A NEW HIGHLY EFFICIENT METHOD FOR THE SYNTHESIS OF TI-BETA ZEOLITE OXIDATION CATALYST

A new method for the efficient synthesis of zeolite Ti-Beta oxidation catalysts is reported. High yields of zeolite are obtained by carrying out the synthesis in a dense system, by crystallizing a mixture obtai ned by wetness impregnation of TiO2-SiO2 cogels. This method requires lower amounts of organic structure directing agent, and materials with low aluminium content can be synthesized. The crystallization mechani sm involves transport in the liquid phase, indicating that a direct tr ansformation of the cogel does not occur. Spectroscopic characterizati on techniques and catalytic tests demonstrate that Ti is incorporated into framework sites.