| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing high-purity urea water, capable of removing all at once, metal ion and occlusion causative material by a comparatively simple method, and suppressing fluctuation of a pH value. <P>SOLUTION: In this method for producing high-purity urea water, urea water undiluted solution is treated by an acidic cation exchange resin, and then treated by a strongly basic anion exchange resin. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
