Atmospheric distillation of hydrocarbons-containing liquid strea

Details Atmospheric distillation of hydrocarbons-containing liquid strea Atmospheric distillation of hydrocarbons-containing liquid strea

1998-10-20

1999-10-05

Griffin, Walter D.

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By membrane, selective septum, or coalescer

208350, 208349, 208356, 585802, 203DIG19, B01D 300, B01D 334, C07C 7144, C07C 700

Patent

active

059627638

ABSTRACT:
A method of distilling a crude oil and a contaminated liquid stream in an atmospheric distillation column (2) comprising the steps of (a) heating (13, 15) the crude oil at atmospheric pressure and introducing the heated crude oil into the inlet section (10) of the column (2); (b) removing from bottom a residue (19), removing from the top an overhead (20) and removing from the rectification section (7) at least one side stream (26, 28); (c) cooling (13) one of the side streams (28) and introducing the cooled side stream (29) into the rectification section (7) and partly condensing (21) the overhead (20) and introducing the condensed fraction (24) into the upper end of the distillation column (2); (d) supplying the contaminated liquid stream (40) to a membrane unit (3) provided with a suitable membrane (33), and removing a permeate (37) and a retentate (36); and (e) introducing the permeate (37) into the rectification section (7) and adding the retentate (36) to the crude oil (11) upstream of the furnace (1).

REFERENCES:
patent: 4191640 (1980-03-01), Chess et al.
patent: 4626321 (1986-12-01), Grethlein et al.
patent: 4793841 (1988-12-01), Burr

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