In the presence of Re2O7 supported on γ-Al2O3, the self-metathesis of 1-octene was conveniently carried out under continuous-ﬂow (CF) conditions using supercritical CO2 (scCO2) as a carrier. This investigation allowed optimization of reaction parameters, the best values of which were found to be 100 °C and 90 bar, operating at ﬂow rates of 0.05 and 1 mL min−1 for 1-octene and scCO2, respectively, the reaction proceeded with very good self-metathesis selectivity (>90%) and an average productivity of ∼0.24 mL tetradecene gRe −1 min−1 . Although the catalyst was completely deactivated after the ﬁrst 100–150 min of reaction, it could be recycled for (at least) ﬁve subsequent reactions without any loss of performance. The results provided incontrovertible evidence that for the investigated reaction, scCO2was a superior carrier with respect to conventional liquids, such as toluene or n-hexane.
|Data di pubblicazione:||2012|
|Titolo:||Continuous-Flow Alkene Metathesis: The Model Reaction of 1-Octene Catalyzed by Re2O7/alfa-Al2O3 with Supercritical CO2 as a Carrier|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1039/C2GC35983A|
|Appare nelle tipologie:||2.1 Articolo su rivista |