Patent ID: 8236723

Claim:
A method for making a catalyst for the hydrodesulfurisation (HDS) of naphtha, the method comprising: (i) impregnating a silica support that has a silica content of at least about 85 wt. %, based on silica, and has a pore volume between about 0.6 cc/g and about 2.0cc/g, and median pore sizes in the range of about 200 Å to 500 Å with (a) an aqueous solution of a cobalt salt, (b) an aqueous solution of a molybdenum salt, at least one organic acid, and at least one organic additive, said organic additive comprising at least one compound selected from the group consisting of compounds comprising at least two hydroxyl groups and 2-20 carbon atoms, and the (poly)ethers of these compounds, to form a catalyst precursor; (ii) drying the catalyst precursor at a temperature of less than about 350° C. to form a dried catalyst precursor; and (iii) optionally sulfiding the dried catalyst precursor, provided that the dried catalyst precursor or catalyst is not calcined prior to sulfiding or use for HDS; wherein the amounts of cobalt salt and molybdenum salts are sufficient to provide a catalyst containing from about 2 wt. % to about 8 wt. % cobalt oxide and about 8 wt. % to about 30 wt. % molybdenum oxide, based on the silica support.