A thermodynamic study is reported on the chlorination of Fe (1-x)O, Fe 2O 3, Cr 2O 3, MgO, Mg 2SiO 4 with chlorine in the presence or the absence of reducing atmospheres. The reactivities of these compounds as well as that of Mg 3Si 2O 5(OH) 4 using Cl 2+N 2, Cl 2+air, and Cl 2+CO gas mixtures were studied by non isothermal thermogravimetric analysis between 20 and 1000 °C. The same solids were chlorinated in a horizontal experimental set during two hours between 350 and 1000 °C in reducing and oxidizing atmospheres. The chlorination products were examined by XRD and SEM, and possible reaction paths were examined. Results indicate that the carbochlorination of these solids was better than their chlorination. Furthermore, the carbochlorination was performed at lower temperatures than those of the chlorination. Finally, the reaction extent was higher in the case of carbochlorination of these compounds. Based on these results, a process was suggested for the selective recovery of chromium compounds from the chromite concentrate.