Isolation Mg(OH)2 from Dolomite with Extraction Process used HNO3

Dolomite MgCa(CO3)2 has not been used to the fullest in Indonesia, where the natural resources of dolomites are quite abundant and are available in very large quantities. Mg(OH)2 isolated of dolomite originated from the East Java region with the extraction process using nitric acid. Using variable time and temperature, to acquire the element Mg(OH)2. To get the greatest Mg(OH)2, the precipitation process from using NaOH, and isolating Mg(OH)2 from the Elements of Ca(OH)2 and other impurities with Na EDTA solutions. From research obtained the best condition Mg(OH)2 from dolomite with NaOH additions with a variable stirring time for 5 hours and a temperature of 45 °C is at 175.60 mg/L.