喷煤催化助燃剂中二氧化锰的分析  

Analysis of MnO2 in Catalysis Combustion-supporting Agent for PCI

作　　者：张平建 王德全 李凌云 

机构地区：[1]品质保证部

出　　处：《莱钢科技》2009年第4期71-72,共2页Laigang Science & Technology

摘　　要：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。The oxidation-reduction titrimetric method for manganese is based on the fact that manganese, a valence-change element, is made to produce valence state change by making use of a certain oxidant and reducing agent, thus to obtain the content of MnO2. After the sample was dissolved with hydrochloric acid, hydrofluoric acid and phosphoric acid, in the presence of a great deal of phosphoric acid, perchloric acid was used to oxidize bivalent manganese into trivalent manganese at about220℃. With N-phenylated anthranilate as the indicator, ammonium ferrous sulfate standard solution was used to titrate trivalent manganese, by which to determine the content of MnO2.

关 键 词：喷煤 催化助燃剂 盐酸 磷酸 滴定法 

分 类 号：TF046.4[冶金工程—冶金物理化学] TQ137.12[化学工程—无机化工]