Further studies on the epoxidation of propylene in a bipolar trickle bed

Further studies on the epoxidation of propylene via electrogenerated hypobromite in a trickle bed have been carried out with the aim of increasing the space-time yield. Factors which have been studied in more detail include electrode material, applied voltage, sense of polarity, cell packing arrangements, electrolyte flow rate and sodium bromide concentration. By suitable choice of conditions a significant increase in space-time yield can be obtained, up to a limit set by the depletion of propylene, without a large increase in energy consumption.