环氧白花油脂肪酸甲酯的无羧酸法制备工艺

摘要

The self-made heteropolyphosphatotungstate was used as phase transformation catalyst in the epoxidation reaction of styrax tonkinensis seed oil. The epoxidation reaction was an efficient and environ-ment friendly process without traditionally used carboxylic acid as catalyst. The reaction conditions were optimized by orthogonal experiment as follows:fatty acid methyl ester of styrax tonkinensis seed oil 10 g, molar ratio of cetylpyridinium chloride monohydrate to phosphoric acid to tung stic acid of heteropoly-phosphatotungstate 2:1:4, hydrogen peroxide dosage 5. 67 g, dropping rate of hydrogen peroxide 150 mL/h,reaction time 0. 5 h and ethyl acetate dosage 20 mL. Under these conditions, the epoxy value of epoxidized styrax tonkinensis seed oil fatty acid methyl ester could reach 4 . 67%. The process had the items of short reaction time and no organic acid waste water pollution.%以白花油为原料，采用自制的季铵盐型磷钨杂多化合物为相转移催化剂，构建无羧酸的均相环氧化反应体系，并通过正交实验优化反应条件。确定的最佳反应条件为：10 g白花油脂肪酸甲酯，氯代十六烷基吡啶、磷酸与钨酸摩尔比2：1：4的季铵盐型磷钨杂多化合物为催化剂，双氧水用量5．67 g，双氧水滴加速度150 mL/h，反应时间0．5 h，乙酸乙酯用量20 mL。在最佳条件下制备的环氧白花油脂肪酸甲酯的环氧值可达4．67%，并可有效缩短反应时间，避免有机酸废水污染。