abstract |
The present invention relates to use solid catalyst is the aliphatic acid of the single and many epoxy-functionals of the Vlb family metal oxide preparation of load, their the improving one's methods of ester and composition thereof, described carrier comprises silica, aluminium oxide and composition thereof, optionally contain the promoter from VA family, the 5-20wt% that the content of wherein said group vib metal oxide in catalyst is carrier. |