scholarly journals Supercritical extraction as an effective first-step in a maize stover biorefinery

RSC Advances ◽  
2015 ◽  
Vol 5 (54) ◽  
pp. 43831-43838 ◽  
Author(s):  
Thomas M. Attard ◽  
Elke Theeuwes ◽  
Leonardo D. Gomez ◽  
Emma Johansson ◽  
Ioanna Dimitriou ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Extraction ◽  
Added Value ◽  
Maize Stover ◽  
Supercritical Carbon

Supercritical carbon dioxide (scCO2) extraction has been investigated for the generation of valuable waxy compounds and as an added-value technology in a holistic maize stover biorefinery.

Supercritical extraction process and phase equilibrium of Candeia (Eremanthus erythropappus) oil using supercritical carbon dioxide

2008 ◽  
Vol 47 (2) ◽  
pp. 182-187 ◽  
Author(s):  
Alexandre Teixeira de Souza ◽  
Toni Luis Benazzi ◽  
Marcelo Boer Grings ◽  
Vladimir Cabral ◽  
Edson Antônio da Silva ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Phase Equilibrium ◽  
Supercritical Carbon Dioxide ◽  
Extraction Process ◽  
Supercritical Extraction ◽  
Supercritical Carbon

scholarly journals Extraction of essential oils from lime (Citrus latifolia Tanaka) by hydrodistillation and supercritical carbon dioxide

2005 ◽  
Vol 48 (1) ◽  
pp. 155-160 ◽  
Author(s):  
Ana Cristina Atti-Santos ◽  
Marcelo Rossato ◽  
Luciana Atti Serafini ◽  
Eduardo Cassel ◽  
Patrick Moyna
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Essential Oils ◽  
Flow Rate ◽  
Plant Material ◽  
Supercritical Extraction ◽  
Extraction Time ◽  
Citrus Latifolia ◽  
Co2 Flow ◽  
Supercritical Carbon

In this work lime essential oils were extracted by hydrodistillation and supercritical carbon dioxide. In the case of hydrodistillation, the parameters evaluated were extraction time and characteristics of the plant material. In supercritical extraction, the parameters evaluated were temperature, pressure, CO2 flow, extraction time and material characteristics. Considering citral content, the best results for hydrodistillation were obtained with a distillation time of 3 hours using whole peels. The best results for supercritical extraction were found using 60ºC, 90 bar, at a CO2 flow rate of 1 mL/ min for 30 minutes using milled peels. The best yields of lime oil were obtained by hydrodistillation (5.45% w/w) and supercritical extraction (7.93% w/w) for milled peels.

scholarly journals Enhancing Phenolic Contents and Antioxidant Potentials ofAntidesma thwaitesianumby Supercritical Carbon Dioxide Extraction

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Warut Poontawee ◽  
Surapol Natakankitkul ◽  
Orawan Wongmekiat
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Added Value ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Phenolic Contents ◽  
Phenolic Constituents ◽  
Supercritical Carbon

Supercritical fluid extraction (SFE) has increasingly gained attention as an alternative technique for extraction of natural products without leaving toxic residues in extracts.Antidesma thwaitesianumMuell. Arg. (Phyllanthaceae), or ma mao, has been reported to exhibit antioxidant health benefits due to its phenolic constituents. To determine whether SFE technique could impact on phenolic contents and associated antioxidant potentials, ripe fruits ofAntidesma thwaitesianum(Phyllanthaceae) were extracted using supercritical carbon dioxide (SC-CO2) and conventional solvents (ethanol, water). The results showed that the SC-CO2extract contained significantly higher yield, total phenolic, flavonoid, and proanthocyanidin contents than those obtained from ethanol and water. It also demonstrated the greatest antioxidant activities as assessed by ABTS radical cation decolorization, DPPH radical scavenging, and ferric reducing antioxidant power (FRAP) assays. Further analysis using high-performance liquid chromatography with diode array and mass spectrometry detectors (HPLC-DAD/MSD) revealed the presence of catechin as a major phenolic compound ofAntidesma thwaitesianum(Phyllanthaceae), with the maximum amount detected in the SC-CO2extract. These data indicate that SFE technology improves both quantity and quality ofAntidesma thwaitesianumfruit extract. The findings added more reliability of using this technique to produce high added value products from this medicinal plant.

scholarly journals Supercritical Extraction Technology of Obtaining Polyunsaturated Acids from Starfish (Lysastrosoma anthosticta Fisher, 1922)

2022 ◽  
Vol 51 (4) ◽  
pp. 753-758
Author(s):  
Alexander Zakharenko ◽  
Konstantin Kirichenko ◽  
Igor Vakhniuk ◽  
Kirill Golokhvast
Keyword(s):  
Carbon Dioxide ◽  
Fatty Acids ◽  
Supercritical Carbon Dioxide ◽  
Saturated Fatty Acids ◽  
Lipid Fraction ◽  
Supercritical Extraction ◽  
Qualitative Composition ◽  
Extraction Technology ◽  
Lysastrosoma Anthosticta ◽  
Supercritical Carbon

Introduction. Starfish (Asteroidea) are marine echinoderms with more than 160 species. Starfish are a valuable source of protein and fats. The present research featured the chemical composition of starfish, which can be used as a commercial source of lipids. Study objects and methods. The study defined the optimal parameters for extracting the lipid fraction of Lysastrosoma anthosticta with supercritical carbon dioxide, as well as the qualitative composition of the obtained extracts. Results and discussion. The yield of fatty acids obtained with supercritical carbon dioxide co-solvent was 1.8 times higher than that obtained with standard extraction according to the Folch method. The content of impurities was lower than in the samples with chloroform-methanol system. The polyunsaturated fatty acids isolated from L. anthosticta mainly belonged to ω-3 (18.0%), ω-6 (11.7%), ω-7 (21.2%), ω-9 (10.1%), and ω-11 (6.5%). The rest was saturated fatty acids, mainly palmitic (14%) and myristic (6%). The qualitative composition of the lipid fraction did not depend significantly from the isolation method. However, the supercritical extraction increased the product yield, extraction rate, and the quality of the extraction residue. Supercritical carbon dioxide left a dry residue, which had no typical smell and was brittle enough for grinding. Such residue can presumably be used to produce protein concentrate. Conclusion. Supercritical extraction with chloroform can be recommended to isolate fatty acids from marine organisms at 60°C and 400 bar.

scholarly journals Supercritical Extraction by Carbon Dioxide of Uranium from Ore Concentrates and Low-Enriched Ores of Tailing

2016 ◽  
pp. 56-60
Author(s):  
B. Borts ◽  
S. Ivanova ◽  
I. Koliabina ◽  
G. Lysychenko ◽  
V. Tkachenko
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Acid Leaching ◽  
Supercritical Extraction ◽  
Fluid Extraction ◽  
Environmental Status ◽  
Subsequent Improvement ◽  
Supercritical Carbon

The extraction and processing of uranium ores in Ukraine have led to the accumulation of large amounts of waste. It is obvious that the old technologies are not applicable to the extraction of uranium from such waste. Therefore, the search for the new, more efficient methods of extracting residual amounts of waste nutrients and subsequent improvement of the environmental status of contaminated areas are both necessary. The supercritical carbon dioxide fluid extraction (SFE-CO2) is proposed as a method that can be utilized independently or as the last step of the acid leaching method adopted at VostGOK to extract the uranium. The efficiency of uranium SFE-CO2 can reach 98%.

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