OPTIMIZATION OF 4A ZEOLITE SYNTHESIS AS RECOVERY OF WASTES FROM ALUMINUM FINISHING

Abstract

A model representing the synthesis process of 4A zeolite from wastes of aluminum finishing plants was obtained and validated through statistical tests. From this model, the optimum values for the molar ratios SiO₂/Al₂O₃, Na₂O/SiO₂ and H₂O/Na₂O, which define the type and quality of the synthesized zeolite, were estimated for the use of these wastes as raw material. The obtained zeolites could be used as water softeners in the formulation of detergents. The resulting liquors could be reused in the cleaning of the extrusion matrices used for aluminum profiles or recycled for new zeolites synthesis.

Keywords:

• 4A zeolite
• Synthesis
• Model
• Optimization
• Aluminum
• Wastes

ACKNOWLEDGMENTS

This project was supported by Autonomous Community of Madrid (Spain), under project CAM 07M/0061/98.