TITLE:
Aqueous Two Phase Extraction for the Recovery of 1,3-Propanediol from Its Aqueous Solutions
AUTHORS:
Min Hee Chung, Yeon Ki Hong, Hyoung Wook Lee, Sung-Jun Park
KEYWORDS:
1, 3-Propanediol; Alcohols; Phase Separation; Extraction Efficiency
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.2 No.4B,
January
16,
2013
ABSTRACT: As the biodiesel production is rapidly enhanced, the crude glycerol, which is by-product of biodiesel processes, is state of surplus. 1,3-PDO (1,3-propanediol), a valuable monomer of poly(trimethylene terephthalate) (PTT), can be produced from the fermentation process using crude glycerin as a carbon source. For the economic biological production of 1,3-PDO, the low cost and high efficient separation processes is essential. In this study, aqueous two-phase system composed of various hydrophilic alcohols and salt was used as a primary separation step for 1,3-PDO. It was found that the aqueous two-phase systems are easily formed with decreasing of the polarity of alcohols. The extraction efficiency is proportional to the polarity of alcohols. In case of methanol or ethanol/K2HPO4, the extraction efficiency was more than 90%. It was concluded that the aqueous two-phase extraction using methanol or ethanol/K2HPO4 can be applied for the primary separation of 1,3-PDO as an alternative to a conventional primary separation processes.