Regeneration of Waste Motor Oils Using Membranes (A Review)

The regeneration (purification) of waste oils for their subsequent reuse or for preparation of other kinds of lubricants (e.g., greases) is an essential step in the closed loop of petroleum products. Numerous approaches to waste oil valorization are known today. The use of membranes for waste oil treatment has a number of advantages and is an actively developing field of science and engineering. This review discusses the latest achievements in the use of membranes for reprocessing waste motor oils, taking into account their chemical composition and physicochemical characteristics influencing the membrane performance.