Aluminium chloride silicates

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... 

Woods contain from 0-2 to 4% of mineral ash. This consists largely of calcium, potassium and magnesium as carbonate, phosphate, silicate and sulphate. Aluminium, iron, sodium and chloride are also present. Sulphate contributes 1 to 10% by weight, usually 2 to 4%, and chloride 01 to 5%. 

Urokinase utilized medically is generally purified directly from human urine. It binds to a range of adsorbents, such as silica gel and, especially, kaolin (hydrated aluminium silicate), which can be used initially to concentrate and partially purify the product. It may also be concentrated and partially purified by precipitation using sodium chloride, ammonium sulfate or ethanol as precipi-tants. 

The EDX spectrum (Fig. 11.8) shows the main surface scale impurity peaks of silica, aluminium, sodium, chloride and iron. If this EDX is compared to that of a new, clean membrane surface (Fig. 11.9), the clean surface shows sulphur, carbon and oxygen, which is typical of a porous polysulphone support. It was concluded that the scale is amorphous, composed of aluminosilicate and silicate. These compounds are normally found in trace amounts in brine solutions. Analysis showed that the surface could be cleaned with hydrochloric acid and analysis of the dissolved scale was similar to the EDX spectrum analysis. Review of the plant operation determined that the precipitation was the result of high pH in combination with high silica concentrations in the brine. 

Furuno, T., Uehara, T. and Jodai, S. (1991). Combinations of wood and silicate I. Impregnation by water glass and applications of aluminium sulfate and calcium chloride as reactants. Mokuzai Gakkaishi, 37(5), 462 72. 

If ZSM-5 type zeolite, which includes a considerable amount of aluminium in the zeolite framework, is treated with metal chloride vapor at elevated temperatures, the metallo-alumino-silicate will be prepared. When ZSM-5 (Si/A1=41) was treated with antimony trichloride vapor at 923 K for 2 h, two absorption... 

The ash of true leather tanned with tannin consists essentially of calcium carbonate with traces of iron and of phosphates. Coloured leathers may contain metals from the mordants used (tin, copper, iron, chromium, aluminium) tin may also be introduced as stannous chloride used for bleaching. Small quantities of silicates (talc, kaolin) may be employed in the treatment of the leather. Finally, other mineral matters (barium, magnesium and lead salts and sodium chloride) may have been added as filling to increase the weight. Complete quantitative analysis of the ash is rarely necessary, but determination of its calcium content is sometimes required, this being made by the ordinary methods. 

Sodium chloride Sodium bromide Sodium iodide Sodium sulphate Sodium silicate Potassium sulphate Lithium chloride Calcium carbonate Calcium sulphate Magnesium sulphate Manganous carbonate Ferrous carbonate. Aluminium phosphate Ammonium nitrate Organic matter... 

Sodium chloride is employed as a glaze for pottery, since at red heat in presence of moisture it combines with the alumina and silica to form a transparent glaze of sodium aluminium silicate. Other technical applications are the manufacture of sodium hydroxide and carbonate, and the isolation of silver and copper from their ores. It also has a dietetic value, and is employed as a preservative for meat. 

Preparation.—By heating aluminium -very strongly in a ourrent of the vapour of silicic chloride. The aluminic chloride which is formed volatilizes, leaving the adamantine silicon behind —... 

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