水酸化アルミニウムに対するマンガンの共沈澱について

概要

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The amount of manganese co-precipitated with aluminium hydroxide is estimated and a method of preventing the co-precipitation is studied.The amount of co-precipitation of manganese with aluminium hydroxide increases with an increase of the amount of manganese added.When the amount of addition exceeds above 2mg per 100mg Al2O3, the amount of manganese included or adsorbed in aluminium hydroxide reaches a maximum value, after which the amount of precipitation of manganese increases. Within the range of about 0.5mg Mn/100mg Al2O3, aluminium hydroxide precipitated at a higher temperature is filtered and washed easily, but the amount of manganese co-precipitated with aluminium becomes 1.7 times more than that precipitated at room temperature. However, the amount of co-precipitated manganese can be decreased down to 2% of manganese added by applying the freezing and washing process previously reported.Furthermore, application of freezing method on iron, aluminium and manganese mixture is expected to give an accurate estimation of iron and aluminium.
社団法人日本分析化学会の論文