Resumen

VASQUEZ, CÉSAR et al. PRODUCTION OF ANHYDROUS ETHANOL BY EXTRACTIVE DISTILLATION WITH SALT EFFECT. Dyna rev.fac.nac.minas [online]. 2007, vol.74, n.151, pp.53-59. ISSN 0012-7353.

The results about extractive distillation of water-ethanol mixtures with PAW polyalcohol containing CaCl2 and KCOOCH3 salts disolved in the polyalcohol, using a unitary volumetric relation water-ethanol mixture to polyalcohol and a concentration of 0.1 g/mL of each salt in the polyalcohol are presented. It was found that the polyalcohol PAW modified the water-ethanol azeotropic behavior as a function of the salt used. The PAW polyalcohol showed advantages concerning other separation agents previously used from standpoint of costs and water-ethanol azeotrope modification. A new extractive distillation industrial process using PAW polyalcohol disolved salts is proposed; it would modified the relative volatilities of the mixture, improving separation efficiency, diminishing energy requirements, size and equipment costs, avoiding solids handling and corrosion which are frecuently found in conventional separation processes.

Palabras clave : Water-ethanol; Azeotrope; Extractive distillation; Salt effect; Polyalcohols.

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