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.
The direct synthesis of organic derivatives of silicon using nonhalogenated organic compounds
Newton,Rochow
, p. 1071 - 1075 (1970)
Some trialkoxysilanes, (RO)3SiH (R = CH3, C2H5, n-C3H7, i-C4H9), and tetraalkoxysilanes were prepared directly by the reactions of the appropriate primary alcohol with a silicon-copper contact mixture. Similar attempts with secondary and tertiary alcohols, ethers, and secondary amines gave no silicon-containing products.
A Kinetic Study on the Copper-catalyzed Reaction of Silicon with Methanol into Trimethoxysilane
Suzuki, Eiichi,Okamoto, Masaki,Ono, Yoshio
, p. 199 - 202 (1991)
The reaction of methanol with silicon was carried out in a fixed-bed reactor at 463-533 K.In order to determine the kinetics of the reaction per reaction site on the silicon surface, a pressure- (or temperature-) transition method was employed.The reaction order with respect to methanol was 1.0 and 1.4 for the Si-CuCl mixture preheated at 513 and 723 K, respectively, indicating that the rate-determining step is not the diffusion of silicon or copper species to the reaction site, but the chemical process involving methanol.Kinetics also indicate that the nature of the reaction sites changes with the preheating conditions of the mixture.
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.
A three-methoxy silane synthesis method (by machine translation)
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Paragraph 0026-0029; 0046; 0047, (2017/08/27)
The invention provides a three-methoxy silane synthesis method, comprises the following steps: step 1, using wet chemical reduction method for preparing nanometer copper, step 2, by a grinding method and the microwave pre-treatment to prepare silica flour - nanometer copper catalyst mixture, step 3, using fixed bed reactor for preparing tri-methoxy silane. The present invention has the characteristic of the fixed bed reactor the production capacity is large, the operation is simple, and is suitable for industrial production. (by machine translation)
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%.
Method for synthesizing trimethoxy silane through fixed bed reaction
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Paragraph 0018-0020; 0023-0024; 0027-0028; 0031-0032, (2017/08/25)
The invention relates to the technical field of trimethoxy silane synthesis, and especially relates to a method for synthesizing trimethoxy silane through a fixed bed reaction. The trimethoxy silane is obtained through a direct reaction of silicon powder and methanol under the action of a copper system catalyst. The method comprises the following steps: preprocessing the silicon powder raw material and the catalyst, mixing and grinding cuprous chloride, surface silica removed silicon powder and copper oxide, screening the obtained ground mixture, carrying out microwave treatment, tabletting the treated silicon powder-catalyst mixture, and sieving the tabletted mixture to obtain a silicon powder-catalyst mixture; and placing the silicon powder-catalyst mixture in a fixed bed reactor, and carrying out a gas phase catalysis reaction on the silicon powder-catalyst mixture and methanol. The method has the advantages of large productivity of the fixed bed reactor, simplicity in operation, and good catalysis activity and stability of the catalyst in the reaction process.
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).
METHOD OF PRODUCING A HYDROLYZABLE SILICON-CONTAINING COMPOUND
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Page/Page column 16-17; 20, (2012/07/14)
The present invention provides a safe, inexpensive, and high yield means of producing a hydrolyzable silicon-containing compound, e.g., an organooxysilane and the like. A compound (A) represented by the general formula R1-O-R2 wherein R1 represents a C4-30, substituted or unsubstituted, tertiary alkyl group or aralkyl group and R2 represents a C1-30, substituted or unsubstituted, monovalent hydrocarbyl group or acyl group, is reacted in the presence of a Lewis acid catalyst with a halosilane (B) represented by the general formula R3mSiX4-m wherein R3 represents the hydrogen atom or a C1-30 substituted or unsubstituted monovalent hydrocarbyl group, X is independently bromine or chlorine, and m represents an integer from 0 to 3.
