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Heterogeneous esterification of oil with high amount of free fatty acids

机译：油与大量游离脂肪酸的异质酯化

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Frying oils have become the newest raw material for the transesterification reaction for the production of biodiesel. However, these compounds usually come with a certain amount of free fatty acids. These impurities can be transformed into esters and the production of biodiesel could be increased. The use of basic resins to perform the esterification reaction into biodiesel is studied in this work. The effect of the most relevant variables of the process such as reaction temperature, molar ratio between alcohol and oil, amount of catalyst and amount of free fatty acids fed with the oil have been analyzed. For this purpose, an ideal frying oil using oleic acid and soybean oil was made. The alcohol used was ethanol. The esterification of free fatty acid using this heterogeneous catalyst appears as a great alternative to purify frying oil; in this case, the final conversion achieved was around 80%.
机译：煎炸油已成为用于生产生物柴油的酯交换反应的最新原料。但是，这些化合物通常带有一定量的游离脂肪酸。这些杂质可以转化为酯，并且可以增加生物柴油的产量。在这项工作中，研究了使用碱性树脂将酯化反应转化为生物柴油。分析了该过程中最相关变量的影响，例如反应温度，醇与油之间的摩尔比，催化剂的量以及随油进料的游离脂肪酸的量。为此，使用油酸和大豆油制成了理想的煎炸油。使用的醇是乙醇。使用这种非均相催化剂对游离脂肪酸进行酯化似乎是纯化煎炸油的一种很好的选择。在这种情况下，最终的转化率约为80％。

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