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Preparation And Stability Of Silane

Qufu Focuschem Trading Co.,Ltd | Updated: Jun 28, 2017

          Silane, a compound of silicon and hydrogen, is a generic term for a range of compounds, including methyl silane (SIH4), ethylene silane (SI2H6), and some higher-grade silicone compounds. The most commonly used is methyl silane. Methyl silane is generally referred to as silane.

          In the reaction bottle and the feeding funnel, respectively 1.14g LiAlH4 in 70mL ether solution and 2.30mL SiCl4 in the 50mL ether in the preparation of the silane solution. During the whole synthesis process, the cold bath and the finger cooling tube were kept in 20 and-78.5 Shan respectively. After the instrument has been evacuated, the ether begins to return and it must be taken care to avoid too much sudden boiling. Then, the U-tube receiver near the reaction device is cooled to the 195 (with toluene jelly) and the remaining four receivers are cooled to 196 (liquid nitrogen). Under stirring, the Sicl ether solution is added to the LiAlH4 suspension by 15min. In order to avoid the heavy reflux of ethyl ether, the methyl silane is separated in a medium speed. The glass pistons between the reactor and the vacuum pipe can easily control the reaction speed. After adding the SICL, continue to stir the 15 20min to ensure that the reaction is complete. During this period, the reactor and vacuum system are cut off lest the ether escape too much. When a silane is drained from the vacuum system, air is discharged into the reactor and the vacuum system is opened.

           Silane Stability: Avoid strong oxidant, alkali, halogen. The gas density in the standard state is 1.444, the relative density of the liquid is 0.68 (185). Vapor pressure 11mmHg (1mm. 322Pa) (160), 102mmHg (140), 470mmHg (120). The wavelength of infrared spectra is 2191cm 1 and 914 1. At room temperature, gas state, in the storage process, no significant decomposition within a few months. Because the silane is almost insoluble in grease, it can be stored in a container with grease on the cork. Silane's chemical properties are much more lively than alkanes and are highly susceptible to oxidation. Spontaneous combustion can occur in contact with air. 25 Shan below and nitrogen do not work, at room temperature and hydrocarbon compounds do not react. Reacted violently with oxygen, even at 180 Shan temperatures. Silane and HCFCs will react violently, so the fire extinguishing agent cannot be used. The explosion limit is 0.8ethers.Silane.