Process for producing paraxylene by methylating toluene with methanol at a low contacting time
US7321072B2 · kind B2 · utility
4Cited by
7References
19Claims
0Family size
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Key dates
| Filing date | Feb 18, 2004 |
| Grant date | Jan 22, 2008 |
| Priority date | — |
| Expiry date | Apr 1, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2529/40
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing para-xylene by the selective methylation of toluene comprising contacting a reactant mixture comprising toluene, methanol and added water, with an oxide modified ZSM-5 zeolite catalyst in a flow reactor in conditions selected to limit coke formation on the catalyst and at a contact time, between reactant mixture and catalyst, of less than 1 second.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.