Purification of aqueous solutions of organic acids

Purification of aqueous solutions of organic acids

The invention relates to a method and a device for the purification of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450° C., which further has approximately 275 g carboxylate ions/l or less, preferably 250 g carboxylate ions/l or less, and prefer...

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Hauptverfasser: Winkelaar, Hendrik Martinus, Van Breugel, Jan, Camprubi Vila, Margarita, Vidal Lancis, Jose Maria
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Sprache:eng
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creator Winkelaar, Hendrik Martinus
Van Breugel, Jan
Camprubi Vila, Margarita
Vidal Lancis, Jose Maria
description The invention relates to a method and a device for the purification of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450° C., which further has approximately 275 g carboxylate ions/l or less, preferably 250 g carboxylate ions/l or less, and preferably less than 1% by weight ionic impurities, calculated on the basis of the total solution. In particular, the invention relates to a method and a device for the continuous purification and concentration, on an industrial scale, of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450° C. According to the method, this solution is subjected to two or more distillation steps, the first distillation step being carried out at a temperature of from 80° to 150° C. and a pressure of from 50 to 250 mbar, and the second distillation step being carried out at a temperature of from 80° to 200° C. and a pressure of from 0.01 to 50 mbar.
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title Purification of aqueous solutions of organic acids
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