Abstract: The invention relates to a process for converting silicon tetrachloride (STC) to trichlorosilane (TCS), by introducing reactant gas containing STC and hydrogen into a reaction zone of a reactor in which the temperature is 1000-1600° C., wherein the reaction zone is heated by a heater located outside the reaction zone and the product gas containing TCS which forms is then cooled, with the proviso that it is cooled to a temperature of 700-900° C. within 0.1-35 ms, wherein the reactant gas is heated by the product gas by means of a heat exchanger working in countercurrent, wherein reactor and heat exchanger form a single, gas-tight component, wherein the component includes one or more ceramic materials selected from the group consisting of silicon carbide, silicon nitride, graphite, SiC-coated graphite and quartz glass.

Abstract: Yield and selectivity of olefin acetoxylation are improved through the use of successive catalyst zones of different reactivities, the successive zones contained in one or more reaction tubes arranged is parallel.

Abstract: Yield and selectivity of olefin acetoxylation are improved through the use of successive catalyst zones of different reactivities, the successive zones contained in one or more reaction tubes arranged is parallel.

Abstract: The invention relates to a process for converting silicon tetrachloride (STC) to trichlorosilane (TCS), by introducing reactant gas containing STC and hydrogen into a reaction zone of a reactor in which the temperature is 1000-1600° C., wherein the reaction zone is heated by a heater located outside the reaction zone and the product gas containing TCS which forms is then cooled, with the proviso that it is cooled to a temperature of 700-900° C. within 0.1-35 ms, wherein the reactant gas is heated by the product gas by means of a heat exchanger working in countercurrent, wherein reactor and heat exchanger form a single, gas-tight component, wherein the component includes one or more ceramic materials selected from the group consisting of silicon carbide, silicon nitride, graphite, SiC-coated graphite and quartz glass.

Abstract: The invention provides alkoxy-crosslinking rubber mixtures (M) which comprise a compound of the general formula (1) M(OR1)n(OSiR23)5-n (1) and polymers with end groups of the general formula (2) —SiR3a(OR4)3-a (2), where M is defined as Nb or Ta, R1, R2; R3 and R4 are each hydrocarbon radicals having 1 to 10 carbon atoms, n is 1, 2, 3 or 4, and a is 0 or 1.

Abstract: The invention relates to a method for continuously producing 2-butanone from 2,3-butanediol in hot pressurized water having an added electrolyte, characterized in that a compound selected from among the group comprising Ce(SO4)2, Fe2(SO4)3, Al2(SO4) is used as the added electrolyte.

Abstract: The invention relates to a method for continuously producing 2-butanone from 2,3-butanediol in hot pressurized water having an added electrolyte, characterized in that a compound selected from among the group comprising Ce(SO4)2, Fe2(SO4)3, Al2(SO4) is used as the added electrolyte.

Abstract: Efficient production of trichorosilane from tetrachlorosilane and hydrogen is effected by reaction at high temperatures over short residence times followed by rapidly cooling the product mixture in a heat exchanger, recovered heat being employed to heat the reactant gases, which are then fed to the reactor in a heated state.

Abstract: Nanosize titanium dioxide having supported thereon metallic platinum are efficient hydrosilylation catalysts whose hydrosilylation activity may be increased by irradiation. The catalysts are prepared by depositing soluble platinum compounds on a titanium dioxide sol or titanium dioxide pigments followed by drying, calcining, and reduction to platinum metal. The catalysts are particularly useful in preparing addition-curable organopolysiloxane elastomers.

Abstract: The invention relates to a method for producing hydrogen silanes of general formula RnCl3-nSiH by converting chlorosilanes of general formula RnCl4-nSi, where R, in both formulas simultaneously and independently of each other, is a hydrogen atom, an optionally substituted or unsubstituted hydrocarbon radical having 1 to 18 carbon atoms, and n can have the value of 1-3, and hydrogen gas in the presence of a catalytic quantity (K): zinc and/or an alloy comprising zinc on a metal oxide carrier.

Abstract: Ruthenium compounds which have, in their ligand sphere, at least one ?6-bonded arene ligand and a silyl ligand; ruthenium complexes which have, in their ligand sphere, at least one ?6-bonded arene ligand to which is bonded a silyl or siloxy radical directly or via a spacer, and ruthenium complexes which have, in their ligand sphere, at least one ?6-bonded arene ligand and at least one further ligand to which is bonded a silyl or siloxy radical directly or via a spacer are useful as hydrosilylation catalysts.

Abstract: The invention provides alkoxy-crosslinking rubber mixtures (M) which comprise a compound of the general formula (1) M(OR1)n(OSiR23)5-n (1) and polymers with end groups of the general formula (2) —SiR3a(OR4)3-a (2), where M is defined as Nb or Ta, R1, R2; R3 and R4 are each hydrocarbon radicals having 1 to 10 carbon atoms, n is 1, 2, 3 or 4, and a is 0 or 1.

Abstract: Hydrosilylatable compositions employ ruthenium compounds with a ligand sphere comprising at least two independent carbon ?-bonded ligands, at least one of these ligands being selected from the group consisting of ?6-bonded arene ligands, ?6-bonded triene ligands, ?4-bonded 1,5-cyclooctadiene ligands and ?4-bonded 1,3,5-cyclooctatriene ligands as a hydrosilylation catalyst.

Abstract: Nanosize titanium dioxide having supported thereon metallic platinum are efficient hydrosilylation catalysts whose hydrosilylation activity may be increased by irradiation. The catalysts are prepared by depositing soluble platinum compounds on a titanium dioxide sol or titanium dioxide pigments followed by drying, calcining, and reduction to platinum metal. The catalysts are particularly useful in preparing addition-curable organopolysiloxane elastomers.

Abstract: A process for preparing isocyanoatoorganosilanes by thermolysis of carbamatoorganosilanes in the presence of microwave radiation, optionally employing homogeneous or heterogeneous catalysis, provides isocyanatoorganosilane product in higher yield than prior art thermolyses, and with fewer byproducts. A continuous process is thus possible.

Abstract: Ruthenium compounds which have, in their ligand sphere, at least one ?6-bonded arene ligand and a silyl ligand; ruthenium complexes which have, in their ligand sphere, at least one ?6-bonded arene ligand to which is bonded a silyl or siloxy radical directly or via a spacer, and ruthenium complexes which have, in their ligand sphere, at least one ?6-bonded arene ligand and at least one further ligand to which is bonded a silyl or siloxy radical directly or via a spacer are useful as hydrosilylation catalysts.

Abstract: Hydrosilylatable compositions employ ruthenium compounds with a ligand sphere comprising at least two independent carbon ?-bonded ligands, at least one of these ligands being selected from the group consisting of ?6-bonded arene ligands, ?6-bonded triene ligands, ?4-bonded 1,5-cyclooctadiene ligands and ?4-bonded 1,3,5-cyclooctatriene ligands as a hydrosilylation catalyst.

Abstract: A communication interface for a path measuring device is provided. The interface can be coupled between the path measuring device and a control device. A path determination can be carried out by the path measuring device by way of a measurement of the propagation time of measurement signals. A measurement of the propagation time can be triggered by way of control signals on a control signal communication channel. A propagation-time signal communication channel is provided for propagation-time signals. The present invention enables a path measuring device to be used universally and in a simple manner, as the communication interface may be coupled to the control signal communication channel and/or to the propagation-time signal communication channel and digital data may be transmittable between the control device and the path measuring device in addition to control signals for the measurement of the propagation time and propagation-time signals.

Abstract: Isocyanatosilanes are prepared by themolyzing carbamatosilanes in a fluidized bed reactor containing fluidized solid particles. The process substantially avoids the deposition of solid reaction by products in the reactor.

Abstract: Efficient production of trichlorosilane from tetrachlorosilane and hydrogen is effected by reaction at high temperatures over short residence times followed by rapidly cooling the product mixture in a heat exchanger, recovered heat being employed to heat the reactant gases.