The use of alternative sources to produce less pollutant biofuels and biomaterials, replacing petroleum-derived products, is becoming an important issue for international organizations, governments, and society. Thus, biodiesel and biolubricant production has been increasingly researched, offering promising results. These products present some advantages such as sustainability or biodegradability, among others. However, some of their quality parameters can be altered during storage, mainly due to their low oxidative stability. Consequently, auto-oxidation processes can take place, increasing viscosity or acid number, which can compromise their marketability. To avoid these inconveniences, some alternatives have been presented, such as the use of antioxidants, vegetable oil selection or the promotion of mild chemical conditions during production. The aim of this work was to assess the use of vacuum during biolubricant production from high-oleic safflower oil through double transesterification with methanol and 2-ethyl-2-(hydroxymethyl)-1,3-propanediol to obtain mild chemical conditions. Under these circumstances (working pressure at 210 mmHg) and compared to previous studies, temperature and catalyst addition could be reduced from 140 to 100 °C and from 0.5 to 0.3%, respectively, increasing the reaction yield from 92.9 to 94.69% and improving the quality of the biolubricant, with 30% increase in viscosity index.

使用替代资源生产污染较少的生物燃料和生物材料，取代石油衍生产品，正在成为国际组织、政府和社会的重要问题。因此，对生物柴油和生物润滑剂的生产进行了越来越多的研究，并提供了有希望的结果。这些产品具有一些优势，例如可持续性或生物降解性等。然而，它们的一些质量参数在储存过程中可能会发生变化，这主要是由于它们的低氧化稳定性。因此，可能会发生自动氧化过程，增加粘度或酸值，这会损害它们的适销性。为了避免这些不便，已经提出了一些替代方案，例如使用抗氧化剂、选择植物油或在生产过程中促进温和的化学条件。这项工作的目的是评估在通过与甲醇和 2-乙基-2-(羟甲基)-1,3-丙二醇的双酯交换反应从高油酸红花油生产生物润滑油过程中真空的使用，以获得温和的化学条件。在这些情况下（工作压力为 210 mmHg），与之前的研究相比，温度和催化剂添加量可分别从 140 至 100 °C 和 0.5 至 0.3% 降低，将反应产率从 92.9 提高至 94.69% 并提高生物润滑剂的质量，粘度指数增加 30%。