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| Optimization of subcritical butane extraction of Cyperus esculentus oil and product quality |
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| DOI： |
| KeyWord:Cyperus esculentus oil subcritical butane extraction process optimization product quality |
| FundProject:国家重点研发计划项目“大豆及其替代作物产业链科技创新”（SQ2019YFD100114）；河南省重大科技专项“高产优质油莎豆新品种选育及产业化示范”（211100110100） |
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| Abstract: |
| Cyperus esculentus oil was extracted by subcritical butane extraction method，and the subcritical extraction conditions were optimized by single factor experiment and response surface methodology under the condition of subcritical extraction pressure of 0.5 MPa with residual oil rate of Cyperus esculentus meal as an index. In addition, the quality of the oil extracted with subcritical butane was analyzed. The results indicated that the optimal extraction conditions were obtained as follows: Cyperus esculentus particles 0425 mm (40 meshes),extraction temperature 45 ℃, extraction time 50 min, and liquid-solid ratio 8∶ 1. Under the optimal conditions, the residual oil rate of Cyperus esculentus meal was 2.91% when extracted for once. The acid value and peroxide value of subcritical butane extracted Cyperus esculentus oil were 1.33 mgKOH/g and 0.074 g/100 g, respectively; the content of unsaturated fatty acids reached 84.26%; the sterol and vitamin E contents were 171.43 mg/100 g and 201.81 mg/kg, respectively. By using subcritical butane extraction method, the residual oil rate of meal was low, and the quality of the oil reached the quality index of LS/T 3259-2018 Cyperus esculentus oil. Overall, the subcritical butane extraction was a method worthy of application in the production of Cyperus esculentus oil. |
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