Design, manufacture, installation and commissioning of burnt oil line by vacuum thin film distillation separation processes in the form of EPCF contract. Recharges chemical additives (acid and soil) which is a very cost-effective method. The base oil produced by this process is in accordance with the standards of the American Petroleum Institute (API) or ACEA Europe, which is a good nutrition for Codification and formulation of a wide range of car oils, turbine, hydraulic, gear, grease, etc. In this technology, by controlling temperature and pressure, various cuts can be produced, including SN150, SN350, SN500 and other required cuts.