Reactive extraction of citric acid using supercritical carbon dioxide

Małgorzata Djas , Marek Henczka


This paper presents the results of investigations into reactive extraction of citric acid from an aqueous solution using supercritical carbon dioxide (scCO2) and tri-n-octylamine (TOA). The effect of initial citric acid concentration (0.07–1.04 mol dm−3), pressure (8–16 MPa) and temperature (35–65 °C) on reactive extraction efficiency was identified. The reactive extraction process was conducted in both batch mode and semi-continuous mode. The study concluded that the reactive extraction using TOA as a reactant and scCO2 is an efficient method of citric acid separation. Reactive extraction efficiency increases with an increase in pressure, while an increase in temperature decreases the extraction yield. Reactive extraction of citric acid conducted in semi-continuous mode results in high process efficiency (96.9%). Moreover, the formation of (1,1) acid-amine complexes was reported for the considered initial citric acid (0.01–0.04 mol dm−3) and TOA (0.04–0.07 mol dm−3) concentrations.
Author Małgorzata Djas (FCPE / DCRED)
Małgorzata Djas,,
- Department of Chemical Reactor Engineering and Dynamics
, Marek Henczka (FCPE / DCRED)
Marek Henczka,,
- Department of Chemical Reactor Engineering and Dynamics
Journal seriesJournal of Supercritical Fluids, ISSN 0896-8446
Issue year2016
Publication size in sheets0.5
Keywords in Englishreactive extraction, supercritical carbon dioxide, citric acid, tri- n -octylamine
ASJC Classification1606 Physical and Theoretical Chemistry; 3104 Condensed Matter Physics; 1500 General Chemical Engineering
Languageen angielski
Djas M., Henczka M. - Reactive extraction of citric....pdf 936.28 KB
Score (nominal)35
Score sourcejournalList
ScoreMinisterial score = 35.0, 24-04-2020, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 24-04-2020, ArticleFromJournal
Publication indicators WoS Citations = 10; Scopus Citations = 9; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.302; WoS Impact Factor: 2016 = 2.991 (2) - 2016=2.842 (5)
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