FIELD: lubricant materials. SUBSTANCE: spent oil is heated, water is distilled off and light fractions were treated with polymethylsiloxane at the volume ratio polymethylsiloxane : oil = (2-10):1, at 15-50 C, under pressure 1.0-1.5 kgf/cm.sq followed by fractional distillation in thin-film evaporator at 240-350 C, under pressure 2-10 mm mercury column. EFFECT: improved method of oil regeneration. 1 tbl
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