摘要:
The application relates to a method for preparing organohalosilanes in a two-step process: Steps (i) contacting a copper catalyst with hydrogen gas and halogenated silanes forming a silicon-containing copper catalyst; and Step (ii) contacting said silicon-containing copper catalyst with an organohalide to form the organohalosilane.
摘要:
Organosilicon compounds are prepared by the addition reaction of a gaseous unsaturated hydrocarbon with a silane or siloxane containing at least one silicon-bonded hydrogen atom in the presence of a hydrosilylation catalyst in a liquid reaction medium. In this process the unsaturated hydrocarbon and optionally the silane or siloxane is dispersed into the liquid reaction medium by a jet eductor (also known as a venturi pump) device and the resultant gas-in-liquid dispersion is introduced into a bubble reactor.
摘要:
In the process of preparing compounds containing silicon-carbon bonds by the hydrosilation reaction of a hydridosilane reactant with an olefinic reactant, the improvement which comprises operating the process in the presence of a a platinum catalyst and a reaction promoter comprising a carboxylic acid, with the proviso that the carboxylic acid has a molecular weight higher than 60 or a boiling point higher than 118 °C at atmospheric pressure.
摘要:
The invention relates to platinum catalysts that are supported on nanoscale titanium dioxide (Pt/TiO2 catalysts). The invention also relates to the use of said catalysts in hydrosilylation, to a hydrosilylation method using said catalysts and to compositions comprising said catalysts.
摘要:
The invention provides a process for hydrosilylating H-silanes and linear, cyclic or branched H-siloxanes with compounds containing carbon-carbon double or carbon-carbon triple bonds with noble metal catalysis, characterized in that, to improve the catalytic activity, the water content of the reaction mixture is a maximum of 1000 ppm and the catalyst is added to the reaction mixture in liquid form.
摘要:
The present invention relates to a process comprising the steps of reacting in the presence of a hydrosilylation catalyst, a first reaction mixture comprising a free radical reactive compound and a silicon containing compound to form a silicon substituted glyceryl (meth)acrylate.
摘要:
Gegenstand der Erfindung ist ein Verfahren zur kontinuierlichen Hydrosilylierung von C-C-Mehrfachbindungen tragenden Verbindungen (A) mit Si-H Gruppen aufweisenden Siliciumverbindung (B) bei dem die Reaktionskomponenten (A) und (B) in einem integrierten Loop-Rohrreaktor kontinuierlich umgesetzt werden, wobei Reaktionsgemisch aus dem Rohr in den Loop und wieder zurück geleitet wird, so dass ein Rohrabschnitt Teil des Loop-Umlaufes ist.
摘要:
La présente invention concerne un procédé de préparation de composés organosiliciques contenant du soufre de formule générale :
par réaction de sulfuration, à l'aide d'un polysulfure de métal alcalin, d'un oméga-halogénoalkyl dialkylalcoxysilane, lui-même obtenu par réaction d'alcoolyse consistant à mettre en contact dans un réacteur à contre-courant, tel que notamment dans une colonne à plateaux ou à garnissage, un alcanol sur un oméga-halogénoalkyl dialkylhalogénosilane.
摘要翻译:在不存在碱的情况下通过与ω-卤代烷基二烷基烷氧基硅烷与链烷醇逆流的连续反应获得有机二烷基烷氧基硅烷的方法。 获得式(IX)有机二烷基烷氧基硅烷的方法; R 1> O-(R 2> R 3)Si-(CH 2)3-A; - 包括与醇(VIII)R 1> OH与式(VII)的硅烷:Hal-(R 2> R 3))Si-(CH 2)3-A反应,以实现 通过反应进行醇解: - Hal-(R 2> R 3)Si-(CH 2)3 -A + R 1> OH --------------- R 1> O- (R 2> R 3))Si-(CH 2)3-A + H-Hal - 在产物H-Hal的汽提下操作,并在反应器中回收有机二烷基烷氧基 - 硅烷,其中Hal:Cl ,Br或I(优选Cl); R 1> 1〜15 C烷基或2〜8烷氧基烷基; R 2>,R 3> 1〜6C烷基或苯基; A:Hal的可分离基团,基团对R 0> -C 6 H 4 -SO 2 -O-或R 0 -SO 2 -O-(优选甲苯磺酸酯或甲磺酸酯)或R 0> -CO-O- (R 0 = C 1-4烷基)。 A优选为Cl。 还包括制备硅烷(VII)和衍生自二烷基烷氧基硅烷的多硫化物的独立权利要求。
摘要:
The invention relates to a method of preparing a halogenoalkyldialkylchlorosilane having formula (I): Hal-------(R2R3)Si---(CH2)s---Hal by hydrogen silylation reaction of a reaction medium comprising a silane having formula (II): Hal---(R2R3)Si-H and an alkene halide having formula (III): CH=CH-(CH2)s_2Hal, in the presence a catalytically-effective amount of a hydrogen silylation catalyst based on a platinum group metal. The inventive method is characterised in that, at the end of the hydrogen silylation reaction, the product formed having formula (I) and the platinum group catalytic metal are recovered. According to the invention, the catalytic metal recovery method is performed under the following conditions: a) the catalytic metal is recovered (1) directly from the reaction medium at the end of the reaction or (2) from the liquid distillation residue comprising the by-products and the platinum group metal, residue obtained after distillation of the reaction medium in order to separate the product having formula (I); b) the catalytic metal is recovered by bringing the reaction medium or the distillation residue into contact with an effective amount of a solid substance that absorbs the platinum group metal; and c) the adsorbent and the platinum group metal are separated so that said metal can be recovered. The invention can be used for the synthesis of 3-chloropropyldimethylchlorosilane with the recovery of the iridium-based catalyst.