AbstractThis paper deals with the separation of microcrystalline wax (ceresin) from the Soviet Tuimasa heavy oil, using an ABT mixture. Structure investigation was performed using different methods of analysis such as fractional crystallisation, n‐d‐method, Grodde analysis, elementary analysis, urea adduction and adsorption analysis. It was concluded, that this wax was mostly composed of di‐ and tricyclic paraffinic comp