Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1995-02-28
1996-11-19
Fortuna, Ana
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210634, 210638, 210639, 210651, 210805, 210511, B01D 6100, B01D 1100, B01D 1504
Patent
active
055759181
ABSTRACT:
A process for the separation of naphthalenesulfonate-based carbonyl condensates from water is provided. The process comprises contacting a mixture comprised of water and a naphthalenesulfonate-based carbonyl condensate (preferably a material selected from the group consisting of formaldehyde condensates of naphthalenesulfonic acids, formaldehyde condensates of lower-alkyl substituted naphthalenesulfonic acids, and mixtures of two or more of such materials) with a liquid organic phase comprised of a lipophilic non-quaternary amine to form an aqueous phase depleted with respect to said mixture of naphthalenesulfonate-based carbonyl condensate and a liquid organic phase enriched in naphthalenesulfonate-based carbonyl condensate. The process further comprises separating said aqueous phase depleted with respect to said mixture of naphthalenesulfonate-based carbonyl condensate and said liquid organic phase enriched with respect to naphthalenesulfonate-based carbonyl condensate. The process further comprises stripping the enriched liquid organic phase by contacting with an alkaline stripping solution to regenerate the cationic lipophilic amine, recycling the alkaline stripping solution for contacting with a further portion of enriched liquid organic phase. The alkaline stripping solution may then be treated by nanofiltration to separate inorganic salts from the polymeric naphthalenesulfonate-based carbonyl condensate.
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Mattison Phillip L.
Virnig Michael J.
Weerts Keith E.
Fortuna Ana
Henkel Corporation
Jaeschke Wayne C.
Szoke Ernest G.
Wood John Daniel
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