EXTRACTION OF CARBOXYLIC ACIDS FROM A DILUTE AQUEOUS STREAM

The present invention provides a process for removing free carboxylic acid from an aqueous solution comprising a mass fraction of less than 1 %wt of the free carboxylic acid, which process comprises the steps of: (a) contacting the aqueous solution with a depleted solvent comprising a polyamine extr...

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Bibliographic Details
Main Authors SCHUUR, BOELO, DE HAAN, ANDRÉ BANIER, KRZYZANIAK, AGNIESZKA
Format Patent
LanguageEnglish
French
German
Published 26.11.2014
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:The present invention provides a process for removing free carboxylic acid from an aqueous solution comprising a mass fraction of less than 1 %wt of the free carboxylic acid, which process comprises the steps of: (a) contacting the aqueous solution with a depleted solvent comprising a polyamine extractant to obtain an extract enriched in free carboxylic acid and a raffinate having a reduced free carboxylic acid content; and (b) separating the raffinate from the extract, wherein the polyamine extractant is a compound containing at least two nitrogen atoms, and at least one double bond between a nitrogen atom and a carbon atom, wherein the carboxylic acid is produced by the fermentation of biomass.
Bibliography:Application Number: EP20130703896