- The hydrosilylation of propylene
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The reactions of separate and competitive hydrosilylation of propylene with HSiCl3, MeSiHCl2, Me2SiHCl, and MePh2SiH in the presence of the Speier catalyst (SC) with different additives and a catalyst obtained from SC and propylene were studied. A mutual influence of the hydrosilanes in the competitive reactions was found. The influence of various additives to SC on the process was considered.
- Chernyshev,Belyakova,Yagodina,Nikitinskii,Bykovchenko
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- Method for preparing propyl trichlorosilane by using tail gas propylene in chloropropyl chlorosilane production process
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The invention relates to a method for preparing propyl trichlorosilane by using tail gas propylene in a chloropropyl chlorosilane production process, and belongs to the technical field of fine chemical engineering. According to the method, by-product tail gas propylene generated in the production process of chloropropyl chlorosilane is used as a raw material and is subjected to an addition reaction with trichlorosilane under stirring, and distillation is performed to obtain a propyltrichlorosilane product. As a silane intermediate, propyl trichlorosilane can be used as a cross-linking agent, a coupling agent, a building waterproofing agent, a powder treating agent and many other material industries of RTV silicone rubber after hydrolysis, alcoholysis and acylation. The method has the advantages of simple equipment process and byproduct raw materials, not only creates huge economic benefits, but also solves the problems of safety, environmental protection and occupational health of tail gas propylene in the production process of chloropropyl chlorosilane, and is suitable for industrial production.
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Paragraph 0021-0031
(2021/07/10)
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- METHOD FOR THE DEHYDROGENATION OF DICHLOROSILANE
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Dichlorosilane and trichlorosilane are dehydrogenated at elevated temperature in the presence of an ammonium or phosphonium salt as a catalyst, and a halogenated hydrocarbon or hydrogen halide. The method may be used to synthesize organochlorosilane.
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Paragraph 0092; 0097
(2021/06/22)
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- Method for producing chloropropyltrichlorosilane
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The invention provides an industrial production method of trichloro(3-chloropropyl)silane. A trichloro(3-chloropropyl)silane addition reaction coarse product is used as reaction substrates; the raw material reactants of chloropropene and trichlorosilane a
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Paragraph 0050-0052
(2020/03/14)
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- PREPARATION OF ORGANOHALOSILANES
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A process for preparing organohalosilanes comprising combining hydrogen, a halosilane having the formula HaSiX4-a (I), and an organohalide having the formula RX (II), wherein R is C1-C10 alkyl or C4-C10 cycloalkyl, each X is independently halo, and the subscript a is 0, 1, or 2, in the presence of a sufficient amount of a catalyst effective in enabling the replacement of one or more of the halo groups of the halosilane with the R group from the organohalide, at a temperature from 200 to 800 °C, to form an organohalosilane and a hydrogen halide, wherein the volumetric ratio of hydrogen to halosilane is from 1 :3 to 1 :0.001 and the volumetric ratio of hydrogen to organohalide is from 1 : 1 to 1 :0.001, and wherein the catalyst is optionally treated with the hydrogen or the halosilane prior to the combining.
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Page/Page column 17
(2011/12/14)
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- Liquid-liquid biphasic, platinum-catalyzed hydrosilylation of allyl chloride with trichlorosilane using an ionic liquid catalyst phase in a continuous loop reactor
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The platinum-catalyzed hydrosilylation of allyl chloride with trichlorosilane was investigated in an ionic liquid-organic biphasic reaction mode. After an ionic liquid screening and repetitive batch mode experiments, the process was realized in a continuous mode using a loop reactor concept with integrated continuous separation and recycling of the ionic liquid catalyst phase. The continuous reactor could be operated for 48 h at constant activity and selectivity without addition of platinum indicating that platinum leaching into the product phase was far below 1 ppm. Enhanced selectivity for the product trichloro(3-chloropropyl)silane (compared to the state-of-the art) and the possibility to use simple platinum tetrachloride (PtCl4) as platinum source are further attractive features of this new ionic liquid-based process concept.
- Hofmann, Norbert,Bauer, Andreas,Frey, Thomas,Auer, Marco,Stanjek, Volker,Schulz, Peter S.,Taccardi, Nicola,Wasserscheid, Peter
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experimental part
p. 2599 - 2609
(2009/09/07)
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- Continuous Preparation of Organosilanes
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The invention relates to a process for the continuous preparation of organosilanes in a reactive distillation column, wherein a homogenous hydrosilylation catalyst is introduced into the column.
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Page/Page column 4-5
(2008/06/13)
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- Continuous hydrosilylation process
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Continuous hydrosilylation of compounds (A) bearing C—C multiple bonds by means of silicon compounds (B) having Si—H groups, in which the reaction components (A) and (B) are reacted continuously in an integrated loop-tube reactor, with reaction mixture being conveyed from the tube into the loop and back again so that a section of the tube is part of the loop circuit, provides a highly controllable reaction process with high product yields.
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Page/Page column 4-5
(2008/06/13)
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- Hydrosilylation of cyclohexene and allyl chloride with trichloro-, dichloro(methyl)-, and chlorodimethylsilanes in the presence of Pt(0) complexes
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Hydrosilylation of cyclohexene and allyl chloride in the presence of Pt(0) complexes with tetramethyldivinyldisiloxane (Karstedt catalyst) and hexavinyldisiloxane was studied. It was shown that these catalysts are much more active in the hydrosilylation of cyclohexene with trichloro-, dichloro(methyl)-, and chlorodimethylsilane than the Pt(II)-containing Speier catalyst. In the hydrosilylation of allyl chloride in the presence of Pt(0) complexes, the ratio of the fraction of addition products to the fraction of reduction products increases from 5.7 (Speier catalyst) to 10-16. Quantum-chemical calculations showed that Pt(0) complexes are more active than Pt(II) complexes on the stage of formation of platinum silicon hydride complexes. Pleiades Publishing, Inc., 2006.
- Belyakova,Chernyshev,Storozhenko,Knyazev,Turkel'taub,Parshina,Kisin
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p. 925 - 930
(2008/02/03)
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- A novel catalyst containing a platinum complex in polyethylene glycol medium supported on silica gel for vapor-phase hydrosilylation of acetylene with trichlorosilane or trimethoxysilane
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Hydrosilylation of acetylene with trichlorosilane or trimethoxysilane was carried out using a vapor-phase flow reactor with use of tetraammineplatinum(II) chloride in polyethylene glycol medium supported on silica gel as a catalyst, which is an active and thermally stable supported liquid-phase catalyst prepared readily from easily available materials, tetraammineplatinum(II) chloride, polyethylene glycol and silica gel.
- Okamoto, Masaki,Kiya, Hironari,Yamashita, Hiromi,Suzuki, Eiichi
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p. 1634 - 1635
(2007/10/03)
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- The synthesis of -substituted dialkyldichlorosilanes and their conversion into polysiloxanes
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Attack of the oxyl (CF3)2NO. (1) on an ethyl group of the silane Et2SiCl2 occurs at both the α- and β-positions relative to silicon (ratio 31:45), whereas with the silane PrnSiMeCl2 attack takes place at the β-position of the propyl group.With the disilane Me3SiCH2SiMe3, the mojor silicon-containing products formed from treatment with oxyl 1 are Me3SiF, (CF3)2NOSiMe3 and Me3SiSiMe3.Speier-catalysed (H2PtCl6) addition of the silane HSiCl2X (X = Me and Cl) to the alkene (CF3)2NOCH2CH=CH2 gives the adducts (CF3)2NOCH2CH2CH2SiCl2X (29, X = Me) and (28, X = Cl)in high yield.The substituted dichlorosilanes (CF3)2NOCH2CH2SiEtCl2 (9), (CF3)2NOCHMeCH2SiMeCl2 (14) and (CF3)2NOCH2CH2CH2SiMeCl2 (29) are converted into corresponding polysiloxanes ("prepolymers" of low molecular weight) by reaction with reagents including water, acid, base and metal oxides; equilibration of the polysiloxane "prepolymer" 38, derived from dichlorosilane 29 by heating with powdered KOH, affords a solid rubbery polysiloxane.
- Ducker, Graham E.,Tipping, Anthony E.
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p. 253 - 262
(2007/10/02)
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- An efficient Synthesis of Alkylchlorosilanes from Alkenylchlorosilanes
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The use of nickel catalyst ("Ni/SiH") allows easy hydrogenation of alkenylchlorosilanes at atmospheric pressure, not affecting the chlorine function, and leads to quantitative synthesis of alkylchlorosilanes.
- Picard, Jean-Paul,Dunogues, Jacques,Elyusufi, Abdelaziz,Lefort, Marcel
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- SILAETHENE I. DARSTELLUNG UND CHARAKTERISIERUNG VON MONOSILACYCLOBUTANEN
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Monosilacyclobutanes of the type RR' are prepared by ring closure reactions of 3-halopropylhalosilanes and by substitution of SiCl containing silacyclobutane rings with organometallic reagents (RMgX, LiR, NaCp).Under optimal experimental conditions yields between 50 and 95percent can be obtained by both procedures.Characterization of the compounds is accomplished by analytical (C, H, N) and NMR, IR and mass spectroscopic investigations.
- Auner, N.,Grobe, J.
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