Process for the preparation of vinyl acetate
AssigneeHoechst Aktiengesellschaft
InventorsFriedrich Wunder, Gunter Roscher, Klaus Eichler
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Abstract
The invention relates to a process for the preparation of vinyl acetate in the gas phase from ethylene, acetic acid and oxygen or oxygen-containing gases on a catalyst which contains palladium and/or compounds thereof and if appropriate additionally gold and/or gold compounds and, as activators, alkali metal compounds and if appropriate additionally cadmium compounds, on a support. The support consists of cylindrical particles with curved front faces. The support material is aerogenic SiO.sub.2 or an aerogenic SiO.sub.2 -Al.sub.2 O.sub.3 mixture having a surface area of 50-250 m.sup.2 /g and a pore volume of 0.4-1.2 ml/g, which is formed to the extent of at least 50% by pores having a diameter of 50-200 .ANG..
Claims3
A process for the preparation of vinyl acetate in the gas phase from ethylene, acetic acid and oxygen or oxygen-containing gases on a catalyst which contains palladium and/or compounds thereof and optionally gold and/or gold compounds and, as activators, alkali metal compounds and if optionally cadmium compounds, on a support which consists of aerogenic SiO.sub.2 or an aerogenic SiO.sub.2 -Al.sub.2 O.sub.3 mixture having a surface area of 50-250 m.sup.2 /g and a pore volume of 0.4-1.2 ml/g, the pore volume being formed to the extent of at least 50% by pores having a diameter of 50-200 Angstroms, wherein the support consists of cylindrical particles having curved front faces.
Dependencies are inferred from the claim text.