Liquefied dimethyl ether as alternative extraction solvent for high <i>γ</i>-oryzanol rice bran oil: Systematic HSP theory and experimental evaluation

Phannipha Daisuk; Seiichi Takami; Masaki Honda; Motonobu Goto; Chonlatep Usaku; Artiwan Shotipruk

doi:10.1016/j.jobab.2024.06.002

Volume 9 Issue 4

Nov. 2024

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Phannipha Daisuk, Seiichi Takami, Masaki Honda, Motonobu Goto, Chonlatep Usaku, Artiwan Shotipruk. Liquefied dimethyl ether as alternative extraction solvent for high γ-oryzanol rice bran oil: Systematic HSP theory and experimental evaluation[J]. Journal of Bioresources and Bioproducts, 2024, 9(4): 577-591. doi: 10.1016/j.jobab.2024.06.002

Citation:

Phannipha Daisuk, Seiichi Takami, Masaki Honda, Motonobu Goto, Chonlatep Usaku, Artiwan Shotipruk. Liquefied dimethyl ether as alternative extraction solvent for high γ-oryzanol rice bran oil: Systematic HSP theory and experimental evaluation[J]. Journal of Bioresources and Bioproducts, 2024, 9(4): 577-591. doi: 10.1016/j.jobab.2024.06.002

Citation:

Phannipha Daisuk, Seiichi Takami, Masaki Honda, Motonobu Goto, Chonlatep Usaku, Artiwan Shotipruk. Liquefied dimethyl ether as alternative extraction solvent for high γ-oryzanol rice bran oil: Systematic HSP theory and experimental evaluation[J]. Journal of Bioresources and Bioproducts, 2024, 9(4): 577-591. doi: 10.1016/j.jobab.2024.06.002

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Liquefied dimethyl ether as alternative extraction solvent for high γ-oryzanol rice bran oil: Systematic HSP theory and experimental evaluation

doi: 10.1016/j.jobab.2024.06.002

a. Bio-Circular-Green-economy Technology & Engineering Center, BCGeTEC, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;
b. Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan;
c. Department of Chemistry, Faculty of Science & Technology, Meijo University, Shiogamaguchi, Tempaku-ku, Nagoya, Aichi 468-8502, Japan;
d. Super Critical Technology Centre Co. Ltd., Kuwana, Mie 511-0838, Japan;
e. Research Unit on Sustainable Algal Cultivation and Applications, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Funds:

This research project is supported by theSecond Century Fund (C2F) and Chulalongkorn University and Thailand Science Research and Innovation Fund Chulalongkorn University(No.BCG66210015).

Publish Date: 2024-06-28

Abstract

Abstract

This study aimed to systematically find an alternative solvent to replace hexane for the extraction of bio-oil with high γ-oryzanol content from rice bran (RB). The selection involved predicting solubility through Hansen solubility theory, experimental validation, determination of suitable extraction conditions, and comparison of oil quality with that of conventional hexane. A wide variety of solvents: subcritical water (SCW), supercritical carbon dioxide (SCCO₂), bio-based solvents (alcohols and terpenes), and liquefied dimethyl ether (LDME), were initially assessed for rice bran oil (RBO) and γ-oryzanol solubility using Hansen solubility spheres. Solvents demonstrating high solubility for both RBO and γ-oryzanol, including LDME, ethyl acetate, acetone, and others (alcohols and SCCO₂) known for effective vegetable oil extraction, were selected/identified for experimental extraction comparison. Among these, LDME performed better overall, affording greater solubility and requiring less solvent, shorter duration, lower pressure, and no additional co-solvents for equivalent extractions. Optimal conditions for LDME extraction were identified as 30 ℃ with a solvent-to-sample ratio of 10 mL/g and an extraction time of 10 min. Oils extracted with LDME and hexane displayed similar fatty acid compositions and no adverse effects on RB protein and carbohydrate structures after LDME extraction were observed. This study demonstrates LDME as a promising alternative to replace hexane for RBO extraction to further valorize this abundant low-cost RB residue into bio-oil and its γ-oryzanol and de-oil RB co-products.
- Rice bran oil,
- γ-oryzanol,
- Liquefied dimethyl ether,
- Hansen solubility sphere,
- Fourier transform infrared

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References(62)

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