DEVELOPMENT OF A METHOD FOR PURIFICATION AND UTILIZATION OF USED MOTOR OILS USING BENTONITE SORBENTS

The study examines modern approaches to oil regeneration, including physical, chemical, and sorption methods, and substantiates the choice of adsorption purification as an environmentally safe and technologically simple alternative. An effective method for the purification and utilization of used motor oils using natural and modified bentonite sorbents has been developed. The research objects included used KIXX 10W-40 motor oil, P1T1A and «13 Horizon» bentonites, as well as their modified forms obtained through acid and peroxide activation methods. Experimental studies were carried out using a vacuum oil purification unit and sorption filtration techniques. The purification efficiency was evaluated using FTIR spectroscopy, thermogravimetric analysis (TGA), and ICP-MS methods. The results demonstrated a significant reduction in water content, oxidation products, sulfur-containing compounds, and metal impurities. The highest efficiency was achieved with modified P1T1A bentonite, ensuring maximum contaminant removal. It was established that modification increases specific surface area and sorption capacity, enhancing adsorption processes. The proposed method is simple, cost-effective, scalable, and does not generate secondary toxic waste, making it suitable for industrial application while reducing environmental impact.

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