Desulfurization and ring opening of petroleum streams
 A process for the hydrodesulfurization (HDS) of the multiple condensed ring heterocyclic organosulfur compounds and the ring opening of ring compounds present in petroleum and petrochemical streams. The process is conducted in the presence of hydrogen, one or more noble metal catalysts, and a hydrogen sulfide sorbent material. 
Exxon Research and Engineering Company
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Gary B. Michel Edward S. William C. David E.W. Sylvain S. Darryl P. James J. Michele S. Jingguang
McVicker Daage Ellis Baird Jr. Vaughan Hantzer Klein Schorfheide Touvelle Chen