Direct O2 Epoxidation of Propylene by the Membrane Reactor Loaded with Ag–Sr Catalyst

A novel membrane reactor process using porous α-Al 2 O 3 tube loaded with silver-strontium catalyst realized direct O 2 epoxidation of propylene with notable selectivity of propylene oxide. Segregated feed of propylene and O 2 combined with facile permeation of reactants and products across the membrane was essentially important for the membrane epoxidation process.