METHOD FOR SELECTIVE PURIFICATION OF OIL FRACTIONS

摘要

FIELD: chemical technology. SUBSTANCE: method is carried out in counterflow regime. Raw materials being fed into medium area of extractor is brought into contact with solvent being fed on upper theoretical plate of extractor, said contact takes place in the presence of antisolvent being fed on lower theoretical plate of said extractor. The process is followed by regeneration of solvent from extract and refined solution and by preparing of refine and extract. Portion of thus prepared extract is cooled to temperature being not more than temperature of supply of raw materials and is fed into lower area of said extractor higher than antisolvent has been fed. Portion of refined solution being prepared on upper theoretical plate of extractor is cooled to temperature not more than its temperature at output of the extractor and then it is fed into lower area of said extractor. EFFECT: improves quality of refined solution, improves efficiency of method.