FIELD: technological processes.
SUBSTANCE: invention relates to fat and oil industry. Use of at least one vegetable oil refining industry by-product to obtain a purified total unsaponifiable of vegetable oil cleared of impurities initially present in said by-product, advantageously cleared of sapid and odorous compounds and/or chemical compounds resulting from deterioration and degradation of vegetable oils. Impurities are removed during at least one step of entrainment using stripping carrier gas with temperature gradient and vacuum preferably at a temperature rising from 80 to 250 °C at the rate of 0.5 °C/min up to 2 °C/min and vacuum, falling from 50 to 1 mbar at a rate of 0.1 to 10 mbar/min. Method of producing purified total unsaponifiable of vegetable oil and at least one by-product including following sequence of steps: saponifying in hydroalcoholic medium by a potash-type alkaline base, liquid-liquid extraction by an organic solvent, washing organic extract with water, evaporating organic solvent from washed extract, and then carrier gas stripping under vacuum with vacuum and temperature gradient.
EFFECT: invention provides a method for selective removal of impurities from total unsaponifiables extracted from industrial oil treatment.
26 cl, 1 dwg, 10 tbl, 8 ex
