| Project/Area Number |
05453101
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
反応・分離工学
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| Research Institution | Kyoto Institute of Technology |
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Principal Investigator |
TERAMOTO Masaaki Kyoto Institute of Technology, Department Professor of Chemistry and Materials Technology, 工芸学部, 教授 (60026086)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUYAMA Hideto Okayama University, Department of Environmental Chemistry and Materials Lecturer, 環境理工学部, 講師 (50181798)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 1994: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1993: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | Polyunsaturated fatty acid / Eicoapentaenoic acid / Docosahexaenoic acid / Silver nitrate / Liquid membrane / Carrier transport / Extraction / Uphill transport / イオン交換膜 |
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| Research Abstract |
Extraction equilibria in the extraction of ethyl esters of PUFA (PUFA-Et) such as EPA-Et and DHA-Et with silver nitrate solutions were investigated. The results suggest that PUFA-Et is extracted as the complex (PUFA-Et・nAg) ^<n+> in the aqueous phase (n : number of C=C in PUFA). The solvent effect on the distribution ratio was interpreted by the UNIFAC equation. Addition of alcohol to the aqueous phase incraesed the distribution ratio remarkably.
Experiments on the extraction of EPA-Et and DHA-Et contained in bonito oil ethyl ester (bonito oil-Et) with aqueous silver nitrate solutions were performed using a countercurrent vibromixer with a feed inlet in the middle of the column. The results were interpreted by the model calculation.
PUFA-Ets in n-dodecane were successfully transported to m-xylene phase against their concentration gradidnts through supported liquid membranes containing silver nitrate as a carrier.
A circulating liquid membrane was proposed where a silver nitrate solution was circulated between a feed phase and the receiving phase vessels. PUFA-Ets were transported against their concentration gradients from the feed vessel to the receiving vessel which was kept at higher temperature than the feed vessel. These are new types of uphill transport utiulizing the solvent ] and the temperature effects on the distribution ratios.
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