CO2 + Methanol + Glycerol: Determination of the Compositions in VLLLE From a Synthetic Method-Based Experiment/Theoretical Procedure

The experimental synthetic-based method is a straightforward procedure to obtain a complete resolution of the phase behaviour of VLE of binary mixtures; however, it has limited applicability for multicomponent mixtures/multiphase phenomena. The analytical method is an alternative that offers a reasonable solution for complex configurations, however, the investment of time and resources is high. A straightforward alternative presented in this work consists on the application of the synthetic method allied to a theoretical procedure in order to obtain the composition of the existent phases in equilibrium in complex system’s configurations. The case study is a CO2 + methanol + glycerol mixture that at concrete conditions of global composition, pressure and temperature leads to VLLLE. The composition of each phase in equilibrium was determined using the Peng-Robinson EOS with Mathias-Klotz-Prausnitz mixing rule allied to a combination algorithm to find and check the suitable arrangement of derived compositions that respect the thermodynamic criteria of equilibria, balance of masses and order of densities. A single solution was obtained and discussed along the manuscript.authorsversionpublishe

Method for direct treatment of cork stoppers, using supercritical fluids

This invention describes a method which permits direct treatment of natural cork stoppers, using supercritical fluids with the aim to eliminate or significantly reduce the quantity of cork contaminants, namely 2, 4, 6-trichloroanisole. The process uses a separating device which permits natural cork stoppers to go through compression/decompression cycles without losing their shape and maintaining their sealing properties. This invention refers also to the natural cork stoppers treated by this method