Supercritical perstraction process

Details Supercritical perstraction process Supercritical perstraction process

1994-04-15

1995-07-04

McFarlane, Anthony

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By membrane, selective septum, or coalescer

585819, 210644, 210648, 210650, C07C 7144, B01D 1100

Patent

active

054302242

ABSTRACT:
A feed stream comprising a mixture of at least two separable components is separated into a permeate rich in one or more components and a retentate lean in those same components by a process comprising dissolving the feed in a supercritical solvent under supercritical conditions to produce a solution and contacting the solution with a dense, non-porous perstraction membrane having a first and a second surface, said contacting being along a first surface, wherein a portion of the feed dissolves into the first surface of the membrane, migrates through the perstraction membrane under a concentration gradient and emerges from the membrane at the second surface, as a permeate, the permeate being removed from the second surface by use of a sweep fluid comprising a supercritical solvent at supercritical conditions which may be the same as or different from the supercritical solvent in which the feed is dissolved.

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