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| Optimization of simultaneous deacidification and decolorization of rapeseed oil by adsorption |
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| DOI： |
| KeyWord:rapeseed oil solid adsorbent deacidification decolorization |
| FundProject: |
| Author Name | Affiliation | | XIONG Shuangli1, LI Anlin1, CHEN Qiubing2, HE Jianqiong3 | 1.College of Food Science and Technology, Sichuan Tourism University, Chengdu 610100, China
2.College of Life Science and Technology, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
3.Sichuan Yukang Agricultural Science and Technology Limited Company, Deyang 618500, Sichuan, China |
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| Abstract: |
| In order to develop efficient and environmentally friendly refining technology of rapeseed oil, the prefabricated deacidifier was first prepared using diatomite，activated clay and sodium hydroxide solution，then mixed with decolorizer to prepare solid adsorbent for simultaneous deacidification and decolorization of hot-pressed rapeseed oil.The simultaneous deacidification and decolorization conditions were optimized through single factor experiment and response surface design. At the same time, the quality indexes of the deacidified and decolorized rapeseed oil were investigated. The results showed that the optimal simultaneous deacidification and decolorization conditions were as follows: with activated clay as decolorizer,mass ratio of prefabricated deacidifier to activated clay 1∶1,treatment time 15 min, treatment temperature 90℃, solid adsorbent addition 5%. Under these conditions,The deacidification rate was 96.98% and the decolorization rate was 84.04%. Meanwhile, the color, moisture and volatile content, acid value and peroxide value of the deacidified and decolorized rapeseed oil were less than the national standard limit value for first grade rapeseed oil(GB 1536-2004). In conclusion, the solid adsorbent can be used for the simultaneous deacidification and decolorization of hot-pressed rapeseed oil. |
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