Hydrotreating process employing a three-stage catalyst system wherein a titanium compound is employed in the second stage

摘要

The catalytic hydrotreating of a residual oil-containing feedstream is carried out in a multi-catalyst bed in which the feedstream is first contacted with a catalyst bed which comprises of alumina, cobalt, molybdenum and nickel. The feedstream is then contacted with a second catalyst bed which contains a catalyst comprising alumina to which molybdenum, titanium and nickel have been added, followed by a third catalyst bed which contains a catalyst comprising alumina to which molybdenum and nickel have been added.