In this study, the efficiency of dimethyl carbonate as a solvent in the pressurized liquid extraction (PLE) of crambe seed oil and also as the acyl acceptor in the transesterification reaction using the mixture obtained, simulating a sequential process, was investigated. In the PLE process, the effect of temperature (140–180 °C) on the yield and quality of the oil was evaluated, and the results were compared to data obtained applying Soxhlet extraction. The reaction of the PLE mixture was conducted from 250 to 350 °C. The results showed greater oil removal from the seeds under pressurized conditions, reaching a yield of ∼45%, which was higher than the yield obtained with Soxhlet extraction. The fatty acids and acylglycerols composition of the extracts obtained with the two methods were similar. However, the phytosterols and tocopherols contents of the oil obtained by PLE were around ∼62% and ∼574% higher, respectively, compared with the oil from the Soxhlet extraction. The best results in the reaction step for ester yield (66.5%) and triglyceride conversion (98.5%) were obtained at 300 °C.

在这项研究中，模拟了顺序过程，研究了碳酸二甲酯作为溶剂在青菜籽油的加压液体萃取（PLE）中以及在酯交换反应中作为酰基受体的效率。在PLE过程中，评估了温度（140–180°C）对油的产量和质量的影响，并将结果与​​使用索氏提取法获得的数据进行了比较。PLE混合物的反应在250至350℃下进行。结果表明，在加压条件下从种子中去除的油脂更多，达到约45％的产率，高于索氏提取法获得的产率。用两种方法获得的提取物的脂肪酸和酰基甘油组成相似。然而，与通过索氏提取法提取的油相比，通过PLE获得的油中植物甾醇和生育酚的含量分别高出约62％和574％。在300℃下，反应步骤中酯收率（66.5％）和甘油三酸酯转化率（98.5％）的最佳结果。