: Zeolites are microporous crystalline alumino-silicates with cage-like structures that have pores of uniform shape. The pore size of zeolites is of dimensions in the range of (2-13 ?) which is close to the molecular sizes of most of the chemical compounds. a , 4A zeolite was subjected to ion exchange by tin chloride and Sn-A zeolite was synthesized and characterized. X-ray fluorescence (XRF) were used to identify / ratio in kaolin and Powder X-ray diffraction (XRD), Scanning Electron Microscopy(SEM), Energy-dispersive X-ray spectroscopy (EDX), were used to confirm zeolite crystallinity, phase purity, and morphology. Then the best sample were subject to adsorption tests using a special cut of kerosene composed of araffinic hydrocarbons and adsorption and sieving properties of the zeolite were studies by Gas Chromatography (GC). Results show that the microemulsion induces rapid growth, as 4A zeolite formation begins within 2 h of the synthesis, compared to 12 h for the samples that were not prepared by the microemulsion technique. Also, the results show that ultrasound play a great role in reducing the crystal size. Microemulsion-ultrasound method produces smaller, more uniform, and purer zeolite nanocrystals with larger pore size and greater ion exchange capacity than the conventional synthesis methods. Key words: 5A zeolite, surfactant, microemulsion, ultrasound, ion exchange
