Separation of glycolic acid from Glycolonitrile (cas 107-16-4) hydrolysate by reactive extraction with tri-n-octylamine
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Add time:08/20/2019 Source:sciencedirect.com
The extraction of glycolic acid from an aqueous Glycolonitrile (cas 107-16-4) hydrolysate with tri-n-octylamine (TOA) in diluents of 1-octanol and kerosene was investigated in this article. The influences of TOA concentration, extraction temperature and phase ratio, O/W (volume ratio of organic phase to aqueous phase) on the acid distribution coefficient and loading factor of TOA were measured. The liquid-liquid equilibrium data of glycolic acid distributed between the extract phase and the raffinate phase were determined, and correlated with a model developed from the mass action law and suitable assumptions. Additionally, the acid loaded extractants were regenerated by using pure water as the back-extractant. The results show that lower temperature is beneficial to the extraction of glycolic acid from the hydrolysate, while higher temperature and phase ratio (O/W) are favorable to the back-extraction.
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