A METHOD AND A PLANT FOR PURIFYING LACTIC ACID
The present invention relates to a method for purifying a crude aqueous lactic acid composition comprising the steps of: i) heating and pressurizing the crude aqueous lactic acid composition so as to obtain a liquid, heated and pressurized crude aqueous lactic acid composition, ii) flash evaporating...
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Main Authors | , , , |
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Format | Patent |
Language | English French |
Published |
20.06.2024
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Subjects | |
Online Access | Get full text |
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Summary: | The present invention relates to a method for purifying a crude aqueous lactic acid composition comprising the steps of: i) heating and pressurizing the crude aqueous lactic acid composition so as to obtain a liquid, heated and pressurized crude aqueous lactic acid composition, ii) flash evaporating the liquid, heated and pressurized crude aqueous lactic acid composition obtained in step i) so as to obtain crude lactic acid vapor, iii) gradually condensing the crude lactic acid vapor obtained in step ii) by leading it through at least three successive condensers so as to obtain at least three condensed streams, one of which being a purified lactic acid stream.
La présente invention concerne un procédé de purification d'une composition d'acide lactique aqueuse brute comprenant les étapes consistant à : i) faire chauffer et mettre sous pression la composition d'acide lactique aqueuse brute de façon à obtenir une composition d'acide lactique aqueuse brute liquide, chauffée et sous pression, ii) réaliser une évaporation flash de la composition d'acide lactique brut liquide, chauffée et sous pression obtenue à l'étape i) de façon à obtenir de la vapeur d'acide lactique brut, iii) condenser progressivement la vapeur d'acide lactique brut obtenue à l'étape ii) en la faisant passer à travers au moins trois condenseurs successifs de façon à obtenir au moins trois flux condensés, dont l'un est un flux d'acide lactique purifié. |
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Bibliography: | Application Number: WO2023EP80214 |