Continuous countercurrent liquid-liquid extraction method for the separation of 2,3-butanediol from fermentation broth using n-butanol and phosphate salt

- Continuous extraction method for the separation of 2,3-butanediol (BDO) from fermentation broth using n-butanol is provided.
- Bubble column was used for continuous countercurrent liquid-liquid extraction.
- Mass transfer parameters for BDO extraction are reported.
- Repulsive effect of dipotassium phosphate enhanced extraction efficiency of BDO in n-butanol.
- Newly parameterized UNIFAC-LL method is provided for BDO separation.