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Salicylic acid is nowadays produced by the Kolbe-Schmitt reaction. Using this method, sodium salicylate is converted into salicylic acid by the addition of sulphuric acid. Electrodialysis is proposed for this production process and avoids the use of sulphuric acid and the production of an acidic sodium sulphate waste stream. The low solubility of salicylic acid in water can be overcome by using mixtures...
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