During the process of purifying polycthcr Polyols,thc hydrated salt and BHT are added, then the operation can be carried out under less than 1% of water content.

• 在聚醚多元醇中和精制过程中,加入无机盐水合物和BHT,使中和过程能在水含量小于1%25条件下进行。