Abstract
The pro-ecological production processes in enterprises require minimising the amount of generated waste products, for example, by processing them and recycling. Often, spent plastic lubricants do not meet performance requirements in only some of their properties, and after physiochemical treatment, they can be used in places with lower performance requirements. This article presents a multi-stage method, a device for the purification of used lubricants, and ways to modify the purified products in plastic cold forming. The tests were conducted on a mixture of lubricants after slotted filtration treatment and chemical composition adjustment. The efficiency of lubricant purification was evaluated. Physicochemical and functional properties related to the performance of final products were determined. It was found that, as a result of the applied purification processes and chemical composition modification, the obtained products were characterized by high durability, meeting the requirements of lubricants for cold forming.
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