5089-70-3Relevant articles and documents
Sustainable Catalytic Synthesis of Diethyl Carbonate
Putro, Wahyu S.,Ikeda, Akira,Shigeyasu, Shinji,Hamura, Satoshi,Matsumoto, Seiji,Lee, Vladimir Ya.,Choi, Jun-Chul,Fukaya, Norihisa
, p. 842 - 846 (2020/12/07)
New sustainable approaches should be developed to overcome equilibrium limitation of dialkyl carbonate synthesis from CO2 and alcohols. Using tetraethyl orthosilicate (TEOS) and CO2 with Zr catalysts, we report the first example of sustainable catalytic synthesis of diethyl carbonate (DEC). The disiloxane byproduct can be reverted to TEOS. Under the same conditions, DEC can be synthesized using a wide range of alkoxysilane substrates by investigating the effects of the number of ethoxy substituent in alkoxysilane substrates, alkyl chain, and unsaturated moiety on the fundamental property of this reaction. Mechanistic insights obtained by kinetic studies, labeling experiments, and spectroscopic investigations reveal that DEC is generated via nucleophilic ethoxylation of a CO2-inserted Zr catalyst and catalyst regeneration by TEOS. The unprecedented transformation offers a new approach toward a cleaner route for DEC synthesis using recyclable alkoxysilane.
Synthetic process of silicon-based imidazole epoxy resin curing agent
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Paragraph 0022, (2017/07/21)
The invention discloses a synthetic process of a silicon-based imidazole epoxy resin curing agent and belongs to the technical field of synthesis of curing agents. The synthetic process comprises the following steps: taking chloropropyl trichlorosilane and alcohol as raw materials, synthesizing chloropropyl siloxane by adopting a continuous method and then conducting reaction with an imidazole substance to obtain the silicon-based imidazole epoxy resin curing agent. The synthetic process of the silicon-based imidazole epoxy resin curing agent, disclosed by the invention, has the benefits that some raw materials used in the production process are simple and easy to obtain; in the whole production process, conditions are milder, the operation is simple, the equipment requirements are low, and high temperature, high pressure and other special processes are not required, so that the safety and the economy are good; wastewater containing COD is not generated, and byproducts are less; in the first step of esterification, no waste is generated, by-product hydrochloric acid is also a product with economic benefits, and the influence on the environment is less; chloropropyl silane is continuously produced, so that the reaction is favorably promoted, and the by-products are reduced.
Hydrosilylation Synthesis of Haloalkylorganosilanes Using Peroxide Promoters
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Paragraph 0123-0124, (2014/05/07)
This invention is directed to a process for producing a haloorganoalkoxysilane product comprising reacting an olefinic halide, an alkoxysilane, a catalytically effective amount of ruthenium-containing catalyst; and a reaction-promoting effective amount of a peroxy compound, optionally in the presence of an electron-deficient aromatic compound.
