Glycolipids of the Recovered Palm Oil from Spent Earth in the Physical Refining Process

Abstract

Glycolipids in recovered palm oil from spent earth in the physical refining process of Malaysian palm oil were determined. The content of glycolipids in the recovered oil was 3.8%, higher than ten times that of crude palm oil, and the recovery of glycolipids from the spent earth was calculated as 0.86%. The presence of esterified steryl glycoside (ESG), monogalactosyl diglyceride, cerebrosides, steryl glycoside (SG), and digalactosyl diglyceride was estimated as well as that of monogalactosyl monoglyceride. Glycolipid composition of the recovered palm oil was almost the same as that of crude palm oil.
The fatty acid composition of each glycolipid showed palmitic acid to be the major saturated acid and oleic acid, the major unsaturated acid.
4-Desmethylsterol compositions of ESG and SG showed the presence of sitosterol, ampesterol, stigmasterol, cholesterol, 7-stigmastenol and avenasterol, in this order.