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標題: 米糠醇之純化與米糠油之超臨界二氧化碳脫酸
Purification of γ-Oryzanols and Supercritical Carbon Dioxide Deacidification of Rice Bran Oil
作者: 王泠雅
Wang, Ling-Ya
關鍵字: 米糠油;rice bran oil;米糠醇;管柱層析;超臨界二氧化碳;萃取蒸餾;脫酸程序;γ-oryzanols;column partition fractionation;supercritical carbon dioxide;extraction distillation;deacidification
出版社: 化學工程學系所
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本研究探討米糠醇之單離與純化,以及米糠油之脫酸程序。首先以半製備級高壓液相層析儀,單離出米糠油中二種主要的米糠醇,即純度為98.5%的24-methylenecycloartanyl ferulate與純度為98%的campesteryl ferulte。在管柱層析脫酸米糠醇油方面,中壓管柱脫酸2.1%米糠醇濃度的米糠油,可獲得37 %米糠醇濃度的分層油,其中脂肪酸含量為55%,其他成份含量為8%。在超臨界二氧化碳萃取蒸餾程序方面,以200 bar、353K和2700克的二氧化碳,在填充27公分高θ型網的萃取槽,脫酸游離脂肪濃度為10%的米糠油,可在塔底獲得游離脂肪酸濃度為0.26 %的脫酸油。最後,以應答曲面設計的超臨界二氧化碳脫酸米糠油程序方面,發現二氧化碳用量對超臨界萃米糠油中游離脂肪酸移除效率的影響,強於填料網高度對其之影響。

This stady examined purification of γ-oryzanols and deacidifiction of rice bran oil from rice bran powder. Two major oryzanols were isolated from the a oryzanols mixture using a semi-preparative high-pressure liquid chromatography. The 98.5 % purest of 24-methylene-cycloartanyl ferulate and 98 % purest of campesteryl ferulte were obtained. Using a normal-phase solid-liquid column partition fractionation, the 37.03 wt% of γ-oryzanols in one collected fraction was obtained. Experimental data on supercritical carbon dioxide deacidification of 10% free fatty acid contained oil at 200 bar, 353K, consumed with 2700 g of carbon dioxide indicated that concentration of free fatty acid in the raffinate oil dramatically decreased down to 0.26%, and the oil still retained 1.3% of γ-oryzanols and 94.7% triglyceride. Finally, response surface methodology designed supercritical carbon dioxide deacidification revealed that the decreasing of free fatty acid in oil was significantly affected by the consumption of carbon dioxide and was less influenced by the height of the packed material.
其他識別: U0005-2208200712544900
Appears in Collections:化學工程學系所

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