Aromatic extraction with solvent recovery and regeneration

Details Aromatic extraction with solvent recovery and regeneration Aromatic extraction with solvent recovery and regeneration

C - Chemistry, Metallurgy

10

G

196/262, 362/45

C10G 21/28 (2006.01)

Patent

CA 1094497

ABSTRACT OF THE DISCLOSURE A solvent extraction process for separating po- lar hydrocarbon from non-polar hydrocarbons. The sol- vent-rich extract phase is introduced into a stripping column, the bottoms from which, being a polar hydrocarbon- containing, solvent-rich stream, is introduced into an up- per portion of a solvent recovery column. A first vapor- our stripping medium is introduced into a lower portion of the solvent recovery column. A portion of the solvent- rich stream, virtually free from hydrocarbons, withdrawn as a bottoms product, is introduced into a solvent regen- eration zone. the remainder being recycled to the extrac- tion zone. A second vaporous stripping medium is intro- duced into the solvent regeneration zone, recovered with regenerated solvent and introduced into the solvent recov- ery column as at least a portion of the first vaporous stripping medium.

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