Liquid-liquid equilibrium in systems including aromatic hydrocarbons, aliphatic and sulfolane / Equilibrio liquido-liquido em sistemas contendo hidrocarbonetos aromaticos, alifaticos e sulfolano

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

An important stage within the processes in the petrochemical industry uses the solvent sulfolane in the recovery of high-purity aromatic hydrocarbons. These aromatic compounds are separated from the aliphatic hydrocarbons through solvent extraction, since distillation is not suitable. Experimental data of the multicomponent liquid-liquid equilibrium are essential for the project, the operation and the optimization of the extraction process. For ternary systems involving aromatic hydrocarbon + aliphatic hydrocarbon + sulfolane there are several studies in the literature; however, data for quaternary and quinary systems are still scarce, as well as data involving hydrocarbons with carbon number greater than nine. The main objective of this work was to determine data of liquid-liquid equilibria for quaternary systems of the type aliphatic + aliphatic + aromatic + sulfalano and quinary of the type aliphatic + aliphatic + aromatic + aromatic + sulfolano at two temperatures, 25 and 40 DEGREES C. The aliphatic hydrocarbons were nonane and undecane, while the aromatics were benzene, toluene and m-xylene. The experimental determination was accomplished by gas chromatography, with flame ionization detection. The experimental methodology was validated through the experimental reproduction of the literature data involving aromatic hydrocarbons, aliphatic and sulfolane for a ternary system, a quaternary one and a quinary one at 25 DEGREES C... Note: The complete abstract is available with the full electronic digital thesis or dissertations.

ASSUNTO(S)

liquid-liquid equilibrium aromatic compounds thermodynamic compostos aromaticos equilibrio liquido-liquido termodinamica

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