Rhodia Silica Systems : use of silica, HDS silica, precipitated silica, ...

Silica, or silicon dioxide, SiO2, in its pure form is colorless to white. Silica is widely and abundantly distributed throughout the earth, both in the pure state and in silicates, (e.g., in quartz, agate, amethyst, chalcedony, flint, jasper, onyx and rock crystal), opal, sand, sandstone, clay, granite and many other rocks. Silica occurs in several forms and is involuable in water, slightly soluble in alkalies and soluble in dilute hydrofluoric acid.
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The range of silica :
Crystalline silicon dioxide, Non-Crystalline, Fumed silica, precipitated silica, silica gel, Colloidal silica.
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The use of silica :
Tire & Rubber Goods (Manufactured Rubber Goods & Tire)
Polymer Performance (Organic Rubber For Footwear, Plastics and TPE, Polymer for Membranes
Silicone Elastomers), Nutritions & Industrial (Specialties, Nutritions, Industrial Specialties), Performance Silicas (Dentifrice)
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The manufacturing process :
Precipitated silicas are produced by chemical reactions and precipitation, which is achieved by neutralizing a solution of sodium silicate with an acid, often sulfuric acid.The by-product, sodium sulfate, is eliminated via filtration. The remaining silica is then dried and formed based on its final application. The precipitation stage determined the microscopic particle morphology for most of the silica's application properties.
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On Rhodia-silica.com, find content about :
Use of Silica, silica products, silica range, silica for industry, green tire, HDS, performance silica, precipitated silica, amourphous silica, silica gel, silicone dioxide, silica characteristics (Ph, technology, density), silica expertise, silica functions, silica utilization.