Method for preparing 1,1,3,3-tetramethyldisiloxane

The invention relates to a preparation method of high-purity 1,1,3,3-tetramethyldisiloxane. According to the method, an organochlorosilane low-boiling-point substance with a boiling point of less than40 DEG C and an alcohol compound are used as raw materials. The method comprises the following steps: feeding the low-boiling-point substance and the alcohol compound according to a specific ratio, carrying out alcoholysis, hydrolysis and standing successively, then removing acid water, sequentially carrying out filtering and drying, rectifying a hydrolysate obtained after filtering, and extracting a tower-top distillate with a temperature of 70-71 DEG C to obtain the product 1,1,3,3-tetramethyldisiloxane with a purity of more than or equal to 98.5%. The 1,1,3,3-tetramethyldisiloxane is applicable as a production raw material for addition type silicone rubber, silica gel, methyl hydrogen silicone oil (with more than 3 SiH bonds) and other special additives. 本发明涉及一种高纯度1,1,3,3-四甲基二硅氧烷的制备方法。该方法采用沸点小于40℃的有机氯硅烷低沸物和醇类化