Hydrotreating catalyst and process therefor

Claim 1

A PROCESS FOR PREPARING A PRE-CRACKING HYDROTREATING CATALYST WHICH COMPRISES: (I) UNIFORMLY ADMIXING AN AQUEOUS AMMONIUM MOLYBDATE SOLUTION WITH AN INORGANIC OXIDE GEL CONSISTING OF AT LEAST 50 WEIGHT PERCENT ALUMINA, UP TO ABOUT 50 WEIGHT PERCENT SILICA, AND UP TO A TOTAL 10 WEIGHT PERCENT OF TITANIA, ZIRCONIA, OR VANADIA, SAID GEL PERCENTAGES TOTALING 100, THE AMOUNT OF AMMONIUM MOLYBDATE SOLUTION ADMIXED BEING SUFFICIENT TO POVIDE FROM ABOUT 5 TO 15 WEIGHT PERCENT MOLYBDENUM OXIDE BASED ON THE TOTAL CALCINED WEIGHT OF MOLYBDENUM OXIDE AND INORGANIC OXIDE GEL: (II) FORMING THE RESULTING MIXTURE INTO A CATALYST SUPPORT: (III) DRYING AND CALCINING THE FORMED SUPPORT, (IV) IMPREGNATING THE CALCINED SUPPORT WITH AN AQUEOUS ORTHOPHOSPHORIC ACID SOLUTION OF A NICKLE SOURCE AN A MOLYBDENUM SOURCE SO AS TO PROVIDE ON SAID SUPPORT FROM ABOUT 1.0 TO 3.5 WEIGHT PERCENT PHOSPHORUS, FROM ABOUT 1 TO 6 WEIGHT PERCENT NICKEL OXIDE, AND FROM ABOUT 1/ TO 2/ WEIGHT PERCENT MOLYBDENUM OXIDE, SAID PERCENTAGES BEING BASED ON THE TOTAL CALCINED WEIGHT OF SAID CATALYST AND THE TOTAL PERCENTAGE OF MOLYBDENUM OXIDE RESULTING FROM SAID SUPPORT AND IMPREGNATION BEING GREATER THAN 20 WEIGHT PERCENT AND LESS THAN ABOUT 35 WEIGHT PERCENT BASED ON THE WEIGHT OF THE CALCINED CATALYST, AND (V) DRYING AND CALCINING THE IMPREGNATED SUPPORT.