Optimization of supercritical fluid extraction of phytosterol from roselle seeds with a central composite design model
Optimization of supercritical fluid extraction of phytosterol from roselle seeds with a central composite design model
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DOI：
10.1016/j.fbp.2009.11.002
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发表时间：
2010-07-01
影响因子：
4.6
通讯作者：
Man, Y. B. Che
中科院分区：
文献类型：
--
作者：
Nyam, K. L.;Tan, C. P.;Man, Y. B. Che
玫瑰茄中植物甾醇的提取在200-400巴的压力、40至80摄氏度的温度和10至20毫升/分钟的超临界流体流速下，研究了通过用乙醇改性的超临界二氧化碳萃取玫瑰茄种子的方法。发现，与使用超临界CO2获得的值相比，诸如乙醇的增溶剂可以提高玫瑰茄种子油从种子基质中的溶解度和萃取产率。在典型的跑步之后（保持时间30 min，连续流提取3 h），结果表明，在相对较低的温度（40 ° C）下，油的回收率最佳，回收率为108.74%，植物甾醇成分为7262.80 mg kg（-1），400巴的高压和20 ml/min的高超临界流体流速，在2 ml/min的EtOH作为分散剂的存在下。在200、300和400巴的操作压力下，玫瑰茄籽油的溶解度随温度而增加。超临界流体萃取涉及短的萃取时间和最小的使用量的CO2中的少量增塑剂。(C)2009年，化学工程师学会。Elsevier B. V.出版，保留所有权利。
Recovery of phytosterol from roselle (Hibiscus sabdariffa L.) seeds via supercritical carbon dioxide extraction modified with ethanol was investigated at pressures of 200-400 bar, temperatures from 40 to 80 degrees C and at supercritical fluid flow rates from 10 to 20 ml/min. It was found that an entrainer such as ethanol could enhance the solubility and extraction yield of roselle seed oil from the seed matrix, compared to values obtained using supercritical CO2. After a typical run (holding period of 30 min, continuous flow extraction of 3 h), the results indicate that the oil recovery was optimal with a recovery of 108.74% and a phytosterol composition of 7262.80 mg kg(-1) at relatively low temperature of 40 degrees C, a high pressure of 400 bar and at a high supercritical fluid flow rate of 20 ml/min in the presence of 2 ml/min EtOH as entrainer. The solubility of roselle seed oil increased with temperature at the operating pressures of 200, 300 and 400 bar. Supercritical fluid extraction involved a short extraction time and the minimal usage of small amounts of entrainer in the CO2. (C) 2009 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.