CEWT's process to produce caustic soda/ Soda ash and derivatives directly from the seawater

CEWT Seawater-to-Chemicals Technology The global chlor-alkali industry depends heavily on high-purity crystalline salt produced from solar evaporation ponds. Modern caustic soda plants, with capacities ranging from several hundred to several thousand tonnes per day, require vast quantities of salt as feedstock for the production of caustic soda, chlorine, and hydrogen. However, increasing climate variability, erratic monsoon patterns, extreme rainfall events, and changing weather conditions are creating growing uncertainty in salt production regions. These disruptions can affect both salt availability and pricing, leading to higher production costs and supply-chain risks for chlor-alkali manufacturers. The impact extends far beyond the chemical sector. Industries dependent on caustic soda, chlorine, and related products—including aluminium refining, mineral processing, pulp and paper, detergents, glass manufacturing, water treatment, and numerous downstream chemical industries—are increasingly exposed to feedstock price volatility and supply uncertainty. CEWT’s proprietary seawater-processing technology offers an alternative pathway. Using a combination of Seawater Reverse Osmosis (SWRO), Electrodialysis (ED), and proprietary process integration, CEWT can directly produce valuable industrial chemicals from seawater, including: • Caustic Soda (NaOH) • Chlorine (Cl₂) • Hydrogen (H₂) • Sodium Carbonate (Na₂CO₃) • Sodium Bicarbonate (NaHCO₃) By reducing dependence on solar-evaporated salt production, the technology has the potential to provide a more stable and climate-resilient supply of critical industrial chemicals while leveraging one of the world’s most abundant natural resources: seawater. The approach offers potential benefits in: • Supply-chain resilience • Reduced dependence on salt harvesting • Improved feedstock security • Climate-change adaptation • Strategic industrial self-sufficiency • Integration with desalination and water-treatment infrastructure As global demand for industrial chemicals continues to grow, technologies that decouple production from increasingly vulnerable raw-material supply chains may become an important component of future industrial sustainability and resource security strategies. This framing is likely to resonate with chemical companies, aluminium refiners, investors, and government agencies because it focuses on resource security and climate resilience, which are becoming major strategic concerns.