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| Comprehensive evaluation of the bleaching effect of montmorillonite on vegetable oil |
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| DOI： |
| KeyWord:montmorillonite bleaching vegetable oil activated clay |
| FundProject: |
| Author Name | Affiliation | | HUANG Junqi1, ZHANG Hailong1,2, LYU Xiaoya1, CHEN Gang3, HU Yongjie3, LI Bing4 , GONG Ren4, QI Yutang1,2, ZHANG Weinong1,2 | 1.College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023,China
2.Engineering Research Center of Lipid-Based Fine Chemicals of Hubei Province,Wuhan 430023,China
3.Hubei Sanding Technology Co., Ltd., Ezhou 436060, Hubei, China
4.China Grain Wuhan Scientific Research and Design Institute Co., Ltd.,Wuhan 430079,China |
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| Abstract: |
| The effects of montmorillonite produced with the semi-dry method on the qualities of soybean oil, sunflower seed oil and rapeseed oil under different bleaching conditions (bleaching temperature, bleaching time and dosage) were investigated to develop an efficient and environmentally friendly bleaching agent for edible oil. The results showed that the bleaching agent(montmorillonite) had the function of adsorbing pigments and peroxides to reduce red value and peroxide value. Compared with oils before bleaching, the red value of soybean oil, sunflower seed oil and rapeseed oil was decreased by 77.4%, 92.3% and 87.2% (the largest reduction), respectively, the peroxide value was decreased by 82.7%, 83.2% and 91.2% (the largest reduction), respectively. When montmorillonite was used for the bleaching of three kinds of vegetable oils, the content of total sterols and total tocopherols in vegetable oils decreased, while the acid value increased slowly. Further research found that the effect of montmorillonite on the acid value, total sterol content and oil absorption rate of soybean oil, sunflower seed oil and rapeseed oil was better than that of activated clay under the same bleaching conditions, especially the oil absorption rate was almost half of that of the activated clay. Montmorillonite can be used as a substitute for activated clay in the bleaching of vegetable oils where the colour requirements are not very high. |
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