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| Controlling measurements of color during soybean oil production |
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| DOI：10.12166/j.zgyz.1003-7969/2020.05.027 |
| KeyWord:soybean oil consumption of clay natural pigment processing pigment stored pigment |
| FundProject: |
| Author Name | Affiliation | | ZUO Qing
L Rui
XU Hongchuang
CHENG Shuiyin
CHEN Youjun
HE Yuanping
ZUO Hui | 1.Jiangsu FAMSUN Oil & Fats Engineering Co.,Ltd., Yangzhou 225127,Jiangsu,China
2.Sino-Grain Oils and Fats Co., Ltd., Dongguan 523147, Guangdong, China
3. Guangzhou Xinmas Co.,Ltd., Guangzhou 510460, China) |
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| Abstract: |
| Some soybean oils contain special impurities and pigments, resulting in excessively high amount of clay during bleaching and poor oxidation stability of the finished oil. In order to prevent the deepening of the color during the preparation and refining of soybean oil, and reduce the amount of clay, different measures could be adopted, such as adjusting the parameters during the pretreatment process of soybean to cure partial pigments, reducing the processing pigments during solvent extraction by adopting multi-stage filtration, decreasing the evaporation and stripping temperature and modifying the structure of the stripping tower, adjusting the operating parameters according to the crude oil quality obtained from the small sample experiments, and modifying some bleaching equipment. The fininshed oil standard were acid value 0.05 mgKOH/g and color Y5-6/R0.5-0.6 for packaging oil,and acid value 0.07-0.08 mgKOH/g and color Y7/R0.7 for bulking oil. Consumption of decolorized clay for soybean oil and 2-3 mgKOH/g crude oil decreased by an average of 30% on the basis of 17-24 kg/t. The life-shelf of the packaged oil obviously prolonged. |
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