Calculation of critical point coordinates of ternary miscibility gap from experimental tie-lines

Goutaudier, C.; Bonnet, Fabrice; Tenu, R.; Baudouin, Olivier; Counioux, J.J.

doi:10.1016/j.cherd.2014.06.026

Cited by 3 publications

(1 citation statement)

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“…Other methods were invented based on liquid–liquid extraction by a well-chosen organic solvent for purifying phosphoric acid . In general, organic solvents are increasingly used and the choice of a solvent, or a mixture of solvents, is extremely varied . Several investigations were carried out to choose the solvent used for the purification of phosphoric acid according to its selectivity characteristics and the feasibility of solvent regeneration.…”

Section: Introductionmentioning

confidence: 99%

Liquid–Liquid–Solid Equilibria in the Ternary System Water–Phosphoric Acid–Cyclohexane at 25 and 35 °C: Stability Domain of Hemihydrate and Anhydrous Phosphoric Acid

Bakher

Kaddami

2018

J. Chem. Eng. Data

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The water−phosphoric acid−cyclohexane ternary system was studied at 25 and 35 °C under atmospheric pressure, and the binodal curve was determined by the cloud-point method. In addition, the isoplethic section between 2H 3 PO 4 •H 2 O−cyclohexane was investigated using a Tammann diagram based on the thermal analysis of different samples with the determination of hemihydrate melting temperature. The concentration of phosphoric acid and cyclohexane was assayed by volumetric titration and gas chromatography, respectively; the amount of water was calculated by the material balance equation. The miscibility between phosphoric acid and cyclohexane was found to be very low with the appearance of a three-phase stability domain liquid−liquid−solid by the presence of phosphoric acid crystals: hemihydrate (2H 3 PO 4 •H 2 O) and anhydrous phosphoric acid (H 3 PO 4 ).

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Section: Introductionmentioning

confidence: 99%