탄산마그네슘의 제조연구 II 탄산마그네슘의 전자현미경적 고찰

Studies on Synthesis of Magnesium Carbonate. II. Electronmicroscopic Shape of Magnesium Carbonate

Optium reactions for the preparation of extra-light magnesium carbonate form magnesium chloride and sodium carbonate solutions were found by observing the difference of crystalline shapes under an electronmicroscope. Reaction temperature and washing temperature were main factors affecting the crystalline shapes, and drying temperature was found to be of secondary imporrance. Optimum temperatures for reaction and washing ranged from 20o to 30oC and the temperature over 40ooC should by avoided for the reaction and washing. It was found that the higher the drying temperature, the lighter the crystal of the produced magnesium carbonate. Reaction time, molar ratio (Mg+2/CO2-3) and the concentrations of magnesium chloride and sodium carbonate solutions have only a slight effect on the form of the product.