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LIQUID-LIQUID EQUILIBRIUM OF THE WATER-PHOSPHORIC ACID-3-PENTANONE SYSTEM AT 25°C. A COMPARATIVE STUDY OF THE EXTRACTION POWER OF DIFFERENT SOLVENTS

1993; Taylor & Francis; Volume: 11; Issue: 3 Linguagem: Inglês

10.1080/07366299308918167

1532-2262

A. Marcilla, Francisco Ruíz, D. Martínez-Pons,

Various Chemistry Research Topics

Abstract Solubility and liquid-liquid phase equilibrium data have been determined for the Water-Phosphoric Acid-3-Pentanone ternary system at 25 °C. Tie lines have been obtained and the plait point composition calculated. The phosphoric acid extraction capability of 3-Pentanone has been compared to that of other solvents previously studied. A systematic approach to the effects of chain length, functional group, branching and cyclation on the extraction power of the different solvents reported in the literature shows that the compatibility between solvent and phosphoric acid is higher for alcohols followed by ketones, esters and ethers. Branching and cyclation lead to a higher solubility of the acid into the organic phase, while an increase in the chain length results in a wider heterogeneous zone (i.e. in a decreasing solubility).