Isomerization process
US4159283A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1978 |
| Grant date | Jun 26, 1979 |
| Priority date | — |
| Expiry date | Apr 7, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C5/2708
- WIPO fieldOrganic fine chemistry
- 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 improvement in the process comprises a first step wherein the temperature is maintained at a level which provides from about 50 mole percent to about 75 mole percent conversion of said ethylbenzene for a period of time of from about 24 hours to about 96 hours, and a second step wherein the temperature is maintained at a level which provides from about 15 mole percent to less than about 50 mole percent conversion of said ethylbenzene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.