ZEOLITE CATALYST WITH CONTROLLED CONTENT OF A DOPING ELEMENT AND IMPROVED METHOD FOR TREATING HYDROCARBON FEEDSTOCKS

摘要

The invention concerns doped catalysts on a mixed zeolite/alumino-silicate support with low macropore content and hydrocracking/hydroconversion and hydrotreatment methods using same. The catalyst comprises at least one hydro-dehydrogenating element selected in the group consisting of elements of group VIB and of group VIII of the periodic table and a doping element in controlled amount selected among phosphorus, boron and silicon and a Y zeolite-based support defined by a crystalline parameter of the elementary mesh ranging between 24.40 x 10^-10 m and 24.15 x 10^-10 m and of silica-alumina containing an amount ranging between 5 wt. % and 95 wt. % of silica (SiO₂).