Selective hydrodesulfurization of cracked naphtha using novel manganese oxide octahedral molecular sieve supported catalysts

A continuous process for treating a charge cracked naphtha containing olefinic components and undesired sulfur which comprises:

• maintaining a bed of sulfided, "manganese oxide octahedral molecular sieve (OMS)" supported catalyst containing intentionally added (i) a metal of non-noble group VIII, and (ii) a metal of Group VI-B;
• passing the charge cracked naphtha containing olefinic components and undesired sulfur into contact with said catalyst in the presence of a gas selected from pure hydrogen and a gas mixture comprising greater than 60% by volume hydrogen;
• maintaining said charge cracked naphtha containing olefinic components and undesired sulfur in contact with said catalyst at hydrodesulfurization conditions thereby effecting hydrodesulfurization of said charge cracked naphtha containing olefinic components and undesired sulfur and forming a product stream of desulfurized naphtha containing a decreased content of sulfur and retaining at least 50% of the olefin content of the charge cracked naphtha;
• and
• recovering said product stream of cracked naphtha containing a decreased content of sulfur.