CAS: 17622-94-5; Tetrakis(2-Hydroxyethyl) Orthosilicate

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tetraethoxy orthosilicate ethylene glycolsilica gel tetraethoxy orthosilicate tetramethylorthosilicate

📜乙二醇置于silica Gel,Sodium Hydroxide体系中,15.0 °C,101.33 Kpa 条件下,反应 24.0H,反应生成四(2-羟基乙基)原硅酸溶液
参考文献:避免碳热还原:从生物,绿色和可持续资源中蒸馏烷氧基硅烷
标题:避免碳热还原:从生物,绿色和可持续资源中蒸馏烷氧基硅烷
摘要:的sio的直接解聚2到蒸馏烷氧基硅烷已经反复探索没有成功85年,以替代碳热还原(1900oc)于si满足,随后用roh治疗.我们在此报告了sio 2与二醇的碱催化解聚反应,形成可蒸馏的螺环烷氧基硅烷和si(oet)4.因此,在naoh存在的情况下,2-甲基-2-4,4-戊二醇,2,2,4-三甲基-1,3-戊二醇或乙二醇(egh 2)与二氧化硅源如稻壳灰反应( 10%)形成h 2 O和可蒸馏的螺环烷氧基硅烷[双(2-甲基-2-2,4-戊二醇)硅酸盐,双(2,2,4-三甲基-1,3-戊二醇)硅酸盐或si(例如)2聚合物具有5-98%的转化率,取决于表面积/结晶度.Si(例如)2或双(2-甲基-2-2,4-戊二醇)硅酸盐与etoh和催化酸反应生成si(oet)4,产率为60%,从而提供了廉价的途径来制备高纯度的沉淀或气相二氧化硅和具有单个si-C键的化合物.
Doi:10.1002/anie.201506838

专利信息

专利号:US-2018282169-A1
优先权日:2015-09-03
标题 :Silica synthesis
发明人：MANNING JOSEPH RICHARD HENRY; PATWARDHAN SIDDHARTH VIJAY
权利人:UNIV SHEFFIELD
摘要:A method for the production of a silica includes (1) reacting a silicic acid solution with an amine, to precipitate the silica from an aqueous solvent system. The method also includes removing at least a portion of the amine associated with the precipitated silica by treating the silica in an aqueous solvent system at a pH that is reduced from that of the reaction mixture (2). The reduction in pH may be by first reducing the pH of the aqueous solvent system, and then removing the silica from the aqueous solvent system. Alternatively the reduction in pH may be removing the silica from the aqueous solvent system first, before treating the silica with an aqueous solvent at a pH below that of the silica forming reaction. Subsequently the silica is removed from the solution (3).

专利号:US-9751899-B2
优先权日:2015-04-15
标 题 :Synthesis method of alkoxysilanes
发明人：LAINE RICHARD M; FURGAL JOSEPH C; POPOVA VERA; YI EONGYU
权利人:LAINE RICHARD M; FURGAL JOSEPH C; POPOVA VERA; YI EONGYU
摘要:The direct depolymerization of biogenic and other high surface area silica sources uses both simple and hindered diols to produce alkoxysilanes in one or two steps that can be separated and purified directly from the reaction mixture by distillation, extraction or filtration followed by solution modification and distillation or extraction. The alkoxysilanes can take the form of spirosiloxanes or simple alkoxysilanes or oligomers thereof. Thereafter they can be treated with acid to produce colloidal or precipitated silica or aerosolized and combusted to provide fumed silica without the intervention of SiCl 4 .

专利号:US-2016304540-A1
优先权日:2015-04-15
标 题:Synthesis method of alkoxysilanes