Process for purification of glycerol

Details Process for purification of glycerol Process for purification of glycerol

2009-02-23

2011-12-27

Witherspoon, Sikarl (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

Reexamination Certificate

active

08084651

ABSTRACT:
A process for the recovery of glycerol comprises contacting an aqueous feed composition that comprises water, glycerol, and at least one contaminant with a solvent extractant comprising at least one C5-C8 alkanol, optionally in admixture with at least one alkane, to form a first mixture, and separating the first mixture into a first solvent phase and a first aqueous phase. The first solvent phase comprises a majority (more than 50 wt %) of the solvent extractant and a majority of the glycerol that was present in the aqueous feed composition. The weight ratio in the first solvent phase of glycerol to a contaminant present is greater than the weight ratio of glycerol to the contaminant in the aqueous feed composition. The first aqueous phase comprises a majority of the water from the aqueous feed composition and at least some of the contaminant from the aqueous feed composition.

REFERENCES:
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patent: 7056439 (2006-06-01), Baniel et al.
patent: 513595 (1939-10-01), None
University of BATH, “Power to the People Biofuels,” www.bath.ac.uk/powerttp, the BA Festival of Science (Sep. 9-15, 2007).
PCT/US2009/036450 International Search Report (May 13, 2009).

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