Xylene isomerization
US4159282A · kind A · utility
48Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1978 |
| Grant date | Jun 26, 1979 |
| Priority date | — |
| Expiry date | Jun 9, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A catalytic process is provided for isomerizing an isomerization feed containing an aromatic C.sub.8 mixture of ethylbenzene and xylene in which the para-xylene content is less than equilibrium which comprises contacting said feed, under conversion conditions, with a catalyst comprising a crystalline aluminosilicate zeolite having a crystal size of at least about 1 micron, a silica to alumina ratio of at least about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12 to yield an isomerization product characterized by a reduced ethylbenzene content and an enhanced para-xylene content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.