基于分子蒸馏技术紫苏油α-亚麻酸纯化效果的研究

为了探究分子蒸馏技术纯化紫苏油α-亚麻酸的可行性,筛选紫苏油提取方法的基础上,考察了蒸馏温度、蒸馏压力、刮板转速和进料速度4个因素对分子蒸馏技术纯化α-亚麻酸效果的影响。结果表明,紫苏油最佳提取法为超临界CO₂萃取法,α-亚麻酸纯化的首要影响因素是蒸馏温度,其次是蒸馏压力,再次是进料速度,最后是刮板转速。最佳纯化工艺：蒸馏温度220℃,蒸馏压力0.07 mbar,刮板转速375 r/min,进料速度1.0 d/min,该工艺条件下α-亚麻酸纯度达到97.42%。该方法有效提高了紫苏油α-亚麻酸的纯度,为高纯度α-亚麻酸的研究和利用奠定了理论基础。

α-Linolenic Acid from Perilla Oil: Purification Effect Based on Molecular Distillation Technology

In order to explore the purification feasibility of α-linolenic acid from perilla oil based on molecular distillation technology, based on screening the best extraction method of perilla oil, the effects of four factors of distillation temperature, distillation pressure, scraper speed and feed speed on purification of α-linolenic acid were studied. The results show that the supercritical CO₂ extraction method is the best for perilla oil, and the primary factor affecting the purity of α-linolenic acid is distillation temperature, followed by distillation pressure, feed speed and scraper speed. The optimal purification process is as follows: distillation temperature of 220℃, distillation pressure of 0.07 mbar, scraper speed of 375 r/min, feed speed of 1.0 d/min, under this process condition, the purity of α-linolenic acid could reach 97.42%. This method significantly improves the purity of α-linolenic acid from perilla oil, and could lay a theoretical foundation for the research and utilization of highly purified α-linolenic acid.