In order to produce ash-free coal (AFC) from three Turkish coals, solvent extraction of coals using 1-methylnaphthalene (1-MN) at different temperatures were conducted. The extraction yield of coals was found dependenton coal, temperature, and solvent type. When there was usage of 1-MN as solvent, the extraction yield was low. However,on addition of N-methyl-2-pyryrolidone (NMP) or quinoline (QN) into 1-MN, the extraction yield increased. Following theextractions, we obtained AFC with less than 0.65% ash content for the three coals used in this study. The response surfacemethodology (RSM) was employed to investigate the solvent extraction conditions. The factors investigated were extractiontemperature and additional polar solvent ratio. The obtained results demonstrated that either excess amount of polar solventinto 1-MN should be added at low temperatures or extraction should be done at high temperatures using less polar solvent toobtain an increase in extraction efficiency. The sensitivity and validity of results obtained by RSM were confirmed throughvalidation experiments. The results of validation experiments showed a good agreement between the experimental andpredicted values (relative error <1.2) and that indicated the robustness of the models