Synthesis of Targeted Catalyst for the Oxidative Dehydration of Sec-Butanol and Study of the Kinetics and Mechanism of the Process

Abstract

The catalytic activity of CaA zeolite modified with metal cations (Cu, Zn, Pd) by means of ion exchange in the reaction of partial oxidation of sec-butanol to methyl ethyl ketone was studied at atmospheric pressure in the temperature range of 240-3500 C, space velocities 1500-4000 h-1 and partial pressures of butanol-2 PB−2 = 0.12-0.36 atm, oxygen O2 P = 0.12-0.24 atm. It found that the metal zeolite catalyst CuZnPdCaA containing 3.0 wt% Cu2+ , 2.0 wt% Zn2+ and 0.1 wt% Pd2+ exhibited the highest activity and selectivity in the reaction under consideration. Also, kinetic regularities of the reaction on the indicated catalyst were studied. On the basis of experimental data, a probable stepwise mechanism of the reaction was proposed and a theoretically substantiated kinetic model of the process developed.