TH102406A - A vinyl acetate accelerator that contains metal palladium and gold. And cupric acetate - Google Patents

Abstract

DC60 catalyst for the production of vinylacetate by reacting ethylene, oxy-genes and acetic acids with a large porous backing on highly porous surfaces. Which contains palladium and gold that is Elements in catalytic amounts and cupric acetates The use of this catalyst produces a powerful reaction. The selection is relatively low to carbon dioxide. A catalyst for the production of vinyl acetate by the reaction of ethylene, oxygen and acetic acid, which is composed of a rotor, has many holes on the surface, has many holes. Which contains palladium and gold that is Elemental elements that have catalytic effects and cupricacetate. The use of this catalyst produces a powerful reaction. The selection is relatively low to carbon dioxide.

Claims (8)

1. The method for preparing the catalyst for the production of vinyl acetate involves a reaction of ethylene, oxygen, and acetic acid, combined with the use of a porous support material containing palladium and gold in quantities sufficient to catalyze the reaction, saturating it with a cupric acetate solution. 2. The method of claim 1, whereby the saturation described is such that the cupric avitate containing the saturated catalyst contains approximately 0.3 to approximately 5.0 grams of elemental copper per liter of catalyst. 3. Method of claim 2, where the cupric acetate mentioned contains elemental copper of approximately 0.5 to approximately 3.0 grams per liter of catalyst. 4. Method of Claim 1, where the porous backing mentioned consists of approximately 1 to 10 grams of palladium and approximately 0.5 to 10 grams of gold per liter of catalyst, where the amount of gold ranges from approximately 10 to approximately 125 weight percent depending on the weight of the palladium. 5. Method of Claim 1, where the said prik avitate solution contains soluble alkali metal acetate. 6. Method of Claim 5, where the alkali metal acetate referred to is potassium acetate, which is deposited on the catalyst in an amount of approximately 10 to approximately 70 g/L of catalyst. 7. Method of Claim 1, where the aforementioned porous support, consisting of catalytic quantities of palladium and metallic gold, is prepared by a procedure comprising the saturation of the porous support with an aqueous solution of aqueous palladium salts, the immobilization of the aforementioned palladium as an insoluble compound by reaction with a suitable alkaline compound, subsequent saturation of the catalyst with an aqueous solution of aqueous gold salts, the immobilization of the gold in the subsequent saturated solution by reaction with a suitable alkaline compound to precipitate the insoluble gold compound, and the recovery of the insoluble palladium and gold compounds in the catalyst to their metallic states. 8. Method of Claim 1, where the aforementioned porous support containing a catalytic deposit of palladium and metallic gold is prepared by a procedure comprising the following steps: saturating the support with a solution of a certain amount of aqueous palladium salts containing all the required elemental palladium on the final catalyst and a certain amount of aqueous palladium salts containing only one-third of the required elemental gold on the final catalyst; immobilizing the palladium and gold in the latter solution as insoluble compounds by rotating and/or rolling the saturated support while immersed in a solution of a suitable alkaline compound; retrieving the immobilized palladium and gold to their metallic state; saturating the catalyst with another solution of a certain amount of aqueous palladium salts in such a way that the total amount of elemental gold in the catalyst equals that required in the final catalyst; and saturating the catalyst with another solution of a certain amount of aqueous gold salts in such a way that the total amount of elemental gold in the catalyst equals that required in the final catalyst; and saturating the catalyst with the aqueous palladium salts containing all the required elemental gold in the final catalyst. A suitable alkaline compound of sufficient quantity is used to immobilize the added gold as an insoluble compound, and to reduce the immobilized gold to its metallic form.