METHOD FOR SELECTIVE PURIFICATION OF PETROLEUM OIL FRACTIONS (VERSIONS) Russian patent published in 2011 - IPC C10G21/16 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for selective purification of petroleum oil fractions, carried out via counter-flow contact of material with a selective solvent in an extraction column to obtain therein raffinate and extract solutions, followed by reclamation of the solvent from these solutions to obtain a raffinate and an extract, where the solvent outside the extraction column interacts with part of the raffinate solution and the obtained mixture is fed into the extraction column. The invention also relates to other versions of the selective purification method.

EFFECT: improved technological parameters of the process, high collection and quality of the raffinate.

9 cl, 1 tbl, 7 dwg