| abstract |
A process of manufacturing a fluid bed vinyl acetate catalyst comprising Pd, M and A wherein M equals barium, gold, lanthanum, niobium, cerium, zinc, lead, calcium, strontium, antimony, or mixtures thereof; and A equals at least one alkali metal comprising (a) impregnating with a solution comprising a halide-free metal salt of the palladium, M and at least one alkali metal, a preformed substantially inert microspheroidal support particles having a pore volume of between 0.2 to 0.7 cc/g, a surface area of between 100 to 200 m<2>/g and at least 50% of said particles have a size below 100 microns; and said pre-formed support having been prepared by mixing 80 to 20 wt% of an aqueous sol comprising substantially inert microspheroidal particles having 40 to 80 millimicron mean particle diameter with 20 to 80 wt% solid substantially inert particulate material having little or no microporosity to form an aqueous mixture, spray drying said aqueous mixture, and calcining said particles to form said substantially inert support, and (b) drying the impregnated pre-formed support. |