Experimental study on the preparation of 4A molecular sieve from secondary aluminum dross

Secondary aluminum dross as a solid waste can cause great harm to environment. However, it contains rich alumina oxide which is an ideal raw material for the preparation of molecular sieve. Therefore, optimal process was explored 4A sieve using secondary source and additional silicon source. The results show that prepared under conditions silicon/aluminum 2.0, crystallization temperature 95 °C time 5 h has clear uniform cubic crystalline structure good calcium ion exchange capacity (389 mg CaCO3/g). It provides new direction high-value resourceful utilization dross.