Hydrodesulfurization catalyst and method of preparing same

Claim 1

A PROCESS FOR THE PREPARATION OF IMPROVED HYDRODESULFURIZATION CATALYST WHICH COMPRISES MIXING AN AQUEOUS SOLUTION OF AN ALKALI METAL SILICAT HAVING A RATIO OF ALKALI METAL OXIDE TO SIO2 OF AT LEAST 0.8 TO 1 WITH A SOLUTION OF SODIUM ALUMINATE HAVING A RATIO OF NA2O TO AL2O3 OF 1/1 TO 3/1 AT A TEMPERATURE OF ABOUT 160* TO ABOUT 250*F. IN PROPORTIONS GIVING A RATIO OF SIO2 TO AL2O3 IN THE MIXTURE OF 2.2/1 TO 10/1, MAINTAINING SAID ELEVATED TEMPERATURE FOR AT LEAST ONE HOUR UNTIL CRYSTALLINE SODIUM ALUMINO-SILICATE IS FORMED, RECOVING THE CRYSTALLINE SODIUM ALUMINO-SILICAT HAVING A PORE DIAMETER OF UP TO ABOUT 13A., AND OF SIZE NECESSARY FOR ADSROPTION OF AROMATIC MOLECULES, BASE EXCHANGING THE SODIUM ALUMINOSILICATE WITH A COBALT SOLUTION TO REPLACE AT LEAST 50% OF THE SODIUM IONS WITH COBALT IONS AND INCORPORATING FROM ABOUT 5 TO 20 WT. PERCENT OF MOO3 WITH THE RESULTANT COBALT ALUMINO-SILICATE.