FIELD: lubricants.
SUBSTANCE: invention relates to improved method for preparation of high-acidity oil concentrate appropriate as a base for lubricating materials, in detergent production, un chemical and petrochemical industries, etc. Wasteless method of invention involves distillation of fat raw material, in particular sunflower oil, effected at 230-260оС and residual pressure 0.13-0.8 kPa and followed by supplementing distillate by 2,6-di-tetrt-butyl-4-methylphenol (ionol) at temperature, at which fatty acid vapors are condensed.
EFFECT: simplified technology, reduced time of high-temperature action on raw material and fatty concentrate, eliminated consumption of food vegetable oils, provided stability of fatty acid composition, and increased oxidation resistance of concentrate.
3 cl, 2 tbl, 7 ex
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