| abstract |
With oxides, hydroxides, oxyhydroxides or alkoxides of two to four elements belonging to groups IV, V and VI of the Periodic Table of the Elements, preferably supported on a porous material having surface hydroxyl groups In the presence of a solid catalyst composition selected from the group consisting of, a process for producing various organic carbonates by transesterification and disproportionation in a dual vapor / liquid phase mode, and benzene or THF A method of reactivating a catalyst inactivated by deposition of a polymer by contacting a solution of a hydroxy containing compound in a solvent with the inactivated catalyst. |