Recovery of acetic acid from wood extracts

Details Recovery of acetic acid from wood extracts Recovery of acetic acid from wood extracts

C - Chemistry, Metallurgy

07

C

C07C 51/50 (2006.01)

Patent

CA 2704414

In a process for recovering acetic acid from a wood extract, an aqueous wood extract is provided that contains acetic acid and dissolved hemicellulose containing uronic acid. A water insoluble solvent containing an extractant for the acetic acid is also provided. In a preferred embodiment, the solvent is undecane and the extractant is trioctylphosphine oxide. The wood extract is contacted with the solvent and extractant in order to extract the acetic acid from the wood extract. The acetic acid is then recovered from the solvent and extractant.

L'invention concerne un procédé de récupération de l'acide acétique d'un extrait de bois, lequel extrait de bois aqueux contient de l'acide acétique ainsi que de l'hémicellulose dissoute qui contient de l'acide uronique. L'invention comporte également un solvant insoluble dans l'eau qui contient un agent extractant pour l'acide acétique. Dans un mode de réalisation préféré, le solvant est un undécane et l'agent extractant est l'oxyde de trioctylphosphine. L'extrait de bois est mis en contact avec le solvant et l'agent extractant pour extraire l'acide acétique de l'extrait de bois. L'acide acétique est ensuite récupéré du solvant et de l'agent extractant.

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