摘要:
Shaped bodies with good strength properties are prepared from pyrogenic metal oxide(s) by suspending the metal oxide(s) in a liquid, milling to activate the metal oxide particles, forming an activated homogenous suspension, coagulating the suspension, and forming shaped bodies therefrom.
摘要:
Shaped bodies with good strength properties are prepared from pyrogenic metal oxide(s) by suspending the metal oxide(s) in a liquid, milling to activate the metal oxide particles, forming an activated homogenous suspension, coagulating the suspension, and forming shaped bodies therefrom.
摘要:
Especially physically stable metal oxide catalyst supports are prepared by suspending a metal oxide in a continuous phase, activating by fine dispersion, coagulation to a viscoelastic mass, shaping, drying, and calcining. The catalyst support thus prepared may be treated with catalytic agents to produce supported catalysts for olefin oxidation.
摘要:
Especially physically stable metal oxide catalyst supports are prepared by suspending a metal oxide in a continuous phase, activating by fine dispersion, coagulation to a viscoelastic mass, shaping, drying, and calcining. The catalyst support thus prepared may be treated with catalytic agents to produce supported catalysts for olefin oxidation.
摘要:
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.
摘要:
Extremely high solids content silica dispersions are useful for forming green bodies of near net shape as compared to the shape of the bodies after sintering. The green bodies are particularly useful for sintering to form low impurity-containing crucibles for single crystal silicon production.
摘要:
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.
摘要:
Hydrosilylatable compositions employ ruthenium compounds with a ligand sphere comprising at least two independent carbon π-bonded ligands, at least one of these ligands being selected from the group consisting of η6-bonded arene ligands, η6-bonded triene ligands, η4-bonded 1,5-cyclooctadiene ligands and η4-bonded 1,3,5-cyclooctatriene ligands as a hydrosilylation catalyst.
摘要:
Ruthenium compounds which have, in their ligand sphere, at least one η6-bonded arene ligand and a silyl ligand; ruthenium complexes which have, in their ligand sphere, at least one η6-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 η6-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.
摘要:
The invention describes new organosilicon compounds containing alkenyl groups, comprising units of the formula A a R b ( R 1 O ) c SiO 4 - ( a + b + c ) 2 , ( I ) where R are identical or different and are each a monovalent hydrocarbon radical which is free of aliphatic carbon-carbon multiple bonds, has from 1 to 20 carbon atom(s) per radical and may contain from 1 to 4 oxygen atom(s), R1 are identical or different and are each a monovalent hydrocarbon radical which is free of aliphatic carbon-carbon multiple bonds and has from 1 to 8 carbon atom(s) per radical, a is 0 or 1, b is 0, 1, 2 or 3, c is 0, 1, 2 or 3, preferably 0, where the sum a+b+c≦3, A is a radical of the formula —(R2)d—Y(—CH═CHR3)2 where R2 is a divalent hydrocarbon radical which is free of aliphatic carbon-carbon multiple bonds and has from 1 to 6 carbon atom(s), R3 are identical or different and are each a hydrogen atom or are as defined for R, Y is a trivalent hydrocarbon radical which has from 2 to 20 carbon atoms and may contain from 1 to 4 oxygen atom(s) and d is 0 or 1, with the proviso that the organosilicon compounds have at least two units of the formula (I) and at least one radical A per molecule.