Alkaline silicon extraction and acid aluminium recovery enable selective, high-purity zeolite precipitation from refractory mineral residues at lower energy.
Using water-soluble ODSO in one aqueous gel forms crystalline zeolite and amorphous binder together, cutting DSO disposal waste and process steps.
Simultaneous ammonium hexafluorosilicate and ammonium hydroxide treatment creates mesoporous zeolites with fewer steps and lower cost.