Abstract: The oily Fischer-Tropsch wax was deoiled using MEK-toluene solvent. The solubilities of wax before and after deoiling in different solvents were tested. The results show that MEK-toluene mixed solvent is a suitable solvent for deoiling of the F-T wax. The XRD was used for analysis of wax crystal structure and DSC was used to measure the melting point of the waxes before and after deoiling. DSC results indicate that the melting point of the deoiled F-T wax is 90.68℃ and only has one melting peak without obvious solid-solid crystal transition, which is different from petroleum wax.

Key words: Fischer-Tropsch wax, solvent, solubility, thermal properties, crystal structure