Cited by
4References
22Claims
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Key dates
| Filing date | Jun 22, 2000 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Jun 22, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2529/74
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of at least one xylene isomer, paraxylene, metaxylene or orthoxylene from an aromatic feedstock that has 7 to 10 carbon atoms per molecule. The process comprises a stage for transalkylation of C7- and C9-aromatic compounds, a stage for separation of xylenes and a stage for isomerization of xylenes. The isomerization catalyst used in the process comprises at least one EUO zeolite composition whose crystals are grouped in aggregates that have a grain size with a value of Dv,90 less than or equal to 500 microns and at least one element of group VIII.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.