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Process for reducing sulphate ion concentration in aqueous sodium hydroxide solutions
Process for reducing sulphate ion concentration in aqueous sodium hydroxide solutions
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机译:降低氢氧化钠水溶液中硫酸根离子浓度的方法
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摘要
A process is disclosed for reducing sulphate ion concentration in an aqueous solution comprising sodium hydroxide. The process comprises adding sodium carbonate or bicarbonate to said aqueous solution to form an insoluble sodium carbonate-sodium sulphate double salt, removing said insoluble salt, and recovering a purified aqueous sodium hydroxide solution.
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