Soybean oil fatty acid was esterified with glycerol to obtain diglyceride with strong acid cation exchange resin 732 as catalyst. The optimal conditions for synthesizing diglyceride were as follows; reaction temperature 100℃ , dosage of resin 10% ( based on the mass of fatty acid) , mass ratio of fatty acid to glycerol 5:1, reaction time 2 h. Under these conditions,the content of diglyceride in the reaction product was over 45% , and it could achieve 74% by molecular distillation for once. The contents of diglyceride obtained by soybean oil fatty acids with different contents of saturated fatty acids unchanged basically.%采用732型强酸性阳离子交换树脂作为催化剂,以甘油与大豆油脂肪酸为原料合成甘二酯,其最佳合成条件为:反应温度100℃,树脂用量为脂肪酸质量的10％,底物质量比(脂肪酸与甘油质量比)5∶1,反应时间2h.在此条件下得到反应产物中甘二酯的含量可达45％以上,经分子蒸馏一次提纯后,甘二酯含量可达74％.不同饱和脂肪酸含量的大豆油脂肪酸制得的甘二酯含量基本不变.
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