Current Technology

At present, there are two main destinations for the recycling of waste lubricating oil, producing fuel oil or regenerating lubricating oil. In terms of technology, environmental protection, resource utilization and economics, waste lubricating oil is recycled to generate new lubricating oil. It is more reasonable, efficient and valuable. The domestic traditional waste lubricating oil regeneration process mainly includes processes such as “settling-extraction-distillation-white earth refining”, “distilling-acid washing-white earth refining”, and “distilling-sugar refining-white earth refining”. Compared with the traditional domestic secondary pollutants and low recovery rate, the existing waste lubricating oil regeneration process in foreign countries mainly includes the KTI process jointly developed by International Power Technology Company and Gulf Technology Company, and the REVIVOIL process developed by Viscolube Company of Italy. UOP (Wan Guo Oil Products Co., Ltd.) develops and licenses the HyLube process used by PURALUBE (Germany) Co., Ltd., mostly based on distillation-hydrogenation process, and has developed into a new process with high efficiency, low cost and less environmental pollution. trend. The advantages and disadvantages of the process are shown in Table 1. In general, due to the problems of high pollution, high energy consumption, insufficient resource utilization, and low recovery rate of traditional waste lubricating oil regeneration technology, and considering the continuous improvement of national environmental protection regulations, the development of small pollution, base oil The new waste lubricating oil combination regeneration process with high recovery rate, low economic cost and high quality of reclaimed oil has become the main research direction in the field of waste lubricating oil regeneration.