METHOD OF PRODUCING MIDDLE DISTILLATES, COMPRISING THE HYDROISOMERISATION AND HYDROCRACKING OF FEEDSTOCKS RESULTING FROM THE FISCHER-TROPSCH METHOD, USING A DOPED CATALYST BASED ON MESOPOROUS ALUMINA-SILICA HAVING A CONTROLLED MACROPORE CONTENT

摘要

The invention relates to a method of producing middle distillates from a paraffinic feedstock produced by means of Fischer-Tropsch synthesis, using a hydrocracking/hydroisomerisation catalyst comprising: at least one hydro-dehydrogenating element which is selected from the group containing the elements from group VIB and group VII of the periodic table of elements, between 0.01 and 6 % phosphorus as a doping element, and a non-zeolitic support based on mesoporous alumina-silica.