The purpose of hydroprocessing in the petroleum industry is to convert heavy oil, heavy distillates and/or residues into more valuable materials such as naphtha, gasoline, jet fuel and diesel fuel. This process consists in the catalytic hydrogenation together with thermal cracking in order to redistribute the hydrocarbons toward to light distillation cuts. 1 Both processes in series, allow upgrading more efficiently the feed, increasing the hydrogen to carbon ratio and reducing the formation of coke. In general terms, this process converts high