OM-52 is an organic mixture composed of n-dodecane, n-pentadecane, n-tetradecane, and n-pentadecane, insoluble in water. This product is a high-purity n-alkane, which is obtained from the separation of Fischer Tropsch products. The high efficiency distillation separation technology of Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, is used for product separation, and the multi tower continuous process is used. The Fischer Tropsch products are cut in the distillation tower according to the distillation range. The product can be used for phase change heat storage, temperature sensing and control, power batteries, industrial waste heat recovery, power peak shaving, electronic component constant temperature, and military aerospace fields; Precision casting, etc.