Continuous preparation of alkaline hydrogen peroxide solution by micromixing device: Experiment and theoretical analysis

Abstract In the context of achieving continuous synthesis of acyl peroxides using microreactors, continuous preparation of alkaline hydrogen peroxide (AHP) solution is required. However, two key issues, Na 2 O 2 precipitation and H 2 O 2 decomposition, need to be considered or addressed. For the precipitation of Na 2 O 2 during NaOH and H 2 O 2 mixing, experiments revealed that precipitation could be avoided by appropriate selection of operation window. For the risk of violent H 2 O 2 decomposition when NaOH and H 2 O 2 solutions are one‐step mixed, theoretical approaches were adopted. Simulation‐derived mixing time is combined with decomposition kinetics to find a direct relationship between operation‐structure parameters and percentage of decomposed H 2 O 2 . This percentage is estimated to be in the order of 10 −4 for micromixing devices, which indicates that micromixing devices can be used to one‐step mix NaOH and H 2 O 2 solution without causing violent H 2 O 2 decomposition. This work provides insights into the preparation of AHP solution and facilitates its continuous preparation.