METHOD FOR PREPARING CERIUM CARBONATE

摘要

PURPOSE: A method for manufacturing cerium carbonate is provided to improve the productivity of the cerium carbonate by reacting a cerium precursor and urea at raised temperature. CONSTITUTION: A method for manufacturing cerium carbonate includes the following: A reaction solution containing a cerium precursor and urea is continuously introduced into a supplying hole. The cerium precursor and the urea are reacted at raised temperature in a reaction tube. Cerium carbonate is formed and continuously discharged through a discharging hole. The residence time of the reaction solution satisfies formula, residence time(min) >= 20000·((concentration(mol/L) · diameter(inch))/temperature(°C)). The molar ratio of the cerium precursor and the urea is between 1:0.1 and 1:20.