Purification of mono-diacylglycerides (MDAG) through saponification and solvent extraction was studied. MDAG was prepared by direct esterification of glycerol, a by product of biodiesel process, with palm fatty acids distillates (PFAD) in the presence of acid catalyst methylester sulfonates. The purification process started with addition of nhexane to remove TAG, followed by saponification with alkaline solution to saponify free fatty acids and extraction to dissolve soaps. The result showed that saponification and solvent extraction can increase the purity of MDAG. The white, dry texture, and odorless product obtained from saponification with 0.1 N NaOH and extraction with ethanol and water (1:1). The yield of MDAG was 39.68%, pH value of 6.0, melting point at 52oC, and 72% emulsion stability for 12 hours. The approximate content of MDAG from TLC analysis was 48%, while free fatty acid was 13.62%.
展开▼
机译：研究了通过皂化和溶剂萃取纯化单二甘油酯（MDAG）。通过在酸催化剂甲酯磺酸盐的存在下，将甘油（一种生物柴油工艺的副产品）与棕榈脂肪酸馏出物（PFAD）直接酯化来制备MDAG。纯化过程开始于添加正己烷以去除TAG，然后用碱性溶液皂化以使游离脂肪酸皂化并萃取以溶解肥皂。结果表明，皂化和溶剂萃取可以提高MDAG的纯度。用0.1 N NaOH皂化并用乙醇和水（1：1）萃取得到的白色，干燥，无味的产品。 MDAG的产率为39.68％，pH值为6.0，在52°C时的熔点和72％的12个小时的乳液稳定性。 TLC分析的MDAG含量约为48％，而游离脂肪酸为13.62％。
展开▼
