An improved method is described for presulfiding and preconditioning a residuum hydrotreating or hydrocracking catalyst as {HEAD ~ an integrated part} of the hydroconversion process in which catalyst is added on {TAIL ~ stream} intermittently or continuously without interruption of the hydroconversion process 
An improved method is described for presulfiding and preconditioning a residuum hydrotreating or hydrocracking catalyst as { HEAD ~ an integrated part } of the hydroconversion process in which catalyst is added on { TAIL ~ stream } intermittently or continuously without interruption of the hydroconversion process
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