Production of Rice Bran Oil with Light Color and High Oryzanol Content by Multi-stage Molecular Distillation

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• 作者：Jun Jin ; Dan Xie ; Hanqing Chen ; Xiaosan Wang…
• 关键词：Multi ; stage ; Molecular distillation ; Rice bran oil ; Color ; Transparency ; Decoloration ; Fractionation
• 刊名：Journal of the American Oil Chemists' Society
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：93
• 期：1
• 页码：145-153
• 全文大小：454 KB
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• 作者单位：Jun Jin (1)
  Dan Xie (1) (2)
  Hanqing Chen (3)
  Xiaosan Wang (1)
  Qingzhe Jin (1)
  Xingguo Wang (1)
  
  1. State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, 214122, Jiangsu, People’s Republic of China
  2. Zhong Hai Ocean (Wuxi) Marine Equipment Engineering Co., Ltd., Jiangnan University National University Science Park, 100 Jinxi Road, Wuxi, 214125, Jiangsu, People’s Republic of China
  3. Wuxi Zhicheng Food Technology Co., Ltd., Henghua Science Park, 58 Yuanxi Road, Wuxi, 214122, Jiangsu, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Industrial Chemistry and Chemical Engineering
  Analytical Chemistry
  Chemistry
  Biotechnology
  Biomaterials
  Agriculture
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1558-9331

文摘

Color is regarded as an important quality parameter for rice bran oil (RBO). Nevertheless, numerous grade-three and grade-four RBOs with dark color are currently available in the Chinese market. These oils are usually produced by steam refining and exhibit a mahogany color, which is undesired by customers. Here, we describe the development of a new industrially viable refining method based on multi-stage molecular distillation (MMD), through which decoloration and fractionation of grade-four RBO were accomplished, and four kinds of products, pigment oil, semi-refined oil-I (SRO-I), semi-refined oil-II (SRO-II), and semi-refined oil-III (SRO-III), were obtained. The pigment oil was hazy and mahogany colored, containing 84.84 % non-triacylglycerols, mainly pigments, tocopherols, and free fatty acids. SRO-I was hazy and orange, containing 20,563 mg/kg of oryzanol (accounting for 77–82 % of raw oil) and was 28.68 % of non-triacylglycerols. In particular, higher content of monounsaturated triacylglycerols, diunsaturated triacylglycerols and non-triacylglycerols was responsible for the haze. SRO-II and SRO-III had a clear yellow appearance and a non-triacylglycerol content <1.5 %. These semi-refined oils were mixed directly after MMD and further refined by mild deacidification and winterization to obtain fully refined oil, which met the requirements of commonly used standards. Notably, the final oil exhibited light color and retained nearly 80 % of the oryzanol of raw oil. The yield of final oil reached 80–85 % through the entire refining process.