Sodium Aluminate
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Sodium aluminate used industrially as a coagulant and flocculant in water treatment, a mordant in fabric printing, and in the production of paper, alumina-based catalysts, and zeolites. Sodium aluminate reduce the effluent pH below acceptable discharge levels and deplete the available alkalinity.
Sodium Aluminate is produced by reacting sodium hydroxide with aluminum oxide or bauxite, and is a corrosive substance that can cause severe skin burns and eye damage. Sodium aluminate (formula NaAlO₂) is an inorganic white solid, often found in solution.
Dosage
Alumina trihydrate (ATH) is dissolved in Sodium Hydroxide and water and as part of the manufacturing process for sodium aluminate liquid. Strongly alkaline Sodium Aluminate Liquid is stabilised to stop alumina from precipitating. Sodium aluminate liquid is offered in a range from 38 to 45% Solution.
Notes
Typical uses of Sodium Aluminate liquid include the following:
• Drinking water treatment applications
• Clarification and phosphorus removal in wastewater treatment applications
• Lime softening aid in process and groundwater treatment applications
• pH adjustment and pitch control in paper mill applications
• Surface treatment in titanium dioxide manufacturing applications
• Synthetic zeolite and catalyst production
• Refractory cement additives
• Concrete additives
• Industrial detergent compounds
• Manufacturing industrial glue
• Sodium Aluminate as a heterogeneous base catalyst for biodiesel production
Industrial area
Sodium aluminate (NaAlO₂) – sometimes blended with alum to improve coagulation and alkalinity.