Separation and purification of furan carboxylates
AssigneeTeknologian tutkimuskeskus VTT Oy
InventorsDavid Thomas, Juha Linnekoski
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Abstract
According to an example aspect of the present invention, there is provided a method for separating and purifying furan carboxylates from a crude reaction mixture comprising furans, by utilizing high vacuum distillation in a total heating environment.
Claims10
A method for separating and purifying furan carboxylates from a crude reaction mixture comprising at least furoic acid ester, 2,5-furandicarboxylic acid (FDCA) ester, an aldaric acid, and an aldaric acid ester, wherein the method comprises:
- filtering of the crude reaction mixture to remove solids and to obtain a liquid phase,
- evaporating the liquid phase at a temperature of 20-60° C. and at a pressure below 100 mbar,
- re-dissolving the evaporated liquid phase into an alcohol solvent,
- isolating the furoic acid ester and the 2,5-furandicarboxylic acid (FDCA) ester from the aldaric acid, the aldaric acid ester, and the alcohol solvent at a pressure lower than 4 mbar by vacuum distillation in a uniformly heated distillation apparatus.
A method for separating and purifying a 2,5-furandicarboxylic acid (FDCA) ester from a mixture comprising at least the FDCA ester and an aldaric acid and/or an aldaric acid ester, wherein the method comprises:
- filtering of the crude reaction mixture to remove solids and to obtain a liquid phase,
- evaporating the liquid phase at a temperature of 20-60° C. and at a pressure below 100 mbar,
- re-dissolving the evaporated liquid phase into an alcohol solvent,
- isolating the FDCA ester from the aldaric acid and/or the aldaric acid ester and the alcohol solvent at a pressure lower than 4 mbar by vacuum distillation in a uniformly heated distillation apparatus.
Dependencies are inferred from the claim text.