Patent ID: 7357856

Claim:
A process for producing low sulfur naphtha product streams comprising: a) contacting an olefinic naphtha boiling range feedstream containing organically bound sulfur, nitrogen-containing compounds, and olefins with (i) at least one acidic material effective at removing at least a portion of said nitrogen-containing compounds, and (ii) at least one polar material effective at removing at least a portion of said nitrogen-containing compounds, the polar material being different than the acidic material, in a first reaction stage operated under conditions effective at removing at least a portion of said nitrogen-containing compounds thereby producing at least a first reaction stage effluent having a reduced amount of nitrogen-containing compounds; and b) contacting at least a portion of the first reaction stage effluent of step a) above with a catalyst selected from hydrodesulfurization catalysts comprising about 1 to 25 wt. % of at least one Group VI metal oxide and about 0.1 to 6 wt. % of at least one Group VIII metal oxide, a Group VIII to Group VI atomic ratio of about 0.1 to about 1.0, a median pore diameter of about 60 Å to about 200 Å, and a Group VI metal oxide surface concentration of about 0.5×10 −4 to about 3×10 −4 g Group VI metal oxide/m 2 in the presence of hydrogen-containing treat gas in a second reaction stage to produce at least a desulfurized olefinic naphtha boiling range product stream wherein said second reaction stage is operated under selective hydrodesulfurizing conditions.