LIQUID-LIQUID EQUILIBRIUM OF THE THREE LIQUID PHASES AT EQUILIBRIUM SYSTEM WATER-PHOSFHORIC ACID-DI-ISOPROPYL ETHER AT 25 AND 40^°C.

Abstract

ABSTRACT Solubility and liquid-liquid equilibrium data have been obtained for the ternary system Water-Phosproric Acid-Di-isopropyl Ether at 25 and 40°C. This system presents a three-phase1 region at bcth temperatures. Data for the tie lines end the solubility curve in the zone above the three-phase region at 25°C have been obtained by analyzing the phcsphcric acid and the di-isopropyl ether composition in the conjugated phases. Di-isoprcpyl ether i"as analyzed by NMR, using acetic acid as internal standard. It was impossible to apply conventional cloud point method to this zone due to the presence of an isooptic region.