- The invention enables quantitative furfural and acetic acid extraction from a diluted aqueous solution using isophorone as an efficient and environmentally friendly extractant.
- The method is very efficient and selective
- The method for furfural and acetic acid extraction from its diluted aqueous solutions by liquid-liquid extraction with isophorone following by distillation.
- A typical application is the separation and recovery of acetic acid and furfural from a hardwood prehydrolysate
The present invention describes a method for the separation and recovery of furfural and carboxylic acids such as acetic acid from dilute aqueous solutions. In the method of the present invention at least one carboxylic acid and furfural is extracted with isophorone from a dilute aqueous mixture. The method of the present invention includes an extraction unit (EXTRCOL) where furfural and carboxylic acids are extracted by isophorone from dilute aqueous mixture. The extraction unit is connected to a distillation unit (DIST1) for the distillation of the extract provided by the extraction unit and further connected to multiple distillation units, DIST-AQ and DIST-F, for additional distillation of the top streams AQ-RICH and F-RICH from the distillation unit DIST1 to separate at least one carboxylic acid and furfural.
Priority date: June 15th, 2017
Olga Ershova, Juha-Pekka Pokki, Anna Zaitseva
and Herbert Sixta
Ershova O. et al. Chem. Eng. Sci. 176 (2018) 19-34
+358 50 3397534