TY - JOUR
T1 - One-way extraction of a chemical potential through a liquid membrane
T2 - Concept demonstration and applications
AU - Lavie, Z.
AU - Rothenberg, G.
AU - Sasson, Y.
PY - 2001
Y1 - 2001
N2 - A novel concept for the preparation of hydroxide compounds using liquid/liquid anion exchange is presented. The exchange is accomplished by loading a chemical potential into a liquid organic membrane and subsequently releasing it from the membrane using an onium-alcoholate complex as the potential carrier. Accordingly, this method requires no electricity and no energy input other than a concentration gradient. The influence of the alcohol concentration and structure on the extraction equilibrium is studied. Alcohol acidity and stabilization of the alcoholate-quat ion pair are the key factors in determining the transfer efficiency. For example, diols are good coextractants, probably as a result of intramolecular hydrogen bonding that stabilizes the complex. The synthetic application of this concept to make CsOH, LiOH, KOH, and water-soluble tetraalkylonium hydroxides is examined. The extraction mechanism and the function of the organic membrane as a one-way transport medium and a "water pump" are discussed.
AB - A novel concept for the preparation of hydroxide compounds using liquid/liquid anion exchange is presented. The exchange is accomplished by loading a chemical potential into a liquid organic membrane and subsequently releasing it from the membrane using an onium-alcoholate complex as the potential carrier. Accordingly, this method requires no electricity and no energy input other than a concentration gradient. The influence of the alcohol concentration and structure on the extraction equilibrium is studied. Alcohol acidity and stabilization of the alcoholate-quat ion pair are the key factors in determining the transfer efficiency. For example, diols are good coextractants, probably as a result of intramolecular hydrogen bonding that stabilizes the complex. The synthetic application of this concept to make CsOH, LiOH, KOH, and water-soluble tetraalkylonium hydroxides is examined. The extraction mechanism and the function of the organic membrane as a one-way transport medium and a "water pump" are discussed.
UR - http://www.scopus.com/inward/record.url?scp=0035660642&partnerID=8YFLogxK
U2 - 10.1021/ie0104161
DO - 10.1021/ie0104161
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AN - SCOPUS:0035660642
SN - 0888-5885
VL - 40
SP - 6045
EP - 6050
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 26
ER -