Chemoselectivity and Rate of Hydroformylation Reaction of 1-Dodecene by Rhodium Complex of 2-Naphthyl Monodentate Bulky Phosphite Ligand Catalyst

Abstract

In this research, a new phosphite ligand (tri-2-naphthylphosphite (L)) was synthesized using standard Schlenk technique under N2 atmosphere. Then an RhH(CO)3L complex was formed with this ligand in during the hydroformylation reaction. Initial rate and selectivity (linear aldehyde/branch aldehyde [l/b] ratio) of rhodium complex catalyst was studied for hydroformylation of 1-dodecene at temperature of 60–90°C, a pressure of 2–6 MP with different H2/CO ratio, and various initial concentrations of 1-dodecene. Effect of ligand/metal ratio (L/Rh) and catalyst initial concentration was studied in selectivity and rate of hydroformylation reaction. The maximum amount of (l/b) with the most appropriate reaction rate was obtained in temperature = 70°C, Pressure = 3MP (with H2/CO = 1.5/1.5), initial 1-dodecene concentration = 1.56 mol/L, (L/Rh) = 6. The results show that the reaction rate for production of linear aldehyde increases when the concentration of catalyst was increased.