METHOD OF OILY FRACTION SELECTIVE REFINING Russian patent published in 1998 - IPC

Abstract RU 2112009 C1

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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RU 2 112 009 C1

Authors

Ziganshin G.K.

Osintsev A.A.

Dates

1998-05-27Published

1995-01-13Filed