The preparation of zirconium sulfide catalysts has been carried out with various modifications of silica on the catalyst using potassium hydrogen phtalate as the supporting agent, namely ZrS-SiO2, ZrS-SiO2 template method potassium hydrogen phtalate and ZrS-SiO2 chelate method potassium hydrogen phtalate. The purpose of this study was to apply the catalyst during the hydrocracking process in th…