Preparation of palladium-gold catalyst
AssigneeLyondell Chemical Technology, L.P.
InventorDaniel Travis Shay
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Abstract
A method for preparing a palladium-gold catalyst containing a titania extrudate is disclosed. The titania extrudate is produced by using a carboxyalkyl cellulose and a hydroxyalkyl cellulose as extrusion aids. The titania extrudate has improved processibility and/or mechanical properties. After calcination, the extrudate is used as a carrier for the palladium-gold catalyst. After calcination, the in producing vinyl acetate by oxidizing ethylene with oxygen in the presence of acetic acid.
Claims9
A method for preparing a palladium-gold catalyst comprising (a) mixing titania, a carboxyalkyl cellulose, and a hydroxyalkyl cellulose to form a dough;
- (b) extruding the dough to produce an extrudate;
- and (c) calcining the extrudate to produce a calcined extrudate;
- (d) impregnating the calcined extrudate with a palladium compound and a gold compound to produce an impregnated extrudate;
- and (e) calcining the impregnated extrudate to produce the palladium-gold catalyst;
- wherein the weight ratio of the carboxyalkyl cellulose to the titania is from 1:100 to 3:100.
Dependencies are inferred from the claim text.