Use of the Product from Low Pressure Extraction (Crambe Seed Oil and Methyl Acetate) for Synthesis of Methyl Esters and Triacetin Under Supercritical Conditions,European Journal of Lipid Science and Technology

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Use of the Product from Low Pressure Extraction (Crambe Seed Oil and Methyl Acetate) for Synthesis of Methyl Esters and Triacetin Under Supercritical Conditions
European Journal of Lipid Science and Technology ( IF 1.8 ) Pub Date : 2020-05-14 , DOI: 10.1002/ejlt.202000004
Najla Postaue ₁ , Bruna Tais Ferreira Mello ₁ , Lúcio Cardozo‐Filho ₁ , Camila da Silva _{1,

2}

Affiliation

Methyl esters (ME) and triacetin production from the supercritical interesterification of the product from low pressure extraction (crambe seed oil and methyl acetate) are evaluated. Reactions are conducted at 300–375 °C for different residence times, at 20 MPa, and under these conditions the thermal stability of triacetin is evaluated. The effect of the free fatty acid (FFA) concentration (in oil) is determined. An increase in temperature favors the formation of ME and triacetin at shorter reaction times. At 375 °C, after 15 min a drop in the ME yield is observed and triacetin is not detected. A reduction in the triacetin concentration (reaching ≈99%) is observed at 375 °C. High FFA concentration (in oil) initially provided higher product generation, however, after 15 min no influence is observed. The highest ME yield (≈60%) is obtained at 300 °C, along with 1.22 wt% triacetin and ≈5.0 wt% unreacted compounds.

中文翻译：

低压萃取产物（Crambe籽油和乙酸甲酯）在超临界条件下用于甲基酯和三醋精的合成

评估了低压萃取产物（蛤be籽油和乙酸甲酯）的超临界酯交换反应生成的甲酯（ME）和三醋精。反应在300–375°C下进行不同的停留时间，在20 MPa下进行，并在这些条件下评估三醋精的热稳定性。确定游离脂肪酸（FFA）浓度（在油中）的影响。温度升高有利于在较短的反应时间形成ME和三醋精。在375°C，15分钟后，ME收率下降，未检测到三醋精。在375°C时，三醋精浓度降低（达到≈99％）。高FFA浓度（在油中）最初可提供更高的产物生成量，但是15分钟后未观察到影响。在300°C时可获得最高的ME收率（≈60％），

更新日期：2020-05-14

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