Isomerization of dimethylcyclohexanedicarboxylate
US5231218A · kind A · utility
5Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1992 |
| Grant date | Jul 27, 1993 |
| Priority date | — |
| Expiry date | Oct 23, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/293
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Provided is a fixed bed heterogeneous catalyst that promotes the isomerization of cis/trans-DMCD to trans-DMCD in economical fashion with short reaction times and in high purity. The catalyst is preferably H.sub.3 PO.sub.4 on a metal oxide, said metal oxide selected from a group consisting of ZrO.sub.2, TiO.sub.2, Al.sub.2 O.sub.3, and HfO.sub.2, or a tungsten-modified ZrO.sub.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.