METHOD FOR PURIFYING SODIUM ALUMINATE SOLUTION, AND METHOD FOR MANUFACTURING ALUMINUM HYDROXIDE

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a sodium aluminate solution containing little discoloring substance in the matter in a way less in the loss of aluminum hydroxide.;SOLUTION: Potassium hydroxide and calcium carbonate are added to a sodium aluminate solution, stirred preferably at ≥90°C and lower than the boiling point, and then filtered. Aluminum hydroxide with a high whiteness degree is obtained from the purified sodium aluminate solution.;COPYRIGHT: (C)2004,JPO&NCIPI