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Open AccessArticle

Subcritical Butane Extraction of Wheat Germ Oil and Its Deacidification by Molecular Distillation

State Key Laboratory of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province Jiangnan University, Wuxi 214122, China
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Academic Editor: Yu Yang
Molecules 2016, 21(12), 1675; https://doi.org/10.3390/molecules21121675
Received: 11 October 2016 / Revised: 29 November 2016 / Accepted: 30 November 2016 / Published: 7 December 2016
(This article belongs to the Special Issue Sub- and Supercritical Fluids and Green Chemistry)
Extraction and deacidification are important stages for wheat germ oil (WGO) production. Crude WGO was extracted using subcritical butane extraction (SBE) and compared with traditional solvent extraction (SE) and supercritical carbon dioxide extraction (SCE) based on the yield, chemical index and fatty acid profile. Furthermore, the effects of the molecular distillation temperature on the quality of WGO were also investigated in this study. Results indicated that WGO extracted by SBE has a higher yield of 9.10% and better quality; at the same time, its fatty acid composition has no significant difference compared with that of SE and SCE. The molecular distillation experiment showed that the acid value, peroxide value and p-anisidine value of WGO were reduced with the increase of the evaporation temperatures, and the contents of the active constituents of tocopherol, polyphenols and phytosterols are simultaneously decreased. Generally, the distillation temperature of 150 °C is an appropriate condition for WGO deacidification with the higher deacidification efficiency of 77.78% and the higher retention rate of active constituents. View Full-Text
Keywords: wheat germ oil; subcritical butane extraction; molecular distillation wheat germ oil; subcritical butane extraction; molecular distillation
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MDPI and ACS Style

Li, J.; Sun, D.; Qian, L.; Liu, Y. Subcritical Butane Extraction of Wheat Germ Oil and Its Deacidification by Molecular Distillation. Molecules 2016, 21, 1675.

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