APPARATUS AND METHOD OF EXTRACTING HEAVY HYDROCARBONS FROM SOLVENT STREAM Russian patent published in 2013 - IPC C10G1/04 C10G21/28 C10G53/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of removing heavy hydrocarbons from a solvent stream, which involves: a) feeding a first batch of a mixture containing heavy hydrocarbons dissolved in at least one solvent, b) extracting the first batch of the mixture by washing with light hydrocarbons, c) washing the first batch of the mixture through first water washing. Washing with light hydrocarbons and the first water washing result in a stream solvent poor in heavy hydrocarbons and a stream of heavy hydrocarbons dissolved in light hydrocarbons. Further, step d) of removing the solvent stream poor in heavy hydrocarbons, e) washing the stream of heavy hydrocarbons dissolved in the light hydrocarbons through second water washing, f) removing water after second washing and g) extracting the output stream containing heavy hydrocarbons dissolved in light hydrocarbons, wherein the solvent stream includes a closed solvent stream. The invention also relates to two versions of the apparatus.

EFFECT: use of the present invention makes processing more efficient and enables to obtain heavy hydrocarbons in a form suitable for further processing.

14 cl, 2 dwg