Preparation method of bisphenol A polyether polyol

The invention belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of bisphenol A polyether polyol. The preparation method of the bisphenol A polyether polyol comprises the following steps: by adopting bisphenol A as an initiator and solid potassium hydroxide as a catalyst, firstly adding part of epoxypropane to carry out dissolving pre-reaction, then carrying out polymerization reaction with epoxypropane, and after the reaction is finished, refining the obtained polymer to obtain the bisphenol A polyether polyol. When the method provided by the invention is used for industrial production of bisphenol A polyether polyol, the method has the characteristics of high product quality stability, high production efficiency, short production period and no damage to production equipment. By adopting the preparation method provided by the invention, the universal bisphenol A polyether polyol which is regular in molecular structure, narrow in molecular weight distributio