Isomerization of dimethylcyclohexanedicarboxylate

摘要

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 H3PO4 on a metal oxide, said metal oxide selected from a group consisting of ZrO2, TiO2, Al2O3, and HfO2, or a tungsten-modified ZrO2.