高炉喷煤催化助燃剂中二氧化锰的分析

Analysis of manganese dioxide in BF PCI catalytic combustion

锰的氧化还原滴定法是基于锰是一种变价元素,利用一定的氧化剂还原剂促使锰发生价态变化,从而求得二氧化锰量。试样以盐酸、氢氟酸、磷酸溶解后,在大量磷酸存在下,用高氯酸于220℃左右时将二价锰氧化为三价锰。以 N-苯代邻氨基苯甲酸为指示剂,用硫酸亚铁铵标准溶液滴定三价锰,借此测定二氧化锰含量。

Manganese redox titration is based on that manganese is variable element, the use of certain oxidant reductant to manganese in valence changes, which seek manganese dioxide volume. Sample is dissolved in hydrochloric acid, hydrofluoric acid and phosphoric acid, with 220 ℃ , manganese oxide became trivalent manganese. N-o-aminobenzoie acid and benzene for the indicator, used ferrous ammonium sulfate to titrate trivalent manganese standard solution, and determined content of manganese dioxide.