Method and apparatus for recovering carboxylic acids from dilute

Details Method and apparatus for recovering carboxylic acids from dilute Method and apparatus for recovering carboxylic acids from dilute

1995-06-07

1997-04-29

Fortuna, Ana

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210651, 210652, 210653, 210655, 203 10, 203 14, 203 15, 203 43, 203 48, B01D 6100

Patent

active

056245661

ABSTRACT:
A method for recovering carboxylic acids from a dilute aqueous solution thereof having a concentration below about ten percent (10%) by weight, which includes passing the dilute acid solution through a reverse osmosis separator, thereby producing a permeate substantially free of acid and a retentate having an acid concentration above about ten percent (10%) by weight. The retentate is contacted with a liquid extractant for acids to produce an acid-rich extractate and an acid-free raffinate. The acid is then recovered from the acid-rich extractate.

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patent: 4909939 (1990-03-01), Richelton et al.
patent: 5250182 (1993-10-01), Bento et al.
patent: 5492625 (1996-02-01), Wytcherley et al.

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