Badau Belitung kaolin was used as a raw material for the synthesis of zeolites for petroleum treating catalysts support to modify the structure of heavy hydrocarbon compounds into middle distillates. In the work, kaolin was converted into metakaolin before being synthesized to zeolite in order to increase its reactivity. Kaolin from Badau Belitung was firstly activated using NH4NO3 2 M solution, agitated for 24 hours with 700 rpm at temperature of 55 °C, neutralized and dried at temperature of 110 °C, sieved at 100 mesh. The samples were heated at three different temperatures of 300 °C, 500 °C, 700 °C for two different calcination time of 3 and 5 hours. Further, the physical properties were studied. The samples were characterized using Braun Emmet Teller (BET), Fourier transform infrared (FTIR) Spectroscopy and X-Ray Diffraction Spectroscopy (XRD). The results showed an increase in pore diameter as the temperature and duration of calcination increase. The optimum pore diameter of 3.41 nm was obtained at calcination temperatures of 700 °C, as also supported by the results of FTIR and XRD that showed kaolin dehydroxylation, phase and structural changes.