Abstract: Described is a method for producing alkenyl halosilanes by reacting alkenyl halide selected from the group comprising vinyl halide, vinylidene halide, and allyl halide with halosilane selected from the group comprising monohalosilane, dihalosilane, and trihalosilane in the gas phase in a reactor comprising a reaction tube (1) that has an inlet (2) at one end and an outlet (3) at the other end, said reactor further comprising an annular-gap nozzle (4) that is mounted on the inlet (2), extends into the reaction tube (1), and has a central supply duct (5) for one reactant (7) and a supply duct (6), which surrounds the central supply duct (5), for the other reactant (8). In order to carry out said method, alkenyl halide is injected into the reaction tube (1) through the central supply duct (5), halosilane is injected thereinto through the surrounding supply duct (6), and both substances flow through the reaction tube (1) in the direction of the outlet (3).

Abstract: What is described is a process for continuously esterifying halosilanes of the formula I with alcohols of the formula II to give silane esters of the formula III in a single column (1) R1aSiHalb??(I) R2—(OH)??(II) R1aS—(OR2)b??(III) in which R1 is hydrogen or a monovalent organic radical, where any two R1 radicals within a molecule may be different within the scope of the given definitions, Hal is a halogen atom, a plurality of Hal atoms within a molecule may be different within the scope of the given definitions, R2 is a monovalent organic radical, a and b are integers from 0 to 4 and the sum total of a and b is 4, comprising the measures of: i) feeding the total amount of the halosilane of the formula I required for the reaction in liquid form through line (6) into the upper third of the column (1), ii) feeding at least 60% by weight of the alcohol of the formula II required for the reaction in liquid form through line (7) into the upper third of the column (1), iii) feeding the remainder of the a

Abstract: A process for preparing alkenylhalosilanes by reacting alkenyl halide in the gas phase in a reactor comprising a reaction tube (1) equipped with an inlet (2) at one end of the tube and with an outlet (3) at the other end of the tube, and having a gas inlet device (4) having a plurality of gas feed points (5) that are spaced apart in the direction of the longitudinal axis of the reaction tube (1) and open into the reaction tube (1). The process permits the preparation of alkenylhalosilanes in high yield and with high selectivity. The formation of soot is distinctly lower compared to conventional reactors.

Abstract: What is described is a process for continuously esterifying halosilanes of the formula I with alcohols of the formula II to give silane esters of the formula III in a single column (1) R1aSiHalb ??(I) R2—(OH) ??(II) R1aS—(OR2)b ??(III) in which R1 is hydrogen or a monovalent organic radical, where any two R1 radicals within a molecule may be different within the scope of the given definitions, Hal is a halogen atom, a plurality of Hal atoms within a molecule may be different within the scope of the given definitions, R2 is a monovalent organic radical, a and b are integers from 0 to 4 and the sum total of a and b is 4, comprising the measures of: i) feeding the total amount of the halosilane of the formula I required for the reaction in liquid form through line (6) into the upper third of the column (1), ii) feeding at least 60% by weight of the alcohol of the formula II required for the reaction in liquid form through line (7) into the upper third of the column (1), iii) feeding the remainder

Abstract: Described is a method for producing alkenyl halosilanes by reacting alkenyl halide selected from the group comprising vinyl halide, vinylidene halide, and allyl halide with halosilane selected from the group comprising monohalosilane, dihalosilane, and trihalosilane in the gas phase in a reactor comprising a reaction tube (1) that has an inlet (2) at one end and an outlet (3) at the other end, said reactor further comprising an annular-gap nozzle (4) that is mounted on the inlet (2), extends into the reaction tube (1), and has a central supply duct (5) for one reactant (7) and a supply duct (6), which surrounds the central supply duct (5), for the other reactant (8). In order to carry out said method, alkenyl halide is injected into the reaction tube (1) through the central supply duct (5), halosilane is injected thereinto through the surrounding supply duct (6), and both substances flow through the reaction tube (1) in the direction of the outlet (3).

Abstract: What is described is a process for preparing alkenylhalosilanes by reacting alkenyl halide selected from the group of vinyl halide, vinylidene halide and allyl halide with halosilane selected from the group of mono-, di- and trihalosilane in the gas phase in a reactor comprising a reaction tube (1) equipped with an inlet (2) at one end of the tube and with an outlet (3) at the other end of the tube, and having a gas inlet device (4) having a plurality of gas feed points (5) which are spaced apart in the direction of the longitudinal axis of the reaction tube (1) and open into the reaction tube (1). To perform the process, mono-, di- or trihalosilane is passed through the inlet (2) into the reaction tube (1) and flows through the reaction tube (1) in the direction of outlet (3), and vinyl halide, vinylidene halide or allyl halide flows through the gas feed points (5) in sections into the gas stream in the interior of the reaction tube (1).

Abstract: The invention relates to a process for producing hydrogen-containing chlorosilanes by reducing Si-based deposits of solid material during the operation of a pressurised reactor comprising one or more reaction spaces, wherein at least one organochlorosilane is reacted with hydrogen in at least one of these reaction spaces for at least some of the time, characterized in that at least one of the optionally two or more reaction spaces in which this reaction takes place is supplied with additional HCl for at least some of the time. The additional HCl is preferably produced by hydrodehalogenation of silicon tetrachloride with hydrogen in at least one of the optionally two or more reaction spaces of the reactor.

Abstract: The invention relates to a process for producing a product gas mixture containing hydrogen-containing chlorosilanes within an integrated process by hydrogenating integrated process by-product silicon tetrachloride and organochlorosilane, more particularly methyltrichlorosilane, with hydrogen in a pressurized hydrogenation reactor comprising one or more reaction spaces each consisting of a reactor tube of gastight ceramic material, wherein the product gas mixture is worked up and at least a portion of at least one product of the product gas mixture is used as starting material for the hydrogenation or as starting material for some other process within the integrated process. The invention further relates to an integrated system useful for practising the integrated process.

Abstract: The invention relates to a process for preparing trichlorosilane, characterized in that hydrogen and at least one organic chlorosilane are reacted in a reactor which is operated under superatmospheric pressure and comprises one or more reactor tubes which consist of a gastight ceramic material.

Abstract: The invention provides for the use of a particular burner design to heat reactors for conversion of chlorosilanes, wherein the burner has a jet tube and the jet tube surrounds the flame and the flame tube in a gastight manner, as a result of which the combustion air, the gaseous and/or liquid fuels, and also the flue gases cannot get into the reaction furnace space. The advantage is the complete separation of the flue gas from the actual interior of the reaction furnace, which prevents critical interactions between flue gas moisture and chlorosilanes in the case of fracture of the arrangement accommodating the chlorosilanes. This in turn makes it possible to use gaseous or liquid fuels to heat such a reaction furnace. Excessive local input of heat as a result of direct flame contact is prevented; the heat input is homogenized.

Abstract: The invention relates to the use of a ceramic tube composed of silicon carbide variants in processes for converting chlorosilanes, wherein the tube has a flange or a flare at one end and is closed at the other end.

Abstract: The present invention relates to a process for preparing glycidyloxy-alkylalkoxysilanes of the general formula (I) (R?)O—CnH2nSi(R?)m(OR)3-m(I) in which R and R? groups are each independently linear or branched alkyl groups having from 1 to 4 carbon atoms, n is 1, 2, 3, 4, 5, 6, 7 or 8 and m is 0, 1, 2 or 3, and R? is an H2C(O)CH— or H2C(O)CHCH2— group, by reacting (i) a functionalized alkene of the general formula (II) (R?)O—CnH2n-1(II) in which R? is an H2C(O)CH— or H2C(O)CHCH2— group and n is 1, 2, 3, 4, 5, 6, 7 or 8 with (ii) at least one hydroalkoxy-silane of the general formula (III) HSi(R?)m(OR)3-m (III) in which R and R? groups are each independently linear or branched alkyl groups having from 1 to 4 carbon atoms and m is 0, 1, 2 or 3, in the presence (iii) of at least one homogeneous catalyst, (iv) of at least one solvent and/or of a diluent and (v) of at least one promoter.

Abstract: The invention relates to a method for reducing the content of boron-containing compounds in compositions I comprising at least one silicon halide, especially of chlorosilanes of the type HnSiCI4-n with n being equal to 0, 1, 2 or 3, by introducing a small amount of moisture into the composition I in a first step and separating the hydrolyzed boron- and/or silicon-containing compounds in a second step in such a way that a pre-purified composition II having a reduced boron content is obtained, wherein, in particular, the first and second steps can be run in at least one or more cycles. Also claimed is an apparatus for performing the method and an overall system into which this apparatus is integrated.

Abstract: The present invention relates to a system, a reactor and a process for the continuous industrial conduct of a reaction where a b-unsaturated aliphatic polyether compound A is reacted with an HSi compound B in the presence of a catalyst C and optionally of other auxiliaries, and the system is at least based on the system (3) for combining the starting materials for components A (1) and B (2), on at least one multielement reactor (5) which in turn comprises at least two reactor units in the form of exchangeable pre-reactors (5.1) and comprises at least one further reactor unit (5.3) downstream of the pre-reactors, and on a product-work-up system (8).

Abstract: The present invention relates to a system, to a reactor and to a process for continuous industrial performance of a reaction wherein allyl methacrylate A is reacted with an HSi compound B in the presence of a catalyst C and optionally of further assistants, and the system is based at least on the combination of reactants (3) for components A (1) and B (2), at least one multielement reactor (5) which, in turn, comprises at least two reactor units in the form of exchangeable pre-reactors (5.1) and at least one further reactor unit (5.3) connected downstream of the pre-reactors, and on a product workup (8).

Abstract: The present invention relates to a system, to a reactor and to a process for continuous industrial performance of a reaction wherein allyl glycidyl ether A is reacted with an HSi compound B in the presence of a catalyst C and optionally of further assistants, and the system is based at least on the combination of reactants (3) for components A (1) and B (2), at least one multielement reactor (5) which in turn comprises at least two reactor units in the form of exchangeable pre-reactors (5.1) and at least one further reactor unit (5.3) connected downstream of the prereactors, and on a product workup (8).

Abstract: The present invention relates to a process for preparing glycidyloxy-alkylalkoxysilanes of the general formula (I) (R?)O—CnH2nSi(R?)m(OR)3-m (I) in which R and R? groups are each independently linear or branched alkyl groups having from 1 to 4 carbon atoms, n is 1, 2, 3, 4, 5, 6, 7 or 8 and m is 0, 1, 2 or 3, and R? is an H2C(O)CH— or H2C(O)CHCH2— group, by reacting (i) a functionalized alkene of the general formula (II) (R?)O—CnH2n-1(II) in which R? is an H2C(O)CH— or H2C(O)CHCH2— group and n is 1, 2, 3, 4, 5, 6, 7 or 8 with (ii) at least one hydroalkoxy-silane of the general formula (III) HSi(R?)m(OR)3-m (III) in which R and R? groups are each independently linear or branched alkyl groups having from 1 to 4 carbon atoms and m is 0, 1, 2 or 3, in the presence (iii) of at least one homogeneous catalyst, (iv) of at least one solvent and/or of a diluent and (v) of at least one promoter.

Abstract: The present invention relates to a system, to a reactor and to a process for continuous industrial performance of a reaction wherein an ?,?-unsaturated fluorine-substituted olefin A is reacted with an HSi compound B in the presence of a catalyst C and optionally of further assistants, and the system is based at least on the combination of reactants (3) for components A (1) and B (2), at least one multielement reactor (5) which, in turn, comprises at least two reactor units in the form of exchangeable prereactors (5.1) and at least one further reactor unit (5.3) connected downstream of the prereactors, and on a product workup (8).

Abstract: The invention relates to a device and a method for producing mono-, oligo- and/or polyborosilazanes that contain carbon. According to said method (i) a one-component precursor compound is reacted with ammonia or an organic amino in an aminolysis step, (ii) a reaction mixture is extracted at least once from the aminolysis in a continuous extraction step using an organic solvent, (iii) ammonia or a phase containing organoamine that accumulates during the extraction process is discarded, recovered or at least partly recirculated and (iv) mono-, oligo- and/or polyborosilazanes containing carbon are obtained from the extraction phase containing the solvent.