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 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 chlorosilanes of the general formula H4-nSiCln with n=1, 2, 3, and/or 4, the process being characterized in that silicon in a silicon bed is reacted with Cl2 or HCl and with at least one silicon-containing compound in a reactor.

Abstract: The present invention relates to a process for preparing trichlorosilane and optionally, if required, HCDS and OCTS, by a) in a first step, allowing silicon tetrachloride and silicon to react at a temperature of >800 to 1450° C.

Abstract: The invention relates to a process for treating a substantially water-containing amino-functional, polymeric catalyst precursor while retaining the inner porous structure thereof and the outer spherical form thereof to form a catalyst, in which the catalyst precursor is treated at mild temperatures and under reduced pressure to prepare a catalyst having a water content below 2.5% by weight. The process is preferably integrated into an industrial scale process for preparing dichlorosilane, monosilane, silane, or solar silicon or semiconductor silicon from silanes.

Abstract: The invention relates to a complete method for producing pure silicon that is suitable for use as solar-grade silicon, comprising the reduction of a purified silicon oxide using one or more pure carbon sources, the purified silicon oxide, which was purified as silicon oxide dissolved in an aqueous phase, having a content of other polyvalent metals or metal oxides, in relation to the silicon oxide, of less than or equal to 300 ppm, preferably less than 100 ppm, especially preferably less than 50 ppm and according to the invention less than 10 ppm of the other metals and being obtained advantageously by gel formation in alkaline conditions. The invention also relates to a formulation containing an activator and to the use of purified silicon oxide together with an activator for producing silicon.

Abstract: The invention relates to a plant for carrying out chemical processes comprising at least means for directly carrying out the conversion in the form of means for developing products and/or in the form of at least one reactor for the continuous industrial manufacture of products, devices for receiving and/or providing starting materials and/or products and devices for controlling the conversion, which are combined to a single integrated and transportable functional unit serving as infrastructure, preferably in the form of a standardised transport container.

Abstract: The present invention relates to a specific process for preparing organosilane esters of the formula (I) and a composition comprising more than 98% by weight of organosilane esters of the formula (I) and less than 2.0% by weight of at least one hydrocarbon and to the use of such a composition as precursor for producing a layer or film having a dielectric constant of 1<??4.

Abstract: The present invention relates to a process for producing an SiO2-containing insulating layer on chips and the use of specific precursors for this purpose. The invention further relates to an insulating layer obtainable in this way and also to chips which have been provided with such an insulating layer.

Abstract: A process for the preparation of a polymerizable dental composition comprising the steps of (a) preparing a liquid mixture comprising (i) 1 to 99% w/w of a hybrid monomer component containing at least one hybrid monomer compound having one hydrolysable siloxane group and at least one polymerizable organic moiety, and (ii) 99 to 1% w/w of a monomer component polymerizable with the polymerizable organic moiety of the hybrid monomer compounds; and (b) adding at least a stoichiometrically sufficient amount of water to the mixture to hydrolyse the hydrolysable siloxane group of the hybrid monomer compound and to form spherical polymerizable nanoparticles having an average particle size of from 1 to 100 nm dispersed in the monomer component, whereby the nanoparticles have a structure with Si—O—Si bonds and peripherally exposed polymerizable organic moieties.

Abstract: The present invention relates to a specific process for preparing organosilane esters of the formula (I) and a composition comprising more than 98% by weight of organosilane esters of the formula (I) and less than 2.0% by weight of at least one hydrocarbon and to the use of such a composition as precursor for producing a layer or film having a dielectric constant of 1<??4.

Abstract: The present invention relates to a composition for coating metals to protect against corrosion, comprising (i) a sol based on silicon compounds, (ii) at least one aminoalkyl-functional alkoxysilane and/or (iii) at least one reaction product of components (i) and (ii), the amount of aminoalkyl-functional silane component from (ii) and (iii) being in total from 0.01 to 15% by weight, calculated as the particular aminoalkylalkoxysilane used and based on the SiO2 content of the sol as per (i); to a process for preparing such a composition, and to its use.

Abstract: The present invention relates to a coating on a metal to protect against corrosion, comprising the following layer sequence: (i) metal surface, (ii) layer based on a sol containing silicon compounds, (iii) layer based on at least one organosilane, (iv) if desired, one or more coating films. The present invention further relates to a process for producing such a coating and to the use thereof.

Abstract: A process for the preparation of a polymerizable dental composition comprising the steps of