Method for aromatic hydrocarbon recovery

Details Method for aromatic hydrocarbon recovery Method for aromatic hydrocarbon recovery

1992-04-20

1993-04-13

McFarlane, Anthony

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By plural serial diverse separations

585807, 585835, 585857, 585866, 208311, 208321, 208325, 208334, C07C 700, C07C 710, C10G 1704, C10G 2128

Patent

active

052025209

ABSTRACT:
A method is provided for the recovery of aromatic hydrocarbons from the extract phase of aromatic-selective solvent extraction process which involves withdrawing a vapor side-cut fraction containing aromatic hydrocarbons and solvent from a stripping zone and passing the side-cut fraction to a rectification zone which can be refluxed with an aqueous condensate. The benefits of the invention are that the introduction of the rectification zone bottoms to the bottom of the stripping section provides an aromatic product comprising less than 100 wt. ppm. solvent, provides improved stripping over prior schemes, and reduces the flowrate of stripping medium throughout the stripping zone which results in energy saving.

REFERENCES:
patent: 3590092 (1971-06-01), Utti et al.
patent: 3702295 (1972-11-01), Thompson
patent: 3714033 (1973-01-01), Somekh et al.
patent: 4419226 (1983-12-01), Asselin

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