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Aqueous Two Phase Extraction for the Recovery of 1,3-Propanediol from Its Aqueous Solutions

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DOI: 10.4236/ampc.2012.24B040    3,804 Downloads   5,730 Views   Citations

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.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

M. Chung, Y. Ki Hong, H. Wook Lee and S. Park, "Aqueous Two Phase Extraction for the Recovery of 1,3-Propanediol from Its Aqueous Solutions," Advances in Materials Physics and Chemistry, Vol. 2 No. 4B, 2012, pp. 154-157. doi: 10.4236/ampc.2012.24B040.

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