| 摘要 |
<p>Provided is a method for producing hydrotalcite that has a low zirconia content and that, when mixed into a resin such as polyvinyl chloride, gives improved transparency to the resin. The method of the present invention is a method for producing hydrotalcite from materials of an aluminum compound and a magnesium compound and/or a zinc compound, the method including: a slurry preparation step of preparing a slurry that contains at least one material selected from the group consisting of hydroxides, oxides, and carbonates of aluminum, magnesium, or zinc; a wet grinding step of subjecting the slurry to wet grinding with zirconia beads or zirconia silica beads under the predetermined conditions; and a hydrothermal treatment step of adding the rest of the materials to the slurry and hydrothermally treating the resulting slurry to synthesize hydrotalcite having a BET value and a Zr content that are in the respective predetermined ranges.</p> |
