In this study, we successfully synthesized Zn-Sn and Al-Sn catalysts by the combination of co-precipitation and hydrothermal methods. These catalysts were prepared by hydrothermal method using ZnCl2, SnCl4 and AlCl3 precursors. Structure and physical properties of catalysts were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The products of glycerol conversion product was also tested by gas chromatography. | Synthesis of solid acid-base catalysts based on Zn-Sn and Al-Sn used for carbonylation of glycerol with urea into glycerol carbonate