Abstract：NaCIO 3 is produced when MnCl 2·4H 2O reacts with (NH 4) 2CO 3 under given conditions (by controlling reactions temperature and acidity and so on) and dissolved by the concentrated HNO 3,Mn 2+ is oxidized by NaClO 3 under a certain conditions.The MnO 2 s
1999, Vol. 23 