Recently, one of the most important material which uses in the catalytic reactions are Ionic liquids. The ionic liquid plays the dual role of solvent and acid catalyst. Also, a large volume of studies has been published describing the role of heterogeneous catalysis in organic reaction. Zeolite is a special type of ordered microporous support with unique and significant properties which development preparation of cleaner and efficient catalyst.[1-4] In this work HY by zeolite functionalized by ionic liquid [TMSiPST] and characterized with different methods such as FT-IR, XRD, SEM-EDX.The FT-IR spectrum of Ionic liquid which introduced to/HY zeolite show an intense band about ca. 1009 cm-1 attribute to the asymmetric stretching of Al–O–Si chain of zeolite. The symmetric stretching and bending bands of Al–O–Si framework of zeolite appear at ca.435 and 778 cm-1, respectively. We have seen the FESEM micrographs of Ionic liquid /HY zeolite hybrid with a wide range of sizes. It indicates the presence of well-defined HY zeolite crystals with some shadow of modification presence on its external surface. The particle sizes are around 160 nm and this decrease of size for modified zeolite is due to the complex formation on the support.
