In the first stage, the residual oil, under demetalation and desulfurization reaction conditions, is passed over a catalyst comprising about 1 to {HEAD ~ about 10 weight percent} of {TAIL ~ a Group VIB metal}, based on the total catalyst weight, on a supporting comprising at least 85 weight percent alumina 
In the first stage , the residual oil , under demetalation and desulfurization reaction conditions , is passed over a catalyst comprising about 1 to { HEAD ~ about 10 weight percent } of { TAIL ~ a Group VIB metal } , based on the total catalyst weight , on a supporting comprising at least 85 weight percent alumina
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH