Pilot Scale Extraction of Rice Bran Oil with Dense Carbon Dioxide

Shen, Zhe; Palmer, Martin; Ting, Simon S. T.; Fairclough, R. J.

doi:10.1021/jf950761z

Cited by 52 publications

(42 citation statements)

References 21 publications

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“…This is justified by the increase in solute vapor pressure with the increase in temperature. These results agree with the results of Shen et al (1996) that the apparent solubility of rice bran oil increases with pressure at 40°C and decreases at higher temperatures. He concludes that rice bran oil is more highly soluble at 310 bar and 40°C and that lower solubilitie's of carbon dioxide favor the separation of free fatty acids and triglicerides.…”

Section: Resultssupporting

confidence: 92%

“…In the second method, selective separation is achieved through gradual depressurization or gradual heating or cooling of the extract, which allows a controlled fractionation of the extract. Shen et al (1996) assessed the effects of temperature, pressures and extraction time of the rice bran oil on the yield and solute components extracted with subcritical and supercritical CO 2 . The results indicate an increase in the solubility of the rice bran oil by increasing the temperature up to 40ºC and then decreasing it.…”

Section: Introductionmentioning

confidence: 99%

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Supercritical fluid extraction (SFE) of rice bran oil to obtain fractions enriched with tocopherols and tocotrienols

Sarmento¹,

Ferreira

Hense

2006

Braz. J. Chem. Eng.

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-Parboiled rice bran oil was obtained with supercritical CO 2 at temperatures and pressures varying from 25 to 60ºC and from 150 to 250 bar, respectively. This study was divided into two different parts: initially, the experiments were carried out with one separation step. In the second part, experiments were performed with two separators in series. The temperatures and the pressures of the first separator were 25 and 40ºC, and 100 and 150 bar. The second separator was maintained at 2ºC and 25bar. This procedure results in the precipitation of rice bran oil with different concentrations of tocols in the first and second separators. The extracts obtained were analyzed by HPLC to verify the presence of tocopherols and tocotrienols. Unlike other vegetable oils, rice bran oil contains a larger amount of tocotrienols, specially γ-tocotrienol, than of tocopherols. Finally the extraction curves were modeled by Sovová's method.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Supercritical fluid extraction (SFE) of rice bran oil to obtain fractions enriched with tocopherols and tocotrienols

Sarmento¹,

Ferreira

Hense

2006

Braz. J. Chem. Eng.

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“…At 31.4MPa the lipid yield increased with the extracting temperature (p<0.05). Bhupsesh et al (26) reported that the extracting conditions have an effect on the lipid yield in tomato seed oil extraction. The oil yield increases with pressure.…”

Section: Extraction Of Salmon Roe Lipids With Scf-comentioning

confidence: 99%

“…Extraction of tomato seed oil resulted in a change in the fatty acid profile (26), because of the difference in the fatty acid solubility in SC-CO 2 . Soluble components can be extracted first in SC-CO 2 .…”

Section: Effect Of Extracting Temperature Andmentioning

confidence: 99%

Extraction of Lipids from Salmon Roe with Supercritical Carbon Dioxide

Tanaka

Ohkubo

2003

J. Oleo Sci.

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Freeze-dried salmon roe was extracted with supercritical carbon dioxide at a pressure range of 9.8-31.4MPa and temperature range 40-80 . The lipid yield and fatty acid profiles of the extracted lipids were affected by the extracting conditions. From the results affect of carbon dioxide density is estimated. At 80 the extracts were mostly affected by the extracting pressure. While at 17.7MPa the extracts were affected by the extracting temperature. The lipids obtained, contained triacylglycerides and their derivatives while the lipids not extracted contained triacylglycerides and phospholipids. In other words, two groups of triacylglycerides extracted from the freeze-dried salmon roe were found to be present in the salmon roe. In the first group is triacylglyceride to be extracted with supercritical carbon dioxide. In the other group is triacylglyceride not to be extracted. Less than 30% of astaxanthin, a functional pigment in the salmon roe was extracted. The loss of astaxanthin was less than 10% of the total involved in the process.

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“…For extraction of RBO, attempts using supercritical fluid extractions with CO 2 [2,[13][14][15] and methanol/CO 2 [16] were reported by several groups. A maximum RBO yield of 20.5%, which represents over 99% of lipid recovery, was reportedly obtained with a conventional approach using hexane, while the yield with supercritical CO 2 extraction ranged between 19.2 and 20.4% [2,15].…”

Section: Introductionmentioning

confidence: 99%

Batch Extraction of Oil from Rice Bran with Liquefied Low Temperature Dimethyl Ether

Hara

Kikuchi

Noriyasu

et al. 2016

SERDJ

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From a green chemical point of view, techniques for extracting organic substances employing conventional solvents must be replaced with novel environment-friendly techniques. Dimethyl ether (DME) may be one of such alternative solvents to be used. Rice bran is a co-product of rice milling, which is rich in oil content.Theoretically, around 20-25% of the total weight of rice bran must be oily components known as rice bran oil (RBO). In the present study, liquefied DME was used as a low temperature solvent for extracting RBO.From 10 g of fully dried rice bran used in a single batch extraction with DME, ca. 0.90 g of RBO were recovered (efficiency, 9.0%). Although the efficiency of total RBO extraction by batch extraction with DME was lower than the conventional solvent extraction system using acetone, lipid-pigment complexes potentially beneficial for human health such as ferulic acid-conjugated lipids were efficiently extracted.Fatty acid compositions found in RBO prepared by DME extraction and conventional solvent extraction did not differ. Lastly, improvement of the extraction efficiency was attempted by designing a column-based flow system allowing extraction of RBO with an optimized amount of liquefied DME. By this approach, the efficiency of RBO extraction attained ca. 24% (ca. 0.24 g of RBO extracted and recovered from 1 g of dried rice bran), using 10 to 20 g of liquefied DME applied to 1 g of rice bran packed in the column-type extraction chamber.

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Pilot Scale Extraction of Rice Bran Oil with Dense Carbon Dioxide

Cited by 52 publications

References 21 publications

Supercritical fluid extraction (SFE) of rice bran oil to obtain fractions enriched with tocopherols and tocotrienols

Supercritical fluid extraction (SFE) of rice bran oil to obtain fractions enriched with tocopherols and tocotrienols

Extraction of Lipids from Salmon Roe with Supercritical Carbon Dioxide

Batch Extraction of Oil from Rice Bran with Liquefied Low Temperature Dimethyl Ether

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