<![CDATA[Abstract. This research utilized dolomite rock (CaMg(CO2)2) to produce CaO-MgO material using precipitation-dehydration. The precipitation-dehydration method was carried out by dissolving dolomite in 10% hydrochloric acid (HCl) solvent and precipitating in 2 N sodium hydroxide (NaOH) solution at a temperature of 80 oC. The resulting products were analyzed using Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX) and Brunauer-Emmett-Teller (BET). The acidity level of the solution was analyzed by using a pH meter. The analysis results using SEM-EDX show that the material has a characteristic chemical composition with a Ca/Mg ratio less than 1. The results of BET show that the average surface area, average pore volume, average pore size and average particle diameter are 71.1213 m2/g, 0.1081 cc/g, 20.5165 nm, and 36 nm, respectively. The solution's acidity (pH level) in precipitation-dehydration is 8-8.5. It is identified that precipitation-dehydration can be used for CaO-MgO recovery and further application in catalyst materials.Keywords:Dolomite rock, Calcium oxide, Magnesium oxide, Precipitation-dehydration]]>
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