Abstract: Chemical reactors in the industry had been widely used due to his main functionality of control the chemical reactions through his design in order to promote a specific reaction between multiple options. To achieve the objective, it is necessary the knowledge of physicochemical properties of each compound present at the in and out flow of the reactor. To predict these properties, it was used the Peng-Robinson equation of state, the inlet flow was obtained from the residues of an atmospheric distillation column of crude oil which were completely oxidized to their more stable state. Furthermore, a brief design of the reactor was made to develop the reactions. Finally, to resume the calculations of the reactor, the main operational features were characterized, to obtain a mathematical correlation of each variable for the purpose of facilitate the control of the reactor.