安徽农业科学Issue(6)：3546-3547,2.
核桃油的超临界CO2萃取研究
Research on Extraction of Walnut Oil with Ultra-critical CO2
摘要
Abstract
[Objective] The study aimed to discuss the optimum technology conditions for extracting the walnut oil with the ultra-critical CO2. [ Method] With the walnuts produced from Xinjiang as the raw material, they were treated by the liquid nitrogen freeze-drying processing or by the drying processes after peeling, and the walnut oil were extracted with the ultra-critical CO2 technology. The effects of different extracting time on the yield of the walnut oil were studied to confirm the optimum technology conditions and the fatty acid composition in the walnut oil were determined and analyzed by using the gas chromatography. [ Result ] The proper technology conditions confirmed through the test were as follows: the peeled walnuts were freeze-dried by the liquid nitrogen, the extracting temperature was 40 ℃, the pressure was 31MPa, the extracting time was 4. 5 h and the separation temperature was 50℃. Under these conditions the yield of walnut oil was 59. 26% . The walnut treated by the liquid nitrogen get more light oil color and higher yield than the one without the liquid nitrogen treatment. The gas chromatography analysis showed that the walnut oil contained 59. 83% linoleic acid, 21.65% oleic acid and 10.95% linolenic acid. [Conclusion] The walnut oil obtained by the ultra-critical CO2 extraction technology was clear and bright, showing a light yellow color.关键词
核桃油/超临界CO2萃取/工艺Key words
Walnut oil/ Extraction with ultra-critical CO2/ Technology分类
轻工纺织引用本文复制引用
魏冬梅,梁艳英..核桃油的超临界CO2萃取研究[J].安徽农业科学,2012,(6):3546-3547,2.基金项目
西北农林科技大学大型仪器设备新功能开发项目(dysb090207). （dysb090207）
