The Reactions of Salts of Manganese Oxoacids with Oxides of Nitrogen

Abstract

Absorption reactions of nitrogen oxides(NO3) in potassium manganate or permanganate solution and of nitric oxide on potassium permanganate crystal at 300-600C were studied. The Reactions in alkaline permanganate solution are
KMnO4+NO+2KOH=KNO2+K2MnO4+H2Q (1)
KMnO4+NO2+2KOH=KNO3+K2MnO4+H20 (2)
and following reactiens take place in a larger mole ratio of NOx/KMnO4 (1)
K2MnOA+2 NO =2 KNQ2+MnO2 (3)
K2MnO+2NO2+2KNO3+MnO2 (4)
These reactions also occur in a potassium manganate solution. The oxidation of nitrite with permanganate occurred immediately after the absorption if amount of KOH was insufcient.
2KMnOi+KNO3+2KOH=KNOs+2K2MnO+HaO (5)
2KMnOd+3KNO2+H20=3KNOs+2MnO2+2KOH (6)
In a neutral solution the oxidations proceed qpickly. The absorption reaction is expressed as follow,
KMnO4+NO=KNOg+MnO2 (7)
KMnO4+3NO2+H20=KNOg+2HNQ3+MnO2 (8)
Nitrogen, oxide was absorbed well in K2MnO crystal or a mixture of MnO2, and KOH at 300N600eC. A mixture of K2MnOd and KOH absorbed. at lower temperatures, and had the larger ability. t, o qbsbrb NQ per one mol. e K3MnOl, tha, n, K2MpOd alone did.