Patent ID: 7288240

Claim:
Method for the production of hydrogen peroxide by direct oxidation of hydrogen to hydrogen peroxide over a solid catalyst comprising palladium, the method comprising: (i) depositing at least two halogen containing compounds on the solid catalyst, a first halogen containing compound comprising bromine and a second halogen compound comprising fluorine, with the bromine to palladium and fluorine to palladium atom ratios in the range from 0.02 to 20 and from 0.01 to 50, respectively; (ii) decomposing the halogen compounds deposited on the solid catalyst in step (i) by calcination at a temperature above 200° C. under inert, reducing or oxidizing gas atmosphere or under vacuum; and (iii) contacting a solid catalyst obtained from step (ii) with a gas mixture consisting of hydrogen and oxygen or air or O 2 enriched air in an aqueous reaction medium containing a mineral acid.