A novel route to tetraethoxysilane and other silicon alkoxides is described,
from amorphous silica
(SiO2.nH2O)
as the raw material. The reaction of amorphous silica with triethanolamine is
enhanced by using an alkali metal hydroxide catalyst, to form a range of
triethanolamine-substituted silatrane species. These can undergo alkoxide
exchange in acidic alcohols to form alkoxysilatranes, tetraalkoxysilanes,
hexaalkoxydisiloxanes and higher siloxanes. Reaction of
triethanolamine-substituted silatranes with acetic anhydride produces
acetoxysilatrane. Products were identified by multinuclear
(1H, 13C and
29Si) magnetic resonance spectroscopy, electrospray mass
spectrometry or high-resolution gas chromatography electron impact mass
spectrometry.
描述了一种获得四乙氧基硅烷和其他硅烷氧基化合物的新方法、
从无定形二氧化硅
(SiO2.nH2O)
为原料。无定形二氧化硅与三乙醇胺的反应
通过使用碱金属氢氧化物催化剂,增强了无定形二氧化硅与三乙醇胺的反应,形成一系列
三乙醇胺取代的硅烷。这些物质可在酸性醇中进行
交换,形成烷氧基硅烷、四烷氧基硅烷、
六烷氧基二硅氧烷和高级硅氧烷。反应
三乙醇胺取代的硅烷与乙酸酐反应生成
乙酰氧基硅烷。通过多核
(1H、13C 和
29Si)磁共振光谱法、电喷雾质谱法或高分辨
质谱法或高分辨率气相色谱电子碰撞质谱法鉴定。
质谱法进行鉴定。