METHOD FOR PRODUCTION OF LOW-FREEZING BASE FOR HYDRAULIC OILS

摘要

petrochemical processes. SUBSTANCE: long diesel fraction is subjected to hydrofining in presence of alumino-nickel-molybdenum catalyst and then close-cut fraction (270-340 C) is isolated from hydrogenizate, which is subjected to extensive deparaffination at temperature no higher than -62 C in presence of methyl ethyl ketone and toluene at volume ratio 60:40. EFFECT: improved yield of low- freezing base and improved low-temperature and fare-safety properties. 2 dwg, 5 tbl, 7 ex