Abstract: The invention relates to a process for preparing dimeric and/or trimeric silanes by reaction of monosilane in noble gas in a non-thermal plasma, and also to a plant for performance of this process.

Abstract: A controlled preparation of octachlorotrisilane and higher polychlorosilane such as DCTS and DCPS from monomeric chlorosilane, proceeds by exposing the chlorosilane to a nonthermal plasma and recycling chlorosilane that has not been converted to octachlorotrisilane into the plasma.

Abstract: An apparatus for chlor-alkali electrolysis, comprising a cathode half-cell, an oxygen-consuming electrode arranged therein, a conduit for supply of gaseous oxygen to the cathode half-cell and a conduit for purging the cathode half-cell with inert gas, enables the flexible use of power by a method in which chlorine is produced in the apparatus by chlor-alkali electrolysis, wherein, when power supply is low, the oxygen-consuming electrode is supplied with gaseous oxygen, and oxygen is reduced at the oxygen-consuming electrode at a first cell voltage, and when power supply is high, the oxygen-consuming electrode is not supplied with any oxygen, and hydrogen is generated at the cathode at a second cell voltage which is higher than the first cell voltage.

Abstract: Silicon-containing particles are used for protection of human cells from electromagnetic radiation in the UV range and optionally in the visible as far as the IR range, where the particles preferably take the form of clusters of primary particles having a particle size in the range from 5 to 100 nm. A particular advantage is the possibility of matching the absorption of the electromagnetic radiation to the wavelength region to be absorbed in a defined manner via the particle size. The silicon-containing particles can be used for biocompatible and biodegradable UV protection in cosmetic or medical formulations, such as preferably a sunscreen, or else in a cosmetic formulation for the UV protection of hair.

Abstract: Silicon-containing particles are used for protection of industrial materials, such as electrooptical layers or electrooptical components, from electromagnetic radiation in the UV range and optionally in the visible as far as the IR range, wherein the particles take the form of primary particles having a particle size in the range from 1 to 100 nm and may optionally take the form of clusters of the primary particles. A particular advantage is the possibility of matching the absorption of the electromagnetic radiation to the wavelength region to be absorbed that is of interest in a defined manner via the particle size and the particle size distribution. The silicon-containing particles can be used as biocompatible and biodegradable UV protection in industrial applications and compositions for industrial applications as formulations, such as preferably in coating compositions, such as paint.

Abstract: Hollow bodies having a silicon-comprising shell, are produced by, in a gas comprising at least one silane of the general formula SinH2n+2?mXm with n=1 to 4, m=0 to 2n+2 and X=halogen, (a) generating a non-thermal plasma by an AC voltage of frequency f, or operating a light arc, or introducing electromagnetic energy in the infrared region into the gas, giving a resulting phase which (b) is dispersed in a wetting agent and distilled, and then (c) the distillate is contacted at least once with a mixture of at least two of the substances hydrofluoric acid, nitric acid, water, giving a solid residue comprising hollow bodies having a silicon-comprising shell after the conversion reaction of the distillate with the mixture has abated or ended.

Abstract: The present invention relates to an integrated plant which comprises a plant for the electrothermic production of hydrogen cyanide and a separating device for separating hydrogen cyanide from the reaction mixture of the electrothermic production of hydrogen cyanide while obtaining at least one stream of gas containing hydrogen and/or hydrocarbons, the integrated plant having a device for introducing a gas into a natural gas network, to which device a stream of gas containing hydrogen and/or hydrocarbons is fed from the separating device via at least one conduit. This integrated plant affords flexible use of electricity by a method in which a stream of gas, containing hydrogen and/or hydrocarbons, is fed into a natural gas network from the separating device and the amount and/or the composition of the stream of gas fed into the natural gas network is changed in dependence on the electricity supply.

Abstract: The present invention relates to an integrated plant which comprises a plant for the electrothermic production of hydrogen cyanide and a plant for electricity generation, the plant for the electrothermic production of hydrogen cyanide being connected to the plant for electricity generation via a conduit and electricity being generated in the plant for electricity generation from a product gas obtained in the plant for the electrothermic production of hydrogen cyanide. This integrated plant affords flexible use of electricity by a method in which, at times of a high electricity supply, the plant for the electrothermic production of hydrogen cyanide is operated and at least some of the hydrogen and/or gaseous hydrocarbons obtained in addition to hydrogen cyanide is stored and, at times of a low electricity supply, stored hydrogen and/or gaseous hydrocarbons are fed to the plant for electricity generation.

Abstract: The invention relates to a process for converting polychlorosilanes into hexachlorodisilane, by one or more trimeric polychlorosilanes or a trimeric polychlorosilane in a mixture with higher molecular weight polychlorosilanes being exposed to a gas discharge and hexachlorodisilane being formed and isolated.

Abstract: The invention relates to a process and an apparatus for controlled preparation of octachlorotrisilane from monomeric chlorosilanes, by subjecting the chlorosilanes to a thermal plasma.

Abstract: The invention relates to a process for preparing dimeric and/or trimeric silanes by conversion of monosilane in a plasma and to a plant for performance of the process.

Abstract: The invention relates to a process and an apparatus for preparation of polychlorosilanes from monomeric chlorosilanes, by subjecting the chlorosilanes to a thermal plasma.

Abstract: The invention relates to a process for preparing polysilanes by converting monosilane in the presence of hydrogen in a plasma, and to a plant for performing the process.

Abstract: The invention relates to a process for preparing monochlorosilane by reaction of monosilane and dichlorosilane in the presence of a catalyst. In the process of the invention, monochlorosilane is formed by comproportionation of monosilane and dichlorosilane. The invention further relates to the use of the monochlorosilane produced and also a plant for carrying out the process.

Abstract: The present invention relates to an integrated plant which comprises a plant for the electrothermic production of ethyne and a plant for electricity generation, the plant for the electrothermic production of ethyne being connected to the plant for electricity generation via a conduit and electricity being generated in the plant for electricity generation from a product gas obtained in the plant for the electrothermic production of ethyne. This integrated plant affords flexible use of electricity by a method in which, at times of a high electricity supply, the plant for the electrothermic production of ethyne is operated and at least some of the hydrogen and/or gaseous hydrocarbons obtained in addition to ethyne is stored and, at times of a low electricity supply, stored hydrogen and/or gaseous hydrocarbons are fed to the plant for electricity generation.

Abstract: The present invention relates to an integrated plant which comprises a plant for the electrothermic production of ethyne and a separating device for separating ethyne from the reaction mixture of the electrothermic production of ethyne while obtaining at least one stream of gas containing hydrogen and/or hydrocarbons, the integrated plant having a device for introducing a gas into a natural gas network, to which device a stream of gas containing hydrogen and/or hydrocarbons is fed from the separating device via at least one conduit. This integrated plant affords flexible use of electricity by a method in which a stream of gas, containing hydrogen and/or hydrocarbons, is fed into a natural gas network from the separating device and the amount and/or the composition of the stream of gas fed into the natural gas network is changed in dependence on the electricity supply.

Abstract: The invention relates to a method for producing dimeric and/or trimeric silicon compounds, in particular silicon halogen compounds. The claimed method is also suitable for producing corresponding germanium compounds. The invention also relates to a device for carrying out said method to the use of the produced silicon compounds.

Abstract: The present invention relates to a method for limiting the load of electricity transmission networks, comprising the generation of heat by operating an apparatus for the oxidation of a hydrocarbon-containing gas, in which alternatively a required provision of heat from the oxidation of the hydrocarbon-containing gas is substituted by the provision of heat from electrical energy with an apparatus for providing heat by using electrical power and the hydrocarbon-containing gas that is not oxidized is provided. A facility for carrying out the present method is also described.

Abstract: The present invention relates to a method for obtaining a hydrocarbon-containing gas, comprising the generation of heat by operating an apparatus for the oxidation of a hydrocarbon-containing gas, characterized in that alternatively a required provision of heat from the oxidation of the hydrocarbon-containing gas is substituted by the provision of heat from electrical energy with an apparatus for providing heat by using electrical power and the hydrocarbon-containing gas that is not oxidized is provided. A facility for carrying out the present method is also described.

Abstract: A method for modification of a methane-containing gas stream, comprising the steps of: i) withdrawal of at least one substream from a methane-containing gas stream; ii) treatment of the substream with an electrically generated plasma, generating a modified gas composition which comprises a lower fraction of methane than the methane-containing gas stream used and iii) return of modified gas composition into the methane-containing gas stream. This method makes possible the storage of excess power in a natural gas line grid.