Deactivation and regeneration of the supported bimetallic Pd-Pb catalyst in direct oxidative esterification of methacrolein with methanol

- Deactivation of Pd-Pb catalyst in the repeated batch reactions was investigated.
- Deactivation is associated with deposition of organic substances on catalyst.
- Washing the deactivated catalyst with MeOH could completely recover the activity.
- There was no distinct deactivation of the activity in continuous-flow reaction.