Sugar cane bagasse lignin was submitted to a liquefaction process with the aim of obtaining light oils. In order to increase the yields of light oils a study of the influence of experimental variables in the liquefaction process was performed. A 24 factorial design was used, involving two levels and four variables: temperature, pressure, solute/solvent ratio and time. It was observed that the variables time, temperature, and solute/solvent ratio influenced an increase in yield, and the variable solute/solvent ratio was independent, while the second-order effect among t x T, t X P was observed, and third-order among T X t X P occurs.