Permanganate, and manganese dioxide

Silver permanganate and potassium permanganate on silica gel, or mixtures of silver oxide and manganese dioxide on the same support, show good activity in the absence of oil and water vapor (15), and a mixture of silver permanganate and manganese dioxide was rather active in the presence of water vapor (15). 

Agunwa, U. B. Okonkwo, E. M. Production of malachite green by oxidation of its leuco base using potassium persulphate, potassium permanganate and manganese dioxide. Global J. Pure Appl. Sci. 2004,10, 143-146. 

Treatment of the diluted solution with 10 mL of 30% hydrogen peroxide (H2O2) to reduce the residual permanganate and manganese dioxide. 

In presence of semiconductor powders, suspended in permanganate solution, uv irradiation was found to lead to reduction by electrons promoted to the conduction band of the catalyst. Presumably reduction produces manganate (VI). This however disproportionates to permanganate and manganese dioxide. 

Nitric oxide is oxidized to nitrate ion by permanganate ion. In acid medium, the products are nitric acid and manganese dioxide ... 

The oxide is capable also of effecting certain reductions, hydrogen peroxide being reduced to water, and acidulated potassium permanganate to manganese dioxide, platinum dioxide being simultaneously formed. 

The Manganates and Permanganates. When manganese dioxide is heated with potassium hydroxide in the presence of air it is oxidized to potassium manganate, K MnO ... 

Write the ei emical equations for the preparation of potassium manganate and potassium permanganate from manganese dioxide, using potassium hydroxide, air, and carbon dioxide. 

Mix thoroughly (do not grind) approxlmatcty equal vdumsa of pow dered charcoal, ammonium chloride and oQe of the followinf potaaaium permanganate or manganese dioxide. Add water until a very thick paate it formed. If ammonium chloride is in solution form it msy not be necessary to add water. 

Potassium permanganate can be made from potassium hydroxide and manganese dioxide ore using an electrolytic process, as described in U.S. 5,660,712 (unassigned, but clearly owned by Carus Corp.). Estimate the cost of manufacturing potassium permanganate. 

Some other metal salts and other reagents which have been used to oxidize tertiary amines to enamines include palladiumfll) chloride copper(II) chloride , copperfi) chloride with oxygen , iodine, iodine pentafluoride , chlorine dioxide S permanganate ion , manganese dioxide , AT-bromosuccinimide , benzoyl peroxide , quinones and azodiformate . ... 

Nanocrystalline manganese(III) oxide MnjOj and manganese dioxide MnOj powders were prepared from potassium permanganate (KMn04) aqueous solutions by use of y-ray radiation in the presence of surfactants PVA or sodium dodecyl sulfate (SDS) and radical scavenger propan-2-ol (Liu et al. 1996,1997). 1 mol dm- sodium hydroxide was used for pH adjustment. Various ratios of individual compounds determine the stoichiometry of prepared materials. 

---