Ammonium carbonate persulphate

H. Stamm also measured the solubilities of the salts of the alkalies in liquid ammonia —potassium hydroxide, nitrate, sulphate, chromate, oxalate, perchlorate, persulphate, chloride, bromide, iodide, carbonate, and chlorate rubidium chloride, bromide, and sulphate esesium chloride, iodide, carbonate, and sulphate lithium chloride and sulphate sodium phosphate, phosphite, hypophosphite, fluoride, chloride, iodide, bromate, perchlorate, periodate, hyponitrire, nitrite, nitrate, azide, dithionate, chromate, carbonate, oxalate, benzoate, phtnalate, isophthalate ammonium, chloride, chlorate, bromide, iodide, perchlorate, sulphate, sulphite, chromate, molybdate, nitrate, dithionate, thiosulphate, persulphate, thiocyanate, phosphate, phosphite, hypophosphite, arsenate, arsenite, amidosulphonate, ferrocyanide, carbonate, benzoate, methionate, phenylacetate, picrate, salicylate, phenylpropionate, benzoldisulphonate, benzolsulphonate, phthalate, trimesmate, mellitate, aliphatic dicarboxylates, tartrate, fumarate, and maleinate and phenol. 

Smouldering 60 g of a 4 1 mixture of ammonium persulphate and sawdust smoulders while carbonization spreads gradually as a black front with smoke after flame has disappeared. 

Sodium persulphate, Na2S208.—The persulphate is formed in solution by the electrolysis of a concentrated aqueous solution of sodium sulphate at low temperature and high current-density. The solid persulphate can be obtained by double decomposition of ammonium persulphate and sodium carbonate either in the solid state or in concentrated solution, the crystalline salt being isolated from the solution either by addition of alcohol or by concentration at reduced pressure.15 When dry and protected from sunlight, it keeps almost unchanged for years.16... 

Mention must also be made of certain peroxy compounds, some of which have attained considerable technical importance in comparatively recent times. Sodium peroxide is obtained by the action of hot air on sodium contained in aluminium trays. The per-carbonates and persulphates of sodium, potassium, and ammonium are prepared by methods of electrolysis. Barium peroxide is made by heating the oxide to a dull redness in dry air, free from carbon-dioxide, and is used in the manufacture of hydrogen peroxide, which, as are other peroxy compounds, is largely applied as a bleaching agent for cellulose materials. 

While it is possible to bond to a freshly abraded or cleaned metal surface, chemical treatments are preferred for rendering the metal surface inactive to corrosion over time. For low carbon steel, phosphatising is the recommended pre-bond surface preparation treatment. Stainless steel should be passivated or acid etched, while titanium is usually treated with a hydrofluoric acid pickle. Almninium or magnesium are best treated with a chromate conversion coating. Zinc and cadmium are generally prepared mechanically but a phosphate or chromic acid treatment may be used. Brass and copper may be treated with an ammonium persulphate etch or an acid-ferric chloride etch. 

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