| 摘要 |
PURPOSE: A preparation method of basic aluminum magnesium hydroxycarbonate is provided which uses aluminum hydroxide gel and magnesium hydroxide gel instead of water-soluble salts or water-insoluble hydroxide as an aluminum and magnesium source and ammonium carbonate or ammonium bicarbonate as a carbon source. CONSTITUTION: Basic aluminum magnesium hydroxycarbonate of formula I is prepared by diluting aluminum hydroxide gel in water and reacting with one or more compounds selected from ammonium carbonate or ammonium bicarbonate at 80-100°C. The formula I is Al2Mg6(OH)2.4H2O. The method uses aluminum hydroxide gel and magnesium hydroxide gel as an aluminum such that the reaction is advanced with a high reactivity without impurities and ammonium carbonate or ammonium bicarbonate as a carbon source such that it is unnecessary to use an excess amount of carbon dioxide and thereby the reaction is accelerated much more. |
