Regeneration of coked cumene synthesis catalyst using steam-containing mixture

Properties of the coke formed on M-92 cumene synthesis catalyst and regeneration of the catalyst using H_2O-O_2-N_2 were investigated.The activity,acidity,surface area and crystallinity of the regenerated catalysts were tested.The results showed that the coke formed on M-92 catalyst consisted of low-temperature coke and high-temperature coke.Both regeneration temperature and regeneration time had remarkable influence on the activity.Regeneration temperature should be controlled below 450 ℃.Activity of the deactivated catalyst can be restored by regeneration under appropriate regeneration conditions,with better stability than fresh catalyst.