| 陈园顺,刘玉兰,董 婷,李时军,彭建业.米糠混合油碱炼脱酸工艺效果的研究[J].中国油脂,2014,39(1):.[CHEN Yuanshun,LIU Yulan,DONG Ting,LI Shijun,PENG Jianye.Alkali refining of rice bran miscella[J].China Oils and Fats,2014,39(1):.] |
| 米糠混合油碱炼脱酸工艺效果的研究 |
| Alkali refining of rice bran miscella |
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| DOI： |
| 中文关键词: 米糠油 混合油碱炼 碱炼得率 谷维素 甾醇 |
| 英文关键词:rice bran oil miscella alkali refining alkali refining yield oryzanol sterols |
| 基金项目: |
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| 中文摘要: |
| 研究了米糠混合油碱炼脱酸工艺条件对提高碱炼得率和降低谷维素、甾醇等营养成分损失率的影响。结果表明：高酸值米糠毛油采用混合油碱炼脱酸比毛油碱炼脱酸在提高碱炼得率、降低谷维素和甾醇损失方面有显著优势；最佳的米糠混合油碱炼脱酸工艺条件为碱炼温度55℃，总加碱量为理论加碱量加0.3%超量碱（占油质量），混合油浓度40%，碱液质量分数11.06%；在最佳条件下，米糠混合油碱炼得率71.62%，谷维素损失率63.22%，甾醇损失率43.76%，较米糠毛油碱炼脱酸的碱炼得率提高16.48个百分点，谷维素损失率降低30.56个百分点，甾醇损失率降低21.41个百分点。 |
| 英文摘要: |
| The influences of alkali refining conditions of rice bran miscella on increasing the alkali refining yield and reducing the loss rates of oryzanol and sterols were investigated. The results showed that the crude rice bran oil with high acid value refined by miscella alkali refining had higher alkali refining yield and lower loss rates of oryzanol and sterols than that refined by alkali refining. The optimal alkali refining conditions of rice bran miscella were obtained as follows：alkali refining temperature 55℃, total alkali dosage theoretical alkali dosage with 0.3% of exceeding alkali dosage (based on the oil mass), miscella concentration 40%, mass fraction of lye 11.06%. Under these conditions, the alkali refining yield of rice bran miscella was 71.62% and the loss rates of oryzanol and sterols were 63.22% and 43.76%, respectively. Comparing with alkali refining of crude rice bran oil, the alkali refining yield increased by 16.48%, and the loss rates of oryzanol and sterols decreased by 30.56% and 21.41%, respectively. |
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