A CATALYST SYSTEM FOR COMBINING HYDROTREATING AND HYDROCRACKING AND A PROCESS FOR UPGRADING HYDROCARBONACEOUS FEEDSTOCKS

摘要

A physically intermixed catalyst system comprising two distinctly differentcatalytic particles, the first of which is ahydrodenitrification and/or hydrodesulfurization catalyst and the second ofwhich is a relatively active hydrocracking catalystwherein the catalyst particles of both catalytic components are substantiallythe same size, that is the effective diameter of eachcatalyst component is substantially the same. The catalyst system of thepresent invention can be layered with unmixed catalysts.The novel systems of the present invention have been found to providesurprisingly good selectivity for liquid products andstability against catalyst fouling when used in combined hydrotreating andhydrocracking applications, and can therefore be used toprovide a stable catalyst system which offers even heat distribution andreactor control in such applications.