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首页> 外文期刊>Separation and Purification Technology >Separation of parthenolide from feverfew:performance of conventional and high-pressure extraction techniques
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Separation of parthenolide from feverfew:performance of conventional and high-pressure extraction techniques

机译：从小白菊中分离小白菊内酯：常规和高压萃取技术的性能

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摘要

In present work the extraction of feverfew flower heads was performed using supercritical carbon dioxide at pressures from 200 to 800 bar and at temperatures of 40,60 and 80 deg C.For comparison,the conventional extractions with organic solvents have been performed.Dry feverfew flower heads were used as starting material.Supercritical fluid extraction(SFE)was performed using a semi continuous flow apparatus in a laboratory and pilot scale.The influence of process parameters on the total yield and amount of parthenolide isolated was investigated.Dynamic behaviour of the extraction runs followed by single-step separation was analysed by a mathematical model for initial constant rate extraction period and the subsequent time-dependant diffusion controlling mass transfer rate period.In order to concentrate the obtained extract in parthenolide,a two-step separation was employed.
机译：在当前工作中，使用超临界二氧化碳在200至800 bar的压力下以及40,60和80摄氏度的温度下提取小白菊头花。为进行比较，已进行了常规的有机溶剂提取。头用作起始原料，在实验室和中试规模下使用半连续流设备进行超临界流体萃取（SFE），研究了工艺参数对分离出的小白菊内酯的总收率和分离量的影响。通过数学模型，对最初的恒定速率萃取期和随后的随时间变化的扩散控制传质速率期进行了分析，然后进行了一步分离。为了将所得提取物浓缩到小白菊内酯中，采用了两步分离。

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