A process for {HEAD ~ demetalation}, desulfurization and dewaxing of {TAIL ~ residual oil} has been discovered using a two stage process 
A process for { HEAD ~ demetalation } , desulfurization and dewaxing of { TAIL ~ residual oil } has been discovered using a two stage process
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH