2487-90-3Relevant articles and documents
Direct Synthesis of Trimethoxysilane from Methanol and Hydrogen-Treated Silicon Using Copper(II) Chloride as a Catalyst
Suzuki, Eiichi,Kamata, Takatsugu,Ono, Yoshio
, p. 3445 - 3447 (1991)
When silicon, on which copper(II) chloride was supported, was pretreated under a hydrogen stream at 533 K and brought in contact with methanol at 533 K, trimethoxysilane was formed with an 89percent selectivity and a complete silicon conversion in 5.5 h.Pits were formed on the silicon surface, and grew with increasing silicon conversion.
Newton,Rochow
, p. 133,134 (1970)
Hydrosilylation of ethylene
Chernyshev,Belyakova,Knyazev,Turkel'taub,Parshina,Serova,Storozhenko
, p. 225 - 228 (2006)
Hydrosilylation of ethylene with trialkoxysilanes in the presence of Pt(0) complexes as catalysts affords ethyltrialkoxysilanes in almost quantitative yields. No impurities of vinyltrialkoxysilanes were detected. Experiments and ab initio calculations showed that the Pt(0) catalysts are considerably more active in ethylene hydrosilylation than Pt(II) catalysts. Pleiades Publishing, Inc., 2006.
Direct reaction between silicon and methanol over Cu-based catalysts: Investigation of active species and regeneration of CuCl catalyst
Wang, Aili,Zhang, Mingming,Yin, Hengbo,Liu, Shuxin,Liu, Mengke,Hu, Tongjie
, p. 19317 - 19325 (2018/05/31)
When a CuCl/Si mixture was pretreated at 200-240 °C in a N2 atmosphere, trimethoxysilane was predominantly formed in the direct reaction of silicon with methanol. When the pretreatment temperatures were raised to 260-340 °C, tetramethoxysilane was favorably formed. The CuxSiyClz species catalyzed the reaction between silicon and methanol to trimethoxysilane. Chlorination of the spent CuCl/Si mixture promoted the reaction between silicon and methanol to form both trimethoxysilane and tetramethoxysilane due to the recovery of the CuCl phase and the exposure of the metallic Cu0 phase. When Cu2O, CuO, and Cu0 were used as the catalysts, tetramethoxysilane was formed as the main product.
New vinyl alkoxy silane preparation process
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Paragraph 0037; 0038, (2016/10/08)
The present invention discloses a new vinyl alkoxy silane preparation process, which is characterized in that hydrogen chloride produced during a preparation process is adopted as a reactant to synthesize an initial raw material trichlorosilane, the hydrogen chloride is recycled, and the byproduct bis(trialkoxy)silyl ethane is adopted as a reaction solvent during a hydrogen silicon addition process, such that the byproduct emission is reduced, the new impurity introduction is avoided, and the product purity is improved. According to the present invention, the new process has characteristics of stable production, simple preparation process, and mild reaction conditions, and the yield of the product vinyl alkoxy silane is high, and the product purity is more than 99%.
Amorphous silicon: New insights into an old material
Spomer, Natalie,Holl, Sven,Zherlitsyna, Larissa,Maysamy, Fariba,Frost, Andreas,Auner, Norbert
supporting information, p. 5600 - 5616 (2015/03/30)
Amorphous silicon is synthesized by treating the tetrahalosilanes SiX4 (X=Cl, F) with molten sodium in high boiling polar and non-polar solvents such as diglyme or nonane to give a brown or a black solid showing different reactivities towards suitable reagents. With regards to their technical relevance, their stability towards oxygen, air, moisture, chlorine-containing reaction partners RCl (R=H, Cl, Me) and alcohols is investigated. In particular, reactions with methanol are a versatile tool to deliver important products. Besides tetramethoxysilane formation, methanolysis of silicon releases hydrogen gas under ambient conditions and is thus suitable for a decentralized hydrogen production; competitive insertion into the MeO-H versus the Me-OH bond either yields H- and/or methyl-substituted methoxy functional silanes. Moreover, compounds, such as MenSi(OMe)4-n (n=0-3) are simply accessible in more than 75% yield from thermolysis of, for example, tetramethoxysilane over molten sodium. Based on our systematic investigations we identified reaction conditions to produce the methoxysilanes MenSi(OMe)4-n in excellent (n=0:100%) to acceptable yields (n=1:51%; n=2:27%); the yield of HSi(OMe)3 is about 85%. Thus, the methoxysilanes formed might possibly open the door for future routes to silicon-based products. Amorphous silicon is easily synthesized from tetrahalosilanes SiX4 (X=Cl, F) and molten sodium in different solvents. Reactivity studies prove the resulting materials as versatile tools for the formation of technical important silanes, such as the silicon chloro-, alkoxy-, and methylalkoxy-substituted derivatives (see figure; bl=black, br=brown).
