Zeolites based on silica and oxides of tetravalent elements, method for their synthesis and their use.

摘要

Zeolites based on silica and oxides of tetravalent elements chosen from tin and zirconium. The subject of the invention is a zeolite based on silica and an oxide of a tetravalent element, characterised in that it has the following general formula (I) after calcination: (Si91-xT'x)O192 (I> in which formula (I): - X is between 0.1 and 5.0, - T' symbolises a tetravelent element chosen from the group consisting of tin and zirconium. These zeolites have a structure of MFI type and can be employed especially in the field of catalysis and, more particularly, in a process for hydroxylation of phenols or phenol ethers with hydrogen peroxide.