环氧脂肪酸甲酯的合成及其降凝性能初探

Synthesis of Epoxy Fatty Acid Methylesters and Preliminary Exploration on Their Pour-point Depressing Properties

以生物柴油为原料,对环氧脂肪酸甲酯的合成工艺进行了研究。利用气相色谱及化学分析法,得出了较理想的工艺条件:脂肪酸甲酯100g,磷酸0.6mL,甲酸9mL,双氧水48mL,石油醚50mL,反应温度65℃,反应时间3.5h,所得环氧脂肪酸甲酯具有以下性能:环氧值4.89%,酸值0.2mg/g,碘值9～10g/100g,黏度5.87mm2/s。通过对生物柴油降凝性能的研究,结果表明,环氧脂肪酸甲酯可降低生物柴油冷滤点3℃,但对生物柴油凝固点没有影响。

The synthesis technology of epoxy fatty acid methylesters was studied. By gas-chromatography and chemical analysis, the best condition of the synthesis technology was obtained as follows： fatty acid methylester 100 g, phosphoric acid 0.6 mL, formic acid 9 mL, petroleum ether 50 mL, reaction temperature 65 ℃, reaction time 3.5 h. The properties of epoxy fatty acid methylesters were as follow： epoxy value 4.89 % , acid value 0.2 mg/g, iodine value 9-10 g/100 g, viscosity 5.87 mm^2/s. Through the test on pour-point depressing properties of biodiesel by adding epoxy fatty acid methylester, it was found that the epoxy product could reduce cold filtering point of biodiesel 3 ℃, but had no effect on freezing point.