Lead tetroxide

Tetravalent lead is obtained when the metal is subjected to strong oxidizing action, such as in the electrolytic oxidation of lead anodes to lead dioxide, Pb02 when bivalent lead compounds are subjected to powerful oxidizing conditions, as in the calcination of lead monoxide to lead tetroxide, Pb O or by wet oxidation of bivalent lead ions to lead dioxide by chlorine water. The inorganic compounds of tetravalent lead are relatively unstable eg, in the presence of water they hydrolyze to give lead dioxide. [Pg.67]

Lead Tetroxide. Lead tetroxide (red lead minium lead orthoplumbite), Pb O, is a brilliant orange-red pigment which accounted for U.S. shipments of 17,780 t ia 1977, mainly to the ceramics and storage battery iadustries (40). U.S. shipments ia 1993 amounted to approximately 12,000 t. The decrease ia usage siace 1973 (19,000 t) is attributable to discontinued use ia the paint and coatings (qv) iadustry, and alterations ia mbber and ceramics (qv) markets. It is iasoluble ia water and alcohol, and dissolves ia acetic acid or hot hydrochloric acid. Red lead is manufactured by heating lead monoxide ia a reverberatory furnace ia the preseace of air at 450—500°C uatil the desired oxidative composition is obtaiaed. [Pg.69]

Lead has numerous applications as metal, alloys and compounds. The major applications of the metal and its alloys such as solder are as materials of construction for pipe lines, plumbing fixtures, wires, ammunition, containers for corrosive acids and shield against short-wavelength radiation. Another major application is in storage batteries in which both the metal and its dioxide are used. Several lead compounds, such as lead chromate (chrome yellow), lead sulfate (white lead), lead tetroxide (red lead), and the basic carbonate are used in paints. [Pg.454]

In very finely divided form, lead is pyrophoric. When heated in oxygen or air, the metal forms lead monoxide, PbO, which is oxidized further in the presence of excess oxygen or air to lead tetroxide, Pb304. The finely divided metal dissolves in a solution of sodium in hquid ammonia, forming a green solution of Na4Pbg. [Pg.456]

Insoluble powdered lead dioxide also may be obtained when lead tetroxide is heated with nitric acid ... [Pg.470]

When heated at 450-500°C in air or oxygen in a reverberatory furnace, lead monoxide is oxidized to lead tetroxide. However, other oxides or their mixtures having varying compositions may also form. The reaction is slow and gradual above 430°C. [Pg.474]

When heated with lead dioxide, at 250°C, the same product, lead tetroxide is obtained ... [Pg.474]

When heated above 450°, it decomposes to lead monoxide and lead tetroxide ... [Pg.476]

Lead tetraacetate is prepared by dissolving lead tetroxide in warm glacial acetic acid followed by cooling. On cooling, the tetraacetate crystallizes out while lead acetate remains in the solution ... [Pg.479]

Yield is improved by adding chlorine gas to the mixture. Alternatively, the compound may be prepared by adding a mixture of glacial acetic acid and acetic anhydride to lead tetroxide and heating the solution gently. Acetic anhydride converts the water formed in the reaction into acetic acid, thus preventing hydrolysis of the product lead tetraacetate. [Pg.480]

Lead tetroxide is made by heating lead monoxide in the presence of air at temperatures between 450 to 500°C. The temperature should be maintained below 500°C, above which the tetroxide decomposes. [Pg.484]

Lead tetroxide reacts with dilute nitric acid forming lead nitrate and precipitating lead dioxide ... [Pg.485]

The above reaction may be explained by assuming lead tetroxide as formally equivalent to plumbus plumbate having a structure Pb2 [Pbi 04] in which Pb2+ dissolves in dilute nitric acid forming lead(ll) nitrate whde Pb precipitates out as lead(lV) oxide. [Pg.485]

Lead tetroxide reacts with anhydrous acetic acid at 80°C producing lead(ll) acetate and lead(lV) acetate. Alternatively, the tetroxide is added into a mixture of glacial acetic acid and acetic anhydride and heated gently ... [Pg.485]

Lead tetroxide can be reduced to metallic lead when heated with reducing agents, such as hydrogen, carbon, or carbon monoxide ... [Pg.485]

Lead Oxide or Lead Tetroxide (Minium, Red Lead, Mineral Orange, Mineral Red, Plumbo, Puce, Orthoplumbate, Paris or Saturn Red). [Pg.567]

Oxides of Lead. — There are several oxides of lead the most important are lead monoxide, PbO, lead dioxide, Pb02, and lead tetroxide, PbgO. ... [Pg.310]

Oxides of lead. Give the preparation, properties, and uses of— (a) Lead monoxide. (c) Lead tetroxide. [Pg.311]

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