Patent ID: 8492306

Claim:
Method for preparing a catalyst, comprising: preparing a first solution comprising a gold precursor and a palladium precursor; preparing an alumina suspension; heating the alumina suspension to a preferred temperature range between 45° C. and 60° C.; normalizing the pH of the alumina suspension comprising adjusting the pH of the alumina suspension to a pH of 7.0+/−0.1 prior to introducing the first solution to the alumina suspension; introducing the first solution to the alumina suspension and coincidentally introducing sodium carbonate to the alumina suspension to maintain the pH of the resulting solution at a preferred pH level of 7.0+/−0.1 and maintaining temperature of the resulting solution between 45° C. and 60° C.; separating solids in the resulting solution; and calcining the separated solids to form a catalyst including gold and palladium co-deposited onto alumina.