A residue from a Maya crude was hydroprocessed in a continuous hydroprocessing unit provided with a continuous stirred-tank reactor. The kinetic study of Conradson carbon residue (CCR) conversion was carried out, and the data of CCR conversion fit half-order kinetics, with the activation energy being 277.58 kJ/mol. No dependence of the rate constants on hydrogen pressure was observed. The relationship between CCR and different parameters was studied, and it was found that asphaltenes, hydrogen content, WC atomic ratio, and residue content (350 degrees C) were linearly related with CCR content. Gas yield was also found to be linearly related with CCR conversion. A structural analysis was carried out by C-13 NMR and H-1 NMR, and a linear relationship was found between CCR and aromatic carbon contents for the. products obtained at 415 degrees C, when the products obtained at the same temperature are compared. However, a general relationship for all temperatures was not found.