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Toxicological Chemistry of Chemical Substances
Published in Stanley E. Manahan, Environmental Chemistry, 2022
Silicon tetrachloride, SiCl4, is the only industrially significant compound of the silicon tetrahalides, a group of compounds with the general formula SiX4, where X is a halogen. The two commercially produced silicon halohydrides, general formula H4−xSiXx, are dichlorosilane (SiH2Cl2) and trichlorosilane, (SiHCl3). These compounds are used as intermediates in the synthesis of organosilicon compounds and in the production of high-purity silicon for semiconductors. Silicon tetrachloride and trichlorosilane, fuming liquids that react with water to give off HCl vapor, have suffocating odors and are irritants to eye, nasal, and lung tissue.
Alternative Energy: Photovoltaic Solar Cells
Published in Brian D. Fath, Sven E. Jørgensen, Megan Cole, Managing Air Quality and Energy Systems, 2020
Such silicon is the raw material for the production of pure silicon. It is also used in steel and aluminium production as a supplementary material. The most important producers of raw silicon are Canada, Norway, and Brazil. Fifteen to twenty-five kilowatt-hours of electrical energy is needed to produce 1 kg of silicon. Silicon tetrachloride (tetrachlorosilane) gas is obtained by the chlorination of finely ground metallurgical-grade silicon in a special reactor. Additions or impurities are eliminated in the form of chlorine salt.
Silicones
Published in Leslie R. Rudnick, Synthetics, Mineral Oils, and Bio-Based Lubricants, 2020
Robert Perry, Clay Quinn, Frank Traver, Kedar Murthy
The silicon tetrachloride is derived from quartzite rock, oil coke (carbon), and chlorine gas: SiO2+2C→Si+2CO(electricfurnace)Si+2Cl2+heat→SiCl4
Corrosion resistance behaviour of concrete containing treated used foundry sand
Published in European Journal of Environmental and Civil Engineering, 2023
N. Gurumoorthy, K. Rajesh Kumar, M. Vinod Kumar, K. Hariharan Kannan
The 2.5% HCl treated sample contained 75% silica and 8% iron content, while the 5% HCl treated confined 80% silica contained 3% iron content, according to TUFS EDX test results. Likewise, HCl treated at 10% concentration contain 73% silica besides 0.5% iron. The reaction between silicon and HCl produces silicon tetrachloride, which reduces silica in a solution containing 10% HCl by releasing hydrogen gas (Gurumoorthy & Arunachalam, 2019). It was found that the test results of TUFS were associated with a rise in silica and a reduction in iron component when UFS treated with 5% HCl concentration, which will provide greater binding strength and better corrosion resistance than other concentration of TUFS. Based on the test results, the UFS needed for the casting process was treated with a 5% HCl. This phase of treatment was performed in a fibre reinforced plastic tank. However, the contents were blended and desiccated under sunlight (Gurumoorthy & Arunachalam, 2016; 2019). In addition, the chloride level existing in the TUFS was removed by washing it with water for 24 hours in the mechanical mixer, thus reducing the amount of chloride below the permissible limit in accordance with ACI 318-08 norms (ACI 318-08, 2008).