| 摘要 |
PURPOSE:To obtain the titled compound in high yield with a distillation reactor of small number of stages and a simple reactor, by reacting SiCl4 with a large amount of alcohol in a liquid phase, separating a by-product hydrogen chloride gas and charging a liquid phase product into the tip of the reactor and introducing the alcohol into the bottom of the reactor. CONSTITUTION:SiCl4 is reacted with m (m<=3.5) mol (based on 1mol SiCl4) alcohol expressed by the formula ROH (R represents lower alkyl) (preferably methanol or ethanol), preferably at 2.7-3.2 molar ratio (ROH/SiCl4), in a liquid phase, preferably at 0-30 deg.C and 1-10atm for 10-60min. Then after separating a by-product hydrogen chloride gas, the above-mentioned liquid phase product is introduced into the reactor from the top and at least (4-m)mol, based on 1mol raw material SiCl4, ROH is charged from the bottom to obtain a tetraalkoxysilane from the bottom.
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