point between an upper sulfur resistant catalyst bed and a lower sulfur sensitive catalyst bed having high activity for aromatic saturation prior to this invention it has either been necessary to carry out a multi stage reaction with a plurality of reactors or else a compromise has been necessary in the selection of the catalyst as noted previously the more active catalysts for aromatic saturation are generally more sulfur sensitive such that in treating a high sulfur aromatic feedstock it has not previously been practical to use a high activity catalyst because of the catalyst poisoning problem a specific example of the use of the process of this invention in preparing a low sulfur jet fuel is described below a liquid hydrocarbon feedstock containing 0 5 weight percent sulfur and having a boiling range of from 340 u00b0 f to 540 u00b0 f is introduced to a furnace and heated to 675 u00b0 f the heated hydrocarbon is then introduced into the top of a reactor maintained at a pressure of 700 psig the feedstock passes downwardly over an upper catalyst bed comprised of coo 3 percent by weight and moo 3 12 percent by weight supported on an aluminum oxide carrier the liquid effluent from the upper catalyst bed then passes downwardly through a lower catalyst bed comprised of nio 2.