Sodium aluminate → Aluminum Sulfate

Participants

Reaction Conditions

Reaction Steps

700 parts of liquid Alum (28% Al2 (SO4)3) was added to a jacketed 1 L. flask. The mixture was cooled to 15° C. and under high shear mixing, 129 parts liquid sodium aluminate (24.0% Al2O3) contained in 157 parts of additional water were slowly added over one half hour. The aluminum hydroxide gel mixture was held at 10°-15° C. for one half hour at which time the temperature was slowly increased to 65° C. over two hours. It was held for one and a half hour at 65° C. until the mixture became clear and was then cooled. The product obtained contained 9.2% Al2O3 (a partial increase over theoretical due to evaporation loss) and had basicity of 50%.

Provenance & Evidence