TY - JOUR
T1 - Strong anion exchange recovery of aqueous dicarboxylates
T2 - Extraction and sorption equilibrium comparison
AU - López-Garzón, Camilo S.
AU - van der Wielen, Luuk A M
AU - Straathof, Adrie J J
PY - 2017/3/24
Y1 - 2017/3/24
N2 - Ion-exchange can be used for primary recovery of aqueous dicarboxylic acids at neutral pH, where there is almost complete acid dissociation. The equilibria of anion exchange of aqueous dicarboxylate anions (fumarate, itaconate, malate and succinate) with anions (Cl− and OH−) bound to quaternary ammonium compounds (Aliquat extractant and Dowex sorbent) were quantified. All equilibria could be described by the same model. The four dicarboxylates behaved similarly, and were exchanged by two Cl− or OH− anions. Sorption gave a much better exchange than extraction and OH− gave a much better exchange than Cl−. In batch equilibrium experiments most Cl− is not exchanged by dicarboxylate, pointing at the importance of column operation.
AB - Ion-exchange can be used for primary recovery of aqueous dicarboxylic acids at neutral pH, where there is almost complete acid dissociation. The equilibria of anion exchange of aqueous dicarboxylate anions (fumarate, itaconate, malate and succinate) with anions (Cl− and OH−) bound to quaternary ammonium compounds (Aliquat extractant and Dowex sorbent) were quantified. All equilibria could be described by the same model. The four dicarboxylates behaved similarly, and were exchanged by two Cl− or OH− anions. Sorption gave a much better exchange than extraction and OH− gave a much better exchange than Cl−. In batch equilibrium experiments most Cl− is not exchanged by dicarboxylate, pointing at the importance of column operation.
KW - Dicarboxylates
KW - Extraction
KW - Ion exchange equilibrium
KW - Sorption
UR - http://www.scopus.com/inward/record.url?scp=84996563497&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2016.11.018
DO - 10.1016/j.seppur.2016.11.018
M3 - Article
AN - SCOPUS:84996563497
SN - 1383-5866
VL - 175
SP - 9
EP - 18
JO - Separation and Purification Technology
JF - Separation and Purification Technology
ER -