TY - JOUR
AU1 - Kongjao, Sangkorn
AU2 - Damronglerd, Somsak
AU3 - Hunsom, Mali
AB - The purification of crude glycerol from a biodiesel plant using waste used-oil as a raw material was carried out on a laboratory scale by using the combined chemical and physical treatments based upon repeated cycles of acidification to the desired pH within the range of 1–6 using 1.19 M H2SO4, allowing phase separation and harvesting of the glycerol-rich middle phase followed by neutralization of the harvested glycerol phase with 12.5M NaOH. Subsequently, the glycerol-enriched fraction was extracted by ethanol. The results indicated that increasing the pH of the acidification step led to an increased yield of the glycerol-rich layer and decreased amount of inorganic salt and free fatty acids phase. Under strong acid conditions, large quantities of fatty acid and salt in the glycerol-enriched fraction were eliminated and, at pH 1, high purity glycerol (∼93.34%) with relatively low contaminant levels (0.00045% (w/w) ash and 5.16% (w/w) MONG) was obtained.
TI - Purification of crude glycerol derived from waste used-oil methyl ester plant
JF - Korean Journal of Chemical Engineering
DO - 10.1007/s11814-010-0148-0
DA - 2010-03-31
UR - https://www.deepdyve.com/lp/springer-journals/purification-of-crude-glycerol-derived-from-waste-used-oil-methyl-hfsgP1oB0m
SP - 944
EP - 949
VL - 27
IS - 3
DP - DeepDyve
ER -