Caustic soda plant setup in India: How aluminium growth is reshaping demand, costs and opportunities

Caustic soda may not be the most visible ingredient in aluminium production, but without it, the journey from bauxite to alumina would look very different. The chemical, also known as sodium hydroxide, is a crucial reagent in the Bayer process, where it helps dissolve alumina-bearing material in bauxite and separate it from impurities. The dissolved material is then processed to recover alumina, which ultimately feeds aluminium production. That makes caustic soda more than just another industrial chemical. Its availability, price and efficient use can influence the economics of alumina refining and, by extension, the wider aluminium value chain. As India expands its alumina and aluminium capacity, the requirement for this chemical is also becoming increasingly important. For companies...