The technology reduces raw material costs, minimises hazardous waste generation, and improves overall production efficiency. Its environmentally responsible and economically viable process positions it as an attractive alternative for industries seeking sustainable manufacturing solutions in energy and pharmaceutical sectors.

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Sodium borohydride is widely used in hydrogen fuel cells and pharmaceutical manufacturing, yet conventional production methods can be energy-intensive, costly, and reliant on hazardous chemicals. Additionally, sodium metaborate waste generated from industrial processes is often underutilised, contributing to environmental burden and resource inefficiency.

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The invention converts recycled sodium metaborate waste into sodium borohydride through a solvothermal process using ethanol and urea as key reactants. This heat-driven method simplifies production, reduces dependency on toxic reagents, and maximises material utilisation with near-complete conversion efficiency.

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The key innovation lies in transforming industrial waste into a valuable chemical product through a green chemistry approach. By integrating waste recycling with an efficient solvothermal synthesis route, the method enhances sustainability while maintaining high production performance without requiring complex or high-cost infrastructure.

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