| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for refining colloidal silica used as a catalyst carrier, a filler for chromatography, an additive for a coating agent or an abrasive for an electronic material. <P>SOLUTION: The method for refining the colloidal silica comprises a step wherein the colloidal silica is acidified and a step wherein hydroxycarboxylic acid and/or oxycarboxylate is added before a step wherein concentration is performed through ultrafiltration. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
