Isomerization process
US4158676A · kind A · utility
13Cited by
5References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1978 |
| Grant date | Jun 19, 1979 |
| Priority date | — |
| Expiry date | Jun 14, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2529/70
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved process is provided for catalytic isomerization of monocyclic methyl-substituted aromatic hydrocarbon compounds of from 8 to 10 carbon atoms contained in a feedstock also containing ethylbenzene in a reaction zone maintained under conditions such that said isomerization is accomplished in the vapor phase. The catalyst for the process contains zeolite characterized by a constraint index, hereinafter defined, within the approximate range of 1 to 12. The improvement in the process comprises contacting the catalyst, in situ, with one or more basic nitrogen compounds or precursors thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.