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Inorganic silicone Profile Name: Silicone alias: silicone rubber; silica gel or silicic acid gel English name: Silica gel; Silica Formula: xSio 2 · yH2O Molecular Weight: 60.08 CAS Registry Number: CAS # 112926-00-8 EINECS No.: 231-545-4 words to explain: The chemical formula xSiO 2 · yH 2 O. Transparent or milky white granular solid. Has an open porous structure, strong adsorption, can absorb a variety of substances. Adding dilute sulfuric acid (or hydrochloric acid) and allowed to stand in an aqueous solution of sodium silicate, hydrous silicic acid gel and became solidified. Washed with water to clear the electrolyte dissolved therein, Na + and SO 4 2 - (Cl-) ions, the dried silica gel can be obtained. Such as the absorption of water, amounted to about 40% moisture. For gas drying, gas absorption, liquid dewatering layer chromatography, etc., are also used as the catalyst. Such as cobalt chloride, dry blue to red after absorbing water. Renewable repeated use. Safety performance silica gel main ingredient is silica, chemically stable, and does not burn. Silica gel is an amorphous silica dust in the workshop content should be controlled to not more than 10 mg / m need to strengthen exhaust, wear a mask operation. Silicone has a strong adsorption capacity, can produce a drying effect on the skin, therefore, the operation should wear overalls. If the silicone into the eyes, need plenty of water and seek medical treatment as soon as possible. Blue Silicone contain small amounts of cobalt chloride, toxic, should be avoided and food contact and inhalation of the mouth, such as the occurrence of poisoning should immediately seek medical treatment. Silica gel during use due to the adsorption of water vapor in the medium or other organic substances, the adsorption capacity decreased throughput reused after regeneration. Regeneration of silica gel silica gel adsorbed water vapor adsorption of water by thermal desorption of water removed, heated variety, such as an electric furnace flue waste heat heating and hot air drying. Appropriate the desorption heating temperature control in the 120 - 180 ° C, blue gel indicator silica gel, DL blue silicone control in the 100 - 120 ° C is appropriate. The various industrial silicone regeneration when the maximum temperature should not exceed the following limits.
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