METHOD OF PRODUCING DECOLORED SODIUM ALUMINATE SOLUTION

摘要

PURPOSE: A method for making decolored sodium aluminate by adding ozon-containing gas to sodium aluminate solution is provided. CONSTITUTION: A method for making decolored sodium aluminate solution comprises: a step of heating slurry over 130°C and isolating solid powder. The slurry contains: solid magnesium oxide and sodium aluminate; solid magnesium oxide, solid aluminium hydroxide and sodium aluminate of low concentration; or solid magnesium, solid aluminum hydroxide, and sodium hydroxide aluminate solution.