Synthesis and Characterization of TS-1 with Aid of Supercritical CO2

A new route to synthesize TS-1 has been developed using the supercritical carbon dioxide（SCCO2） as a crystallization-assistant agent. SCCO2 plays a dual role： as a reagent changing the alkalinity during the crystallization process and as a medium eliminating mass-transfer limitations（both within the bulk fluid and through liquid/gas, solid/gas or solid/liquid phase boundaries）. In this route, it was shown that the Ti content in TS-I increase compared with that in the TS-1 prepared without SCCO2, but decrease while the SCCO2 pressure increase. The prepared crystal morphology also underwent significant change. The crystallization time of TS-1 can be shorten a lot.