Abstract: Manganese oxide octahedral molecular sieves（OMS-2） nanorods were prepared in high gravity reactor by redox precipitation method.Growth mechanism of OMS-2 nanorods was proposed according to morphology evolution observed by characterization techniques.Performance of OMS-2 nanorods as catalyst support in preparation process of oxidative carbonylation was studied.Characterization results showed that the crystal growth process accorded with the mechanism of ‘nucleation，dissolution，anisotropic growth，and recrystallization’.OMS-2 nanorods obtained in high gravity reactor were used as catalyst supports and applied in oxidative carbonylation of phenol.Active results showed that OMS-2 supports prepared by potassium permanganate and sucrose as reducing agents showed the better catalytic and oxidative activities，and DPC yield reached 9.2%.

Key words: manganese oxides, nanorod, high-gravity, growth mechanism, oxidative carbonylation