To provide a method of producing a polyether polyol having less coloration with good selectivity and high efficiency by dehydrocondensing a polyol. In producing a polyether polyol by dehydrocondensation reaction of a polyol, a solid acid catalyst satisfying at least one of the following requirements (1) to (3) is used:
(1) Acid function H
0
measured by Hammett's indicator adsorption method is larger than −3; (2) In Temperature-Programmed Desorption (TPD) analysis of ammonia, desorption amount of ammonia in a region of from 100 to 350° C. is 60% or more of the entire ammonia desorption amount (a region of from 25 to 700° C.); and (3) In thermogravimetry (TG), desorption amount of water is 3% by weight or more of a reference weight in a region of from 32 to 250° C.
提供一种通过脱
水缩醛反应制备聚醚多元醇的方法,该方法具有良好的选择性和高效率,且颜色较浅。在聚醚多元醇的脱
水缩醛反应中,使用至少满足以下要求之一的固体酸催化剂(1)至(3):(1)通过Hammett指示剂吸附法测量的酸性功能H0大于-3;(2)在
氨的温度编程脱附(
TPD)分析中,100到350℃区域内的
氨脱附量占整个
氨脱附量(25到700℃区域)的60%或更多;(3)在热重分析(TG)中,32到250℃区域内的
水脱附量占参考重量的3%或更多。