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Information @ a Glance

General

  • Chlorosilanes are compounds in which silicon is bonded to from one to four chlorine atoms with other bonds to hydrogen and/or alkyl groups. Chlorosilanes react with water, moist air, or steam to produce heat and toxic, corrosive fumes of hydrogen chloride. They may also produce flammable gaseous H2.
  • Chlorosilanes are a group of reactive, chlorine-containing chemical compounds, related to silane and used in many chemical processes. Each such chemical has at least one silicon-chlorine bond.

Process

  • Chlorosilanes are prepared by the Rochow process, which involved treating silicon with hydrogen chloride at elevated temperatures in the presence of a copper catalyst.
  • Raw Materials required to prepare Chlorosilanes are Hydrogen chloride, Methyl Chloride, Silicon and Copper Catalyst. The technology is based on a new method for producing monosilane from silicon tetrachloride by its interaction with lithium hydride. The method is new in the aspect of implementation because a method of converting silicon tetrachloride to monosilane by lithium hydride in a salt melt has been know previously.

Technology

  • The technology is based on a new method for producing monosilane from silicon tetrachloride by its interaction with lithium hydride. The method is new in the aspect of implementation because a method of converting silicon tetrachloride to monosilane by lithium hydride in a salt melt has been know previously.
  • Cryogenic purification of the resulting monosilane converts it to a commodity product suitable for many applications in microelectronics and in the production of high-purity polycrystalline silicon

Uses

  • Chlorosilanes are chemical compounds made up of silicon, carbon, hydrogen and chlorine. They are used to manufacture silicone products.
  • Chlorosilanes are essential raw materials in the electronics and telecommunications industries and are used for the production of optical fibers, silicon wafers and chips, as well as the starting material for fumed silicas.

Market

  • Publicly available data on world or even national production and trade of chlorosilanes is quite scarce. 60-65% of trichlorosilane production is reportedly consumed in the semiconductor sector , thus an estimate of world production can be obtained through knowledge of the amount used in semiconductors.
  • The total amount of silicon metal used in the semiconductor sector in 1998 is estimated at 53,000 tons . Using production data on the production process, one can estimate that 228,000 metric tons of trichlorosilane was from this input. From this, world production of trichlorosilane is perhaps 350,000-380,000 tons per annum.

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