Trihydroxides

The term alumina hydrates or hydrated aluminas is used in industry and commerce to designate aluminum hydroxides. These compounds are tme hydroxides and do not contain water of hydration. Several forms are known a general classification is shown in Figure 1. The most weU-defined crystalline forms ate the trihydroxides, Al(OH) gibbsite [14762-49-3], bayerite [20257-20-9], and nordstrandite [13840-05-6], In addition, two aluminum oxide—hydroxides, AIO(OH), boelimite [1318-23-6] and diaspote [14457-84-2], have been clearly defined. The existence of several other forms of aluminum hydroxides have been claimed. However, there is controversy as to whether they ate truly new phases or stmctures having distorted lattices containing adsorbed or intedameUar water and impurities. [Pg.167]

Bayerite (P-Aluminum Trihydroxide). Bayerite is rarely found in nature. It has been synthesized by several methods A pure product is prepared by the Schm b method (3) in wliich amalgamated aluminum reacts with water at room temperature. Other methods include rapid precipitation from sodium alurninate solution by CO2 gassing, aging of gels produced by neutrali2ation of aluminum salts with NH OH, and rehydration of transition rlio alumina. [Pg.169]

Low, G.C., 1975. Agglomeration effects in aluminium trihydroxide precipitation. Ph.D. Dissertation, University of Queensland, Australia. [Pg.314]

Misra, C. and White, E.T., 1971. Kinetics of aluminium trihydroxide from seeded caustic aluminate solutions. American Institute of Chemical Engineers Symposium Series, 67(110), 53-65. [Pg.315]

Chromium(lll) oxide, 402 Chromium trihydroxide, 396, 402 Cis-trans isomerism, 296, 394... [Pg.457]

Alumina - Alumina forms a variety of oxides and hydroxides whose structures have been characterized by X-ray diffraction (16). From the catalytic viewpoint y-alumina is the most important. This is a metastable phase that is produced from successive dehydration of aluminum trihydroxide (gibbsite) to aluminum oxide hydroxide (boehmite) to y-alumina, or from dehydration of boehmite formed hydrothermally. y-alumina is converted into a-alumina (corundum) at temperatures around 1000 C. [Pg.455]

Aluminium borohydride Aluminium chloride Aluminium chlorate Ammonium tetrachloroaluminate Aluminium fluoride Aluminium trihydroxide Aluminium ammonium sulphate Aluminium potassium sulphate Aluminium nitride Aluminium nitrate Sodium aluminate Aluminium sodium aluminate Aluminium phosphate Aluminium phosphide Aluminium borate Aluminium oxychloride Aluminium fluorosilicate Aluminium magnesium silicate Aluminium sulphate... [Pg.459]

Aluminum trifluoride trihydrate, 2 361 a-Aluminum trihydroxide. See Gibbsite P-Aluminum trihydroxide. See Bayerite Aluminum trihydroxides, 2 421 classification, 2 422... [Pg.43]

P-aluminum trihydroxide. See Bayerite P-amino alcohols, 2 113 P-amylases, 10 288... [Pg.96]

Preparation. Industrially, cobalt is normally produced as a by-product from the production of copper, nickel and lead. The ore is roasted to form a mixture of metals and metal oxides. Treatment with sulphuric acid leaves metallic copper as a residue and dissolves out iron, cobalt and nickel as the sulphates. Iron is separated by precipitation with lime (CaO) while cobalt is produced as the hydroxide by precipitation with sodium hypochlorite. The trihydroxide Co(OH)3 is heated to form the oxide and then reduced with carbon (as charcoal) to form cobalt metal. [Pg.430]

The aim was to assess the feasibility of substitution with less hazardous flame retardants. They selected red phosphorus, ammonium polyphosphate and aluminium trihydroxide as the least environmentally problematic alternatives. Red phosphorus can technically be used in a variety of polymers to meet even the toughest fire safety standards, although it may network forall applications. ... [Pg.21]

Zachariasen reported 179) that the trihydroxides of La, Pr, and Nd are isostructural with UCI3 (C63/OT) and contain nonacoordinated lanthanide ions. Schubert and Seitz 187) found that the trihydroxides of La, Pr, Nd, Sm, Gd, Dy and Er are isostructural with Y(OH)3 which also belongs to the space group... [Pg.123]

Assessment of the toxicity of aluminas has been complicated by the chemical and physical variants of the compounds and inconsistencies in the nomenclature used to describe them. The group of compounds referred to as aluminas is composed of various structural forms of aluminum oxide, trihydroxide, and oxyhydrox-ide. As these aluminas are heated, dehydration occurs, producing a variety of transitional forms temperatures between 200 and 500°C result in low-temperature-range transitional... [Pg.38]

Silca, crystalline-quartz, 628 Chromyl chloride, 175 Fthylidene norbornene, 335 Methomyl, 443 Cobalt hydrocarbonyl, 182 Decaborane, 203 Benomyl, 67 Diborane, 211 Pentaborane, 555 Osmium tetroxide, 546 Cesium hydroxide, 131 Alumina trihydroxide, 38 Aluminum oxyhydroxide, 38 Vinyl toluene, 738 Nonylphenol, 541 2,4-Dinitrotoluene, 279 Trimethyl benzene, 712 Methylcyclohexanol, 465 Terphenyls, 656 Isooctyl alcohol, 409 Anisidine, 52... [Pg.760]

Formula Au(OH)3 MW 247.99 Synonyms gold trihydroxide auric hydroxide. [Pg.327]

Glycerin(e). Same as Glycerol or Glyceryl Trihydroxide. Not to be confused with glyceryl or propenyl, which.is trivalent radical, —H2C.CH.CH2—i -derived from glycerol... [Pg.729]

Cu2(0H)3(N03) Dicopper trihydroxide nitrate Dicopper(II) trihydroxide nitrate... [Pg.111]

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