An alternative method for the biodiesel or fatty acid alkyl ester (FAAE) synthesis has been proposed—rapeseed oil interesterification with methyl formate. Reaction with methyl formate proceeds at a relatively low temperature (28 °C) instead of 55–65 °C necessary for triglyceride reactions with methanol and other monoesters. Similarly to transesterification with methanol, the product of the reaction with methyl formate consists of two layers. The main product the fatty acid methyl ester (FAME) is located in the top layer, but the process by-product formins forms the bottom layer. In this work, solutions of potassium alkoxides (methoxide, ethoxide, isopropoxide, tert-butoxide) in appropriate alcohols as homogeneous catalysts were used, adhering to the catalyst to oil molar ratio (COMR) 0.1 and methyl formate to oil molar ratio (MFOMR) 18. The FAAE content in the biodiesel layer in presence of all catalysts was 77–81 wt.%, which is lower than the level required by the EN14214 but significantly higher than the FAME content in reactions with methyl acetate under the same conditions. Fuel properties such as flash point, carbon residue, density, viscosity, and cold flow properties were investigated. For samples with MFOMR equal to or higher than 36 FAAE exceed 93% and the main characteristics of samples correspond to the EN14214 limits even without product purification.

已经提出了生物柴油或脂肪酸烷基酯（FAAE）合成的另一种方法-用甲酸甲酯对菜籽油进行酯交换。与甲酸甲酯的反应在相对较低的温度（28°C）下进行，而不是甘油三酸酯与甲醇和其他单酯反应所需的55-65°C。与用甲醇进行酯交换反应相似，与甲酸甲酯的反应产物由两层组成。主要产品脂肪酸甲酯（FAME）位于顶层，但加工副产物甲福明则形成底层。在这项工作中，使用醇钾盐（甲醇，乙醇，异丙醇，叔丁醇）在适当的醇中作为均相催化剂的溶液，坚持催化剂与油的摩尔比（COMR）0.1和甲酸甲酯与油的摩尔比（MFOMR） 18岁 在所有催化剂存在下，生物柴油层中的FAAE含量为77-81 wt。％，低于EN14214要求的水平，但显着高于在相同条件下与乙酸甲酯反应中的FAME含量。研究了燃料特性，如闪点，碳残留量，密度，粘度和冷流特性。对于MFOMR等于或高于36 FAAE的样品，其超过93％，并且即使不进行产品纯化，样品的主要特性也符合EN14214的限值。研究了冷流特性。对于MFOMR等于或高于36 FAAE的样品，其超过93％，并且即使不进行产品纯化，样品的主要特性也符合EN14214的限值。研究了冷流特性。对于MFOMR等于或高于36 FAAE的样品，超过93％，并且即使不进行产品纯化，样品的主要特性也符合EN14214的限值。