T. Haryati et al., EFFECT OF REPEATED HEATING ON THERMAL-BEHAVIOR OF CRUDE PALM OIL, Journal of the American Oil Chemists' Society, 74(4), 1997, pp. 393-396
Thermal behavior of crude palm oil (CPO) is important to determine the
optimal fractionation process and product yield. In this study, the e
ffects of repeated heating on thermal behavior of CPO were examined by
differential scanning calorimetry. CPO was heated at 80 degrees C for
5 min, and hearing was repeated five times to simulate the common con
ditions experienced by an oil before reaching the refinery. The result
revealed that the thermal behavior of CPO changed after heating. The
change, however, occurred only in the behavior of the high-melting ste
arin peak but not in the low-melting olein peak. Overheating split the
stearin peak at 17.30 degrees C to two peaks at 18.88 and 17.30 degre
es C and formed a new peak at 11.28 degrees C. Apparently, a new subst
ance has been synthesized.