| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an industrially advantageous method for producing high-quality polyalkylene ether glycol with an excellent hue. <P>SOLUTION: In the method for producing polyalkylene ether glycol, when the polyalkylene ether glycol is produced by ring-opening polymerization of a cyclic ether carried out in the presence of a carboxylic acid anhydride and a catalyst, absorbance in measurement of the carboxylic acid anhydride at one wavelength selected from measurement wavelength 300-330 nm based on a UV spectrum is ≤0.10. <P>COPYRIGHT: (C)2012,JPO&INPIT |
