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Peroxides calcium

The rate of dissolution is limited by oxygen availabiUty rather than by cyanide concentration. When oxygen solubiUty is reduced by water salinity or by consumption by ore constituents such as sulfide minerals, enrichment of the air with oxygen or addition of hydrogen or calcium peroxide improves leaching kinetics and decreases cyanide consumption (10). [Pg.378]

Other Reactions. Dry hydrated lime adsorbs halogen gases, eg, CI2 and F2, to form hypochlorites and fluorides. It reacts with hydrogen peroxide to form calcium peroxide, a rather unstable compound. At sintering temperatures, quicklime combines with iron to form dicalcium ferrite. [Pg.168]

Calcium Peroxide. Pure calcium peroxide [1305-79-9] Ca02, has been prepared, but the commercial product is a mixture made by reaction of calcium hydroxide and hydrogen peroxide. Commercial material contains either 60 or 75% Ca02 the remainder is a poorly defined mixture of calcium oxide, hydroxide, and carbonate. A well-defined octahydrate [60762-59-6] 8H20, can be crysta11i2ed from aqueous systems. [Pg.91]

PermeOx is also used to improve the bioremediation of soils contaminated with creosote or kerosene (see Bioremediation (Supplement)), to deodori2e sewage sludges and wastewater (see Odormodification), and to dechloriaate wastewater and effluents. A special formulation of calcium peroxide, made by FMC and sold ia the United States under the trademark Trap2ene, is used for removing metal ions from acidic waste streams such as coal ash leachate and acid mine drainage (see Wastes, industrial). [Pg.91]

Calcium peroxide is made by EMC, L Air Liquide, Nippon Peroxide (Japan), Shimakyo Chemical (Japan), Solvay Deutschland, Solvay Interox (United Kingdom), and Tomita Seiyaku (Japan). Trade names used for calcium peroxide are Calper, IXPER 60 C, IXPER 75 C, PermeOx, and Trap2ene. The world market for calcium peroxide ia 1992 was about 2000 t. The U.S. prices ia 1994 were, for the food-grade (75% Ca02), 3.97/kg and for the technical grade (60%), 2.97—3.30/kg. [Pg.91]

Of the binary peroxides made from hydrogen peroxide, calcium peroxide is the most important. World production is about 2000 t/yr, which is dominated by the dough-conditioning market in the United States. The markets for the other binary peroxides, such as those of zinc, magnesium, and strontium, total only a few hundred metric tons. Sodium peroxide and potassium superoxide are made from the alkaU metals and thek total markets are in the hundreds of tons. [Pg.99]

Vulcanisation may also be brought about by zinc and calcium peroxides, p-quinone dioxime, epoxide resins, phenolic resins and di-isocyanates. [Pg.553]

A fire is reported subsequent to industrial mixing of calcium peroxide and a chlorinated paraffin. Even completely chlorinated hydrocarbons can be oxidised, to phosgene. [Pg.1327]

AuPLUS A hydrometallurgical process for extracting gold. Addition of calcium peroxide to the cyanide leaching liquor increases the rate and amount of gold extracted. [Pg.29]

Calcium peroxide, 18 395-396 applications of, 18 395, 396 from hydrogen peroxide, 14 67 Calcium phosphate(s), 11 120 18 836-839 accelerator for dental cements, 8 285, 341-342... [Pg.134]

Calcium chlorate Calcium chlorite Calcium hypochlorite Calcium perchlorate Calcium permanganate Calcium peroxide Chloric acid (10 percent maximum concentration) Chlorine... [Pg.64]

Barium peroxide, 0216 Calcium peroxide, 3938 Mercury peroxide, 4606... [Pg.252]

Calcium hypochlorite, 3924 Calcium nitrate, 3935 Calcium permanganate, 3934 Calcium peroxide, 3938 Calcium peroxodisulfate, 3940 Calcium triperoxochromate, 3945 Chlorine, 4047... [Pg.307]

Whereas the fungicides carbendazim and drazoxolon were effective in controlling the disease, calcium peroxide was also effective (26). This compound had the added advantage of releasing alkali to... [Pg.50]

See other pages where Peroxides calcium is mentioned: [Pg.76]    [Pg.1157]    [Pg.127]    [Pg.154]    [Pg.154]    [Pg.450]    [Pg.996]    [Pg.1063]    [Pg.357]    [Pg.441]    [Pg.91]    [Pg.91]    [Pg.91]    [Pg.91]    [Pg.91]    [Pg.456]    [Pg.171]    [Pg.503]    [Pg.206]    [Pg.77]    [Pg.132]    [Pg.34]    [Pg.81]    [Pg.325]    [Pg.337]    [Pg.667]    [Pg.326]    [Pg.326]    [Pg.1327]    [Pg.1426]    [Pg.134]    [Pg.476]    [Pg.398]    [Pg.62]   
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Calcium peroxide hydrate

Calcium peroxide, decomposition

Hydrogen peroxide-calcium chloride

IXPER®, calcium peroxide

Peroxide, barium calcium

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