Experimental study and thermodynamic modeling of phase equilibrium (liquid-liquid and liquid-vapor) of systems regarding phenol industry / Estudo Experimental e modelagem termodinamica do equilibrio de fases (liquido-liquido e liquido-vapor) de sistemas de interesse da industria de fenol

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Studies concerning physical and chemical phenomena are very important for the chemical industry, form the early stages of design up to full plant operation. Among the many units that make up a chemical plant, the last steps of separation and purification stands as the most expensive. Phenol, used to produce resins as well as other products, is an important feedstock to petrochemical industries. Two distillations columns and one decanter are used to purify phenol and separate cumene in the phenol production process, in which phase equilibrium plays an important role. In a tray distillation tower, one may find two liquid phases and one vapor phase in equilibrium (VLLE). Although possible, attempts to describe this equilibrium condition from two phase equilibrium conditions, either liqui-liquid (LLE) or vapor-liquid (VLE), haven t succeed. The objective of this work was to study the LLE and VLE of systems comprising components of the phenol production process, i.e., water, acetone, cumene, phenol and ?alfa?-methyl styrene, at conditions close to the liquid-liquid-vapor equilibrium. Equilibrium data were successfully obtained at 50 DEGREES C and ?60 DEGREES?C and at 760 mmHg for a variety of compositions. Unfortunately data at high acetone contents could not be obtained due to the high pressure generated in the experimental apparatus... Note: The complete abstract is available with the full electronic digital thesis or dissertations

ASSUNTO(S)

phenols equilibrio liquido-liquido equilibrium liquid-liquid modeling modelagem de dados termodynamics termodinamica equilibrium liquid-vapor fenois equilibrio liquido-vapor

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