Abstract: Heteroatom-containing zeolites or metallosilicates have been widely used in the environment-friendly selective oxidation processes for producing oxygen-containing chemicals and fine chemicals, which is changing the backwardness of conventional oxidation processes. However, the conventional metallosilicates usually possess only small-sized pore channels, which induce severe diffusion constrains. Moreover, the traditional hydrothermal synthesis processes of metallosilicates are complicated and time-consuming. To address these problems, a series of novel metallosilicates with larger pores have been developed to release the diffusion constrains, and several new synthesis routes have been proposed to shorten the synthesis duration and to increase the content of heteroatom active sites as well. Last but not the least, we have also been working on the chemical modification of the micro-environment of heteroatom active sites as well as the exploration of novel catalytic oxidation reaction processes, which is expectable to provide practically usable technologies for the development of selective oxidation processes.

Key words: heteroatom-containing zeolite, titanosilicate, stannosilicate, selective oxidation, environment-friendly catalysis