Caustic Soda Production Plant Engineering for a More Independent and Profitable Chemical Industry

Caustic soda production plant engineering refers to the design and construction of systems that produce sodium hydroxide (NaOH) through electrolysis. At Welysis, we help companies in the chemical, salt, and industrial sectors achieve production autonomy, reduce costs, and operate more sustainably through custom-built modular plants.

Our standard caustic soda production process delivers a 32% NaOH concentration. However, we offer optional soda concentrators that allow our clients to reach 50% concentration, depending on their production needs and market requirements.

Safety and quality are central to our caustic soda plant design. We implement advanced membrane-based electrolysis technology and strict quality control systems to ensure stable production, operator safety, and environmental compliance. Our plants are engineered to handle the corrosive nature of caustic soda with maximum reliability.

Welysis offers a comprehensive service beyond plant delivery. This includes technical training, preventive and corrective maintenance, and ongoing optimisation through the Welysis International Network (WIN) —our global platform for continuous improvement, knowledge sharing and best practice benchmarking.

The Welysis International Network (WIN) is a unique ecosystem that connects all our installed plants worldwide. It provides access to process optimisation tools, innovation hubs, real-time data analysis, continuous training, supplier management and global best practices—helping you improve efficiency, quality, and competitiveness.

Thanks to our modular and plug & play design, Welysis significantly reduces setup times compared to traditional projects. While timelines vary by project scale, our caustic soda production plant engineering model is designed for rapid commissioning and minimal disruption.

Yes. We support clients in upgrading legacy systems by integrating new chlor-alkali plant technologies. Whether it’s improving energy efficiency, increasing capacity, or transitioning to membrane electrolysis, we bring your facility in line with modern industrial production of caustic soda.

Absolutely. Our modular caustic soda plant design adapts to both large-scale industry and regional or distributed production models. This flexibility allows small and medium chemical producers, salt processors, or distributors to localize their production, increase margins, and strengthen their market presence.

Yes. Our chlor-alkali plant design allows for the co-production of hydrogen as a valuable by-product. Hydrogen can be used internally, stored, or commercialized, adding extra value to your industrial caustic soda production.

Welysis plants are engineered to comply with leading international safety, quality, and environmental standards, including ISO norms. Through WIN, clients also benefit from annual audits and continuous improvement aligned with global industry benchmarks.

We optimise every stage of the caustic soda production plant design — from brine purification to electrolysis cells and final product handling — using real-time monitoring, automation, and predictive analytics integrated into our plant systems.

While the standard electrolytic process for caustic soda production generates chlorine and hydrogen as co-products, we can assess and adapt plant configurations depending on local regulations, safety conditions, and your specific business model.

The total investment depends on several factors: desired capacity, degree of automation, NaOH concentration, integration level, and geographic location. Our team will guide you through every step of the caustic soda production plant engineering process to optimize cost-benefit.

Our plants are fully modular and designed for easy expansion. As your production needs grow, additional modules can be integrated with minimal downtime — a key advantage of our modular caustic soda plant design.