METHOD FOR OBTAINING NATURAL SOLIDOL Russian patent published in 2022 - IPC C10M117/02 C10M125/02 C10M159/02 C10M161/00 C10M163/00 C10N40/00 

FIELD: lubricants.

SUBSTANCE: invention relates to a method for producing natural solidol. 1/2 part of the mass of spent purified engine oil is mixed with unrefined sunflower vegetable oil heated to 60-80°C, and lime milk is added, saponified at a temperature of 95-100°C for at least 1 hour, then the remaining 1/2 part of the used engine oil is added. In the process of preparing lime milk, a 0.2 mol/l sodium hydroxide solution containing graphite with a plate thickness of less than 100 nm and a concentration within 15-850 ppm of the solidol mass is used as the liquid phase. Graphite is obtained in sodium hydroxide solution by electrochemical delamination of thermally expanded graphite foil.

EFFECT: simplification of the process of obtaining natural solidol with improved characteristics due to the introduction of graphite with a plate thickness of less than 100 nm with a fraction of no more than 850 ppm.

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