Aluminic acid

The precipitate is aluminic acid, displaced from its salt by the stronger acid, Na3A103 + 3HN03 —> H3AIO3 + 3NaN03. That the aluminic acid dissolves in nitric acid indicates that it reacts to form a soluble salt and is itself reacting as a base. 

SYNS AF 260 ALCOA 331 ALUMIGEL ALUMINA HYDRATE ALUMINA HYDRATED ALUMINA TRIHYDRATE a-ALUMINA TRIHYDRATE ALUMINIC ACID ALUMINLLM HYDRATE ALUMINUM(III) HYDROXIDE ALUMINUM HYDROXIDE GEL ALUMINUM OXIDE HYDRATE ALUMINUM OXIDE TRIHYDRATE ALUMINUM TRIHYDRAT ALUMINUM TRIHYDROXIDE ... 

Alumina trihydrate Aluminic acid. See Aluminum hydroxide Aluminium. SeeAluminum... 

Alumina Hydrate RH-10W, Alumina Hydrate RH-20, Alumina Hydrate RH-30, Alumina hydrate Alumina hydrated. See Aluminum hydroxide Aluminasol 100, Aluminasol 200, Alumina, Tabular 635, Alumina, tabular. See Alumina Aluminate, calcium. See Calcium aluminate Aluminate, sodium. See Sodium aluminate Alumina Trihydrate 617. See Alumina Alumina trihydrate. See Aluminum hydroxide Aluminex-1. See Polyaluminum chloride Aluminic acid. See Aluminum hydroxide Aluminium. See Aluminum Aluminium oxide alumite Aluminium oxydes C. See Alumina... 

Synonyms Alumina hydrate Alumina hydrated Alumina trihydrate Aluminic acid Aluminum hydrate... 

Alumina trihydrate Aluminic acid. See Aluminum hydroxide Aluminium decanoate. See Aluminum caprate Aluminium oxide alumite Aluminium oxydes C. See Alumina Aluminosilicates, zeolites. See Zeolite... 

Heyrovsky, J. (1920) The electroaffinity of aluminium. Part III. The acidity and constitution of aluminic acid. J. Chem. Soc, 1013-1025. 

These equilibria give rise to an acidic solution in water, to the hexahydroxo-aluminate ion [Al(OH)f,]- in a strongly alkaline... 

Aluminium oxide is a white solid, insoluble in water, with a very high melting point. If heated above red heat, it becomes insoluble in acids and alkalis, and can only be brought into solution by first fusing it with sodium or potassium hydroxide when an aluminate is formed. 

Aluminous and siliceous residues A 2% hydrofluoric acid solution followed by concentrated sulfuric acid rinse immediately with distilled water followed by a few milliliters of acetone. Repeat rinsing until all trace of acid is removed. 

Anhydrous aluminum triduotide, A1F., is a white crystalline soHd. Physical properties are Hsted ia Table 2. Aluminum duotide is spatingly soluble ia water (0.4%) and iasoluble ia dilute mineral acids as well as organic acids at ambient temperatures, but when heated with concentrated sulfuric acid, HF is hberated, and with strong alkah solutions, aluminates are formed. A1F. is slowly attacked by fused alkahes with the formation of soluble metal duotides and aluminate. A series of double salts with the duotides of many metals and with ammonium ion can be made by precipitation or by soHd-state reactions. 

There are several processes available for the manufacture of cryoHte. The choice is mainly dictated by the cost and quaUty of the available sources of soda, alumina, and fluoriae. Starting materials iaclude sodium aluminate from Bayer s alumina process hydrogen fluoride from kiln gases or aqueous hydrofluoric acid sodium fluoride ammonium bifluoride, fluorosiUcic acid, fluoroboric acid, sodium fluosiUcate, and aluminum fluorosiUcate aluminum oxide, aluminum sulfate, aluminum chloride, alumina hydrate and sodium hydroxide, sodium carbonate, sodium chloride, and sodium aluminate. 

The manufacture of cryoHte is commonly iategrated with the production of alumina hydrate and aluminum trifluoride. The iatermediate stream of sodium aluminate from the Bayer alumina hydrate process can be used along with aqueous hydrofluoric acid, hydrogen fluoride kiln gases, or hydrogen fluoride-rich effluent from dry-process aluminum trifluoride manufacture. 

Hydrocarbon resins based on CPD are used heavily in the adhesive and road marking industries derivatives of these resins are used in the production of printing inks. These resins may be produced catalyticaHy using typical carbocationic polymerization techniques, but the large majority of these resins are synthesized under thermal polymerization conditions. The rate constants for the Diels-Alder based dimerization of CPD to DCPD are weU known (49). The abiHty to polymerize without Lewis acid catalysis reduces the amount of aluminous water or other catalyst effluents/emissions that must be addressed from an environmental standpoint. Both thermal and catalyticaHy polymerized DCPD/CPD-based resins contain a high degree of unsaturation. Therefore, many of these resins are hydrogenated for certain appHcations. 

The lanthanum phosphate phosphor is usually prepared by starting with a highly purified coprecipitated oxide of lanthanum, cerium, and terbium blended with a slight excess of the stoichiometric amount of diammonium acid phosphate. Unlike the case of the aluminate phosphor, firing is carried out in an only slightly reducing or a neutral atmosphere of nitrogen at a temperature 1000° C. Also this phosphor is typically made with the addition of a flux,... 

Typical gels are prepared from aqueous solutions of reactants such as sodium aluminate, NaOH, and sodium siUcate other reactants include alumina trihydrate (AI2O2 3H2O), coUoidal siUca, and siUcic acid. Some synthetic 2eohtes prepared from sodium aluminosihcate gels are given in Table 3. 

Cryolite. Cryofite [15096-52-3] Na AlF, is the primary constituent of the HaH-Hfiroult cell electrolyte. High purity, natural cryofite is found in Greenland, but its rarity and cost have caused the aluminum industry to substitute synthetic cryofite. The latter is produced by the reaction of hydrofluoric acid [7664-39-3] HE, with sodium aluminate [1302-42-7] NaA102, from the Bayer process... 

Aluminum nitrate nonahydrate is prepared by dissolving aluminum or aluminum hydroxide in dilute nitric acid, and crystaUi2ing the product from the resulting aqueous solution. It is made commercially from aluminous materials such as bauxite. Iron compounds may be extracted from the solution with naphthenic acids (21) before hydrate precipitation. In the laboratory it is prepared from aluminum sulfate and barium nitrate. 

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