681-84-5Relevant academic research and scientific papers
Direct Transformation of Silica into Alkoxysilanes by Gas-Solid Reactions
Suzuki, Eiichi,Akiyama, Masanari,Ono, Yoshio
, p. 136 - 137 (1992)
Silica gel is conveniently and efficiently converted into tetramethoxysilane by treatment with gaseous dimethyl carbonate at 500-600 K in the presence of an alkali hydroxide catalyst supported on the reacting silica.
The study of an alcoholysis reaction of silicon tetrafluoride with alcohols and magnesium to prepare tetraalkoxysilanes and magnesium fluoride
Zhang, Zongfan,Huang, Zhong,Tian, Qiang,Li, Yuye,Li, Xia,Liang, Xuesong,Du, Lusha
, p. 567 - 573 (2015)
An efficient alcoholysis reaction of silicon tetrafluoride with alcohols in the presence of magnesium can directly prepare tetraalkoxysilane and magnesium fluoride. The reaction can afford tetraethoxysilane, tetramethoxysilane, and magnesium fluoride in good yields with the aid of a catalytic amount of iodine.
New direct transformation reaction of SiF4 with methanol and aluminum with the aid of iodine to prepare tetramethoxysilane and aluminum fluoride
Huang, Zhong,Li, Yuye,Tian, Qiang,Zhang, Zongfan,Li, Xia,Liang, Xuesong,Du, Lusha
, p. 6 - 10 (2014)
A new alcoholysis reaction of silicon tetrafluoride with methanol in the presence of aluminum can directly afford tetramethoxysilane and aluminum fluoride. The reaction conditions were investigated in detail to find that the catalytic amount of iodine was effective for the transformation.
Mechanochemistry-a new powerful green approach to the direct synthesis of alkoxysilanes
Temnikov, Maxim N.,Anisimov, Anton A.,Zhemchugov, Pavel V.,Kholodkov, Dmitry N.,Goloveshkin, Alexander S.,Naumkin, Alexander V.,Chistovalov, Sergey M.,Katsoulis, Dimitris,Muzafarov, Aziz M.
, p. 1962 - 1969 (2018)
The present work shows a new one-stage mechanochemical method for the direct synthesis of alkoxysilanes by silicon mechanoactivation followed by a reaction with an alcohol. Alkoxysilanes were obtained with nearly complete silicon and alcohol conversion. This method allows for a considerable simplification of the traditional multistage process by eliminating three stages that include silicon and catalyst preparation, and adapts it to green chemistry requirements. Vibration milling removed the oxide film, and the mechanoactivation of the large silicon fraction (1000-2000 μm) occurs in the reactor working space. Abrasion of the reactor walls and grinding bodies made of brass results in a developed catalytic surface on silicon, as it has been proven by a set of physical analytical methods such as scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), powder X-ray diffraction (PXRD), and X-ray photoelectron spectroscopy (XPS).
Reactivity of heterocyclic α-aminomethylsilanes with alcohols
Pypowski, Krzysztof,Mojzych, Mariusz
, p. 320 - 324 (2021/03/31)
[Figure not available: see fulltext.] Alkoxylation of N-substituted heterocyclic aminomethylsilyl moieties was studied using primary and tertiary alcohols. The reaction of 4-(silylmethyl)morpholine and 1-(silylmethyl)azepane under catalyst- and solvent-free conditions leads to the formation of dialkoxy- and trialkoxyaminomethylsilyl derivatives. The methanolysis of 4-(silylmethyl)morpholine resulted in trimethoxyaminomethylsilane formation as the main product and two byproducts, i.e., tetramethoxysilane and N-methylmorpholine.
Method for preparing organosilane by utilizing organosilicone byproduct
-
Paragraph 0024, (2020/07/13)
The invention relates to the technical field of production of organic silicon by-products. The invention aims to solve the problems of high cost, more three wastes and continuous production of byproducts in the traditional organic silicon byproduct treatment process. The method comprises the following steps: adding the organic silicon by-product into a nitrogen-protected glass lining reaction kettle with a tower, adding a catalyst, dropwise adding alcohol to the bottom of the glass lining reaction kettle, carrying out a heating reaction under a stirring condition, neutralizing the obtained material, and rectifying the neutralized material to obtain the organic silane. According to the method, the multi-component organic silicon by-products trichlorosilane and silicon tetrachloride react and are converted into the same product, the high-purity product can be obtained only through simple rectification and purification, the process is simple, the treatment cost is low, and the product hasgood economic value.
METHOD FOR PRODUCING TETRAALKOXYSILANE
-
Paragraph 0055; 0067; 0073, (2020/12/01)
An object of the present invention is to provide a method capable of producing a tetraalkoxysilane with a high energy efficiency and with a high yield. The present invention provides a method for producing a tetraalkoxysilane, the method including: a first step of reacting an alcohol with a silicon oxide; and a second step of bringing a vaporized component of the reaction mixture obtained in the first step into contact with a molecular sieve.
Direct transformation of silica from natural resources to form tetramethoxysilane
Putro, Wahyu S.,Fukaya, Keisuke,Choi, Jun-Chul,Choi, Seong Jib,Horikoshi, Toshio,Sato, Kazuhiko,Fukaya, Norihisa
, p. 958 - 962 (2020/09/04)
A simple and practical method for direct synthesis of tetramethoxysilane (TMOS) from silica (SiO2) and methanol was achieved using a base catalyst and acetal as a dehydrant under carbon dioxide (CO2). The production of TMOS was strongly influenced by the kind of the acetal used, with 2,2-dimeth-oxypropane identified as the most effective dehydrant. We observed that the acetal used enabled the production of a high yield of dimethyl carbonate (DMC), which promoted the TMOS production. DMC is an intermediate product from the reaction of CO2 and methanol, which supported the SiO2 depolymerization process. When the reaction is conducted with 2,2-dimethoxypropane at 260 °C for 24 h, TMOS can be produced in up to 59percent yield. For practical applications, the TMOS synthesis has been developed on a 250 mL and 1 L-scale reaction with constant yield (>50percent) from various silica resources.
A catalyst- And additive-free synthesis of alkoxyhydrosiloxanes from silanols and alkoxyhydrosilanes
Fuchise, Keita,Igarashi, Masayasu,Nozawa, Takeshi,Sato, Kazuhiko,Satoh, Yasushi
supporting information, p. 8218 - 8221 (2020/08/17)
A convenient method for the selective synthesis of alkoxyhydrosiloxanes that bear SiH and SiOR2 groups on the same silicon atom, R13Si-O-SiR32-n(OR2)nH (n = 0, 1, or 2), via a simple catalyst- and additive-free dealcoholization reaction between silanols and alkoxyhydrosilanes has been developed. These alkoxyhydrosiloxanes can be easily converted into Si(OR2)3-containing siloxanes by zinc catalyzed alkoxylation and alkoxy-containing silphenylene polymers by platinum catalyzed hydrosilylation. This journal is
METHOD FOR PREPARING ALKYLALKOXYSILANES
-
Paragraph 0038, (2020/03/29)
A method is useful for preparing alkylalkoxysilanes, such as alkylalkoxysilanes, particularly dimethyldimethoxysilane. The method includes heating at a temperature of 150°C to 400°C, ingredients including an alkyl ether and carbon dioxide, and a source of silicon and catalyst. The carbon dioxide eliminates the need to add halogenated compounds during the method.
