超临界CO_2流体萃取小麦胚芽油工艺的研究

本文根据超临界流体萃取的基本原理,分析了影响超临界CO2流体萃取小麦胚芽油的主要因素,它们包括萃取压力、温度、时间、CO2流量、小麦胚芽水分含量及粒度等,通过正交试验和单因素试验研究了小麦胚芽油的萃取量与各因素之间的关系并确定了最佳的试验条件即为:萃取压力为32～36MP,温度为45～50℃、时间为6h,CO流量为15～20kg/ h,小麦胚芽水份含量为5.0%,粒度为10～15目。

Based on the foundational principle of extraction with supercritical fluid, this paper ascertained the principal factorsaffecting the extraction of wheat germ oil with supercritical CO2 fluid . These were extracting pressure ,extractingtemperature,extracting period ,carbon dioxide flow rate ,water content of wheat germ and its granule size etc. The optimalworking parameters were worked out via orthogonal extracting experiments (tests) and single factor experiments (tests).These were 32～36 MPa of extracting pressure ,45～50℃ of extracting temperature ,6 hours of extrating period ,20kg/h ofCO2 flow rate and 5.0 % of water content of wheat germ.