Aluminosilicate napolnitelju 38-10267-84 packing bags 9 kg
Offer type: salePublished: 28.10.2016
| Price: | 25 UAH |
| Seller: |  Trushin Oleg |
| Phones: |  +380501941188 Show phone |
| Address: | Ukraine |
Aluminosilicate napolnitelju 38-10267-84 packing bags 9 kg
Aluminosilicates — a group of natural and synthetic silicates, complex anions which contain silicon and aluminum. Examples of complex anions: [AlSiO4]−, [AlSi4O10]−, [Al2Si3O10]2−. As cations are Na , K , Mg2 , Ca2 , Ba2, and sometimes Li .
Natural aluminosilicates are the most abundant minerals, accounting for up to 50 % of the mass of the earth's crust. These include feldspars (albite, orthoclase, anortite), clay minerals and mica.
Aluminosilicates are insoluble in water, decomposed by hydrofluoric acid, molten alkalis and carbonates of alkaline metals. Some aluminosilicates slowly interact with CO2 and water, under natural conditions, the weathering with the formation of quartz and other minerals.
Natural aluminosilicates containing groups (OH) and crystalline water, are refractory, thermally resistant compounds.
Synthetic aluminosilicates is received with the hydrothermal synthesis (eng.)Russian. when heating the oxides of silicon and SiO2 aluminum Al2O3 with metal oxides.
Application
The silicates on the earth's surface gradually erode with the formation of kaolinite raw material for porcelain industry. The silicates are used as components of the charge in the manufacture of glass, ceramics and cements. Mica found a use as electric and thermal insulation materials. Nepheline is a raw material in the production of aluminium. Natural hydrated aluminosilicates (zeolites) and artificial permutit used as ion-exchange resins (e.g. for water purification), as adsorbents in chromatography and in purification, drying and separation of gases.
The aluminosilicates used in the food industry as food additives Е554, Е555, Е556, Е559.
