FIELD: chemical technology. SUBSTANCE: method involves countercurrent contact of raw feeding to extractor mean part with solvent feeding to its upper part in the presence of antisolvent feeding to bottom part followed by solvent regeneration from raffinate and extract solutions and raffinate and extract are obtained. Part of extract is recovered to extractor at temperature not above that of solvent feeding but not lower that of raw feeding and this step is carried out between solvent and antisolvent feeding. Invention can be used in liquid extraction processes, in part, at oil processing, in units for selective refining oily fractions with different solvents (phenol, furfurol, N-methylpyrrolidone and others). EFFECT: increased yield of raffinate. 2 dwg , 3 tbl
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Authors
Dates
1998-05-27—Published
1995-01-13—Filed