Patent ID: 6291392
Filing Date: 2001-09-18
Classification: B01J,C07C

Abstract:
A process for preparing an organic carbonate comprising:(I) preparing a catalyst by a process comprising:(a) providing a sol-gel comprising,(i) a first metal oxide selected from the group consisting of silicon oxide, aluminum oxide, titanium oxide, zirconium oxide and mixtures thereof,(ii) a second metal oxide selected from the group consisting of metal oxides of the elements of groups 4, 5, 6, 7, 11, 12, 13, 14, the iron group (atomic numbers 26 to 28), the rare-earth metals (atomic numbers 58 to 71) and mixtures thereof, and(iii) a metal selected from the group consisting of platinum metals, compounds of platinum metals (atomic numbers 44 to 46 and 77 and 78) and mixtures thereof, said metal being present in an amount of 0.01 to 15 wt. %, calculated as platinum metal with respect to the total weight of said catalyst, said first metal oxide (i), said second metal oxide (ii) and said metal (iii) each being formed independently from suitable precursors,(b) aging said sol-gel to obtain an aged sol-gel; and(c) drying said aged sol-gel to obtain said catalyst; and(II) reacting an aromatic hydroxy compound with carbon monoxide and oxygen in the presence of said catalyst, a quaternary ammonium or phosphonium salt and a base.