FIELD: metal working, chemical industry and others. SUBSTANCE: method involves separation of organic impurities. The process is carried out by extraction of, 10-13 % of extragent being used. Isoamyl, isobutyl alcohol and others are used as said extragent. Phosphoric acid (its quantity being 1.0-1.3 vol %) and lime milk (its quantity being 4-5 mass %) are added into synthetic and semisynthetic lubricating and cooling liquids during said extraction, the process is carried out till pH is 5-6. EFFECT: improved efficiency of the method. 1 dwg
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