Sodium hydroxide, also known as caustic soda or liquid lye, is commonly used to adjust pH levels in water and wastewater treatment. Caustic soda is also used in the manufacturing of chemicals, rayon, cellophane, paper, detergents, soaps, and a variety of other products.
Caustic Soda Storage Challenges
Sodium hydroxide is a “slippery” chemical that seeks leak paths within storage tanks. It is also extremely corrosive to human tissue and highly toxic if ingested, so it must be handled with care. Finally, if caustic soda is not maintained and stored at a specific temperature, it will crystallize and turn into a solid.
Given the hazardous properties of caustic soda, specialized storage solutions are required.
Storage Solutions for Caustic Soda
Since sodium hydroxide is so corrosive, proper secondary containment is essential. Poly Processing's SAFE-Tank® can provide the necessary secondary containment solution to safely store caustic soda. This “tank within a tank” extends the margin of safety by providing a system with 110% secondary containment.
To eliminate sidewall penetrations and minimize potential leak sources for this “slippery” chemical, the IMFO® tank is recommended. This eliminates the need of a sidewall tank fitting and a potential leak source since the flange is a molded part of the tank.
Poly Processing can also provide heat trace systems and polyurethane insulation to solve the issue of crystallization at lower temperatures.
With chemical specific NSF 61 certification, high density cross linked polyethylene offers the tank strength required to safely store caustic soda while providing a cost-effective long tank life.