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Isobaric vapor−liquid equilibrium data for binary system of glycerol ethyl acet...
Constantino, D.S.M.; Pereira, C.S.M.; Pinho, Simão; Silva, V.M.T.M.; Rodrigues, A.E.Isobaric vapor−liquid equilibrium (VLE) data for the binary mixture of glycerol ethyl acetal (GEA) and acetonitrile were measured at 60.0 kPa and 97.8 kPa, using a dynamic recirculating still. The VLE data were correlated using the nonrandom two-liquid (NRTL) and universal quasichemical activity coefficient (UNIQUAC) models, and the interaction parameters of this mixture were estimated. The experimental procedu...
Synthesis of 1,1-dibutoxyethane in a simulated moving bed adsorptive reactor
Graça, N.S.; Pais, L.S.; Silva, V.M.T.M.; Rodrigues, A.E.The synthesis of 1,1-Dibutoxyethane was carried out in a Simulated Moving Bed pilot unit LICOSEP 12-26 (Novasep, France) with 12 columns packed with the commercial ionexchange resin Amberlyst 15 (Rohm & Haas, France). Experimentally it was obtained a raffinate purity of 85% with a productivity of 5,04 Kg.L-1.d-1 and a desorbent consumption of 15, 5 L.Kg-1. The influence of the different operation parameters was...
Dynamic study of the synthesis of 1,1-dibutoxyethane in a fixed-bed adsorptive ...
Graça, Nuno S.; Pais, L.S.; Silva, V.M.T.M.; Rodrigues, A.E.The synthesis of 1,1-Dibutoxyethane in a fixed-bed adsorptive reactor using Amberlyst 15 was studied for the first time. The adsorption of non-reactive pairs was investigated experimentally, at 25 °C, by frontal chromatography in a fixed-bed adsorber. In order to avoid the immiscibility of the liquid phase, the liquid-liquid equilibrium for the mixture 1-butanol/water was studied. The multicomponent equilibrium...
Process intensification for the ethyl lactate synthesis : integrated pervaporat...
Pereira, C.S.M.; Silva, V.M.T.M.; Pinho, Simão; Rodrigues, A.E.Ethyl lactate is an important organic ester, which is biodegradable, produced by renewable resources and can be used as food additive, perfumery, flavor chemicals, solvent and pharmaceutical preparations[1]. It is a green solvent and could replace a range of environment-damaging halogenated and toxic solvents (for example: Nmethylpyrrolidone, toluene)[2]. The conventional way to produce ethyl lactate is the est...
Oxygenated biofuels from butanol for diesel blends: synthesis of the acetal 1,1...
Graça, Nuno S.; Pais, L.S.; Silva, V.M.T.M.; Rodrigues, A.E.The synthesis of 1,1-dibutoxyethane or acetaldehyde dibutylacetal was studied in a batch reactor by reacting butanol and acetaldehyde in a liquid phase, using Amberlyst-15 as the catalyst. The reaction equilibrium constant was experimentally determined in the temperature range 20-40 °C at 6 atm, where Ka = 0.00959 exp[1755.3/T (K)]. The standard properties of the reaction at 298.15 K were estimated: ΔH° = -14.5...
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