Potassium peroxides

The relevant properties of peroxide and superoxide salts are given in Table 4 (see Peroxides and peroxide compounds, inorganic). Potassium peroxide is difficult to prepare and lithium superoxide is very unstable. The ozonides, MO3, of the alkah metals contain a very high percentage of oxygen, but are only stable below room temperature (see Ozone). 

Uses. Potassium peroxide is used as an oxidizing agent and in oxygen generating units for gas masks (Ref 5). Another use has been found by Hatterer who developed a device which extracts the thermal energy from nuclear reactors in a reaction which generates H2 and 02 gases by... 

Accidents with violent detonations were reported, which involved sodium or potassium peroxides with metal as well as hydrogen peroxide. 

Red phosphorus reacts vigorously on heating with copper oxide or manganese dioxide and on grinding with lead oxide, mercury oxide or silver oxide, ignition may occur. Red phosphorus ignites in contact with lead peroxide, potassium peroxide or sodium peroxide, while white phosphorus explodes, and also in contact with molten chromium trioxide at 200°C. 

Metal oxides MRH Chromium trioxide 2.51/50, potassium peroxide 1.72/45... 

Several different oxidants have been used in this work. The trend has been to stronger oxidants, in the hope that more complete oxidation would result. Among those used have been potassium peroxide [69], dichromate in sulfuric acid [70-73], silver-catalysed potassium dichromate [74,75], potassium per-... 

Nitrites, inorganic Nitrogen oxides (NOx) Oxygen Peracetic acid Perchloric acid solutions Potassium bromate Potassium chlorate Potassium dichloro-s-triazinetrione (potassium dichloroisocyanurate) Potassium dichromate Potassium percarbonate Potassium perchlorate Potassium permanganate Potassium peroxide Potassium persulfate Potassium superoxide n-Propyl nitrate... 

Valentine and Curtis (1975) extended the synthetic utility of potassium peroxide by reporting the successful solubilization of K02 in dry dimethyl sulfoxide using dicyclohexyl- 18-crown-6 ([20] + [21]). Corey et al. (1975) used 18-crown-6 to solubilize KOz in dimethylformamide, dimethoxyethane and diethyl ether, whilst Johnson and Nidy (1975) reported its solubilization in benzene. A wide variety of chemical transformations have been realized with K02 complexes of crown ethers. With alkyl halides the main reaction products are peroxides, alcohols and olefins (Johnson and Nidy, 1975). Peroxides are... 

Potassium reacts with oxygen or air forming three oxides potassium monoxide, KaO potassium peroxide, KaOa and potassium superoxide, KOa. The nature of the product depends on oxygen supply. In limited supply of oxygen potassium monoxide is formed, while in excess oxygen, superoxide is... 

The effect of the concentration of base requires that the formation of superoxide from peroxide is more rapid and occurs to a greater extent at the higher base concentrations. This conclusion is difficult to test, because both potassium peroxide and potassium superoxide are insoluble in the oxidation solvent and potassium superoxide precipitates from solution with as much as 35% by weight of potassium terf-butoxide or potassium hydroxide (which can be removed by extraction with tert-butyl... 

Figure 4. Oxidation of 2.5 mmoles of potassium peroxide in 25 ml. of dimethyl sulfoxide (80% )-tert-butyl alcohol (20%)...

Oxidation of Potassium Peroxide. Determination of Potassium Superoxide. Potassium peroxide was prepared by the addition of a tert-butyl alcohol solution of 90% hydrogen peroxide to potassium tert-butoxide in DMSO or tert-butyl alcohol. Oxygen absorption was followed in the standard manner (20). Analysis of solid precipitates for potassium superoxide followed exactly the method of Seyb and Kleinberg (23). Potassium superoxide formed in the oxidation of benzhydrol was determined in a 15-ml. aliquot of the oxidation solution. To this aliquot 10 ml. of diethyl phthlate was added to prevent freezing of the solution. The mixture was cooled to 0°C., and 10 ml. of acetic acid-diethyl phthlate (4 to 1) added over a period of 30 minutes with stirring. The volume of the evolved oxygen was measured. 

POTASSIUM PEROXIDE Potassium superoxide Oxidizing Material, Solid, 1 3 0 2 W... 

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