TECHICAL Series MATHEMATICS  INFORMATICS  PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
The Influence of the Molecular Interaction on the Solubility of Propylene and Propane in Different Solvents
(Universitatea Petrol ? Gaze din Ploieşti,Bd. Bucureşti 39, Ploiesti e-mail: mpetre@upg-ploiesti.ro)
Vol LX • No. 4/2008
Mihaela Petre
Universitatea Petrol ? Gaze din Ploieşti,Bd. Bucureşti 39, Ploiesti
e-mail: mpetre@upg-ploiesti.ro

 Keywords   propylene, propane solubility, solvents, molecular interaction parameter

 Abstract
This paper presents an experimental study regarding the solubility of propylene and propane in three solvents with multiple industrial applications: N-methylpirrolidone (NMP) and dimethylformamide (DMF), propyleneglycol (PG) at the temperatures of 293.15 K, 315.15 K and 333.15 K and pressure of 306-368 KPa. The solubility of propylene and propane depends not only on temperature and pressure, but also on the chemical nature of the solvent. In order to compare the experimental results and to show the effect of the solvent's nature, the solubility of the propylene and propane is expressed under the form of the molecular interaction parameter (mip). At the same temperature and pressures, the effect of the solvent's structure can be summarized as:
mip propylene in DMF > mip propylene in NMP > mip propylene in PG;
mip propane in NMP > mip propane in DMF > mip propane in PG

 Rezumat
Lucrarea de fata prezinta un studiu experimental privind solubilitatea propilenei şi propanului in trei solventi cu multiple aplicatii industriale: n-metilpirolidona (NMP), dimetilformamida (DMF) si propilenglicol (PG), la temperaturile de 293.15, 313.15 si 333.15 K si presiuni de 306?368 kPa. Solubilitatea propilenei si propanului depinde nu numai de temperatura si presiune, dar si de natura chimica a solventului. Pentru a compara rezultatele experimentale si a pune in evidenta efectul naturii solventului, solubilitatea propilenei şi propanului se exprima sub forma parametrului de interactiune moleculara (pim). La aceeasi temperatura si presiune, efectul naturii solventului poate fi sumarizat astfel:
pim propilena in DMF> pim propilena in NMP> pim propilena in PG,
pim propan in NMP> pim propan in DMF> pim propan in PG.



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