Vaccinium meridionale Swartz Supercritical CO2 Extraction: Effect of Process Conditions and Scaling Up

Supercritical CO2 extraction was applied on fenugreek (Trigonella foenum-graecum L., Fabaceae) seeds with the aim to define optimal process conditions to obtain the maximal extract yields content of steroidal sapogenins. Central composite rotatable design (CCRD) combined with response surface methodology (RSM) was applied to determine optimal process conditions defined by the influence and interaction of pressure, temperature and time of extraction through consumption of SC CO2. Optimization experiments revealed that the pressure of 24.73 MPa, the temperature of 38.?C and the consumption of SC CO2 of 19.24 g/gDM were the best process conditions enabling the maximal yield of extract and gain of the highest content of sapogenins. The optimal values of pressure and temperature defined SC CO2 density of 885.47 kg/m3, which provided the maximal yield of the extract with the highest content of steroidal sapogenins. The achieved yield of extract at these conditions was 0.073g/gDM, with 0.774 mg/gDM diosgenin, 0.477 mg/gDM protodioscin, 0.713 mg/gDM sarsapogenin and 0.205 mg/gDM oleanolic and ursolic acid with a significant quantity of 2.475 mg/gDM in the obtained extract.

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Supercritical CO2 Extraction And Optimization of Total Phenols From Strawberry tree (Arbutus unedo L.) Fruits: A Comparative Study

Planta Medica ◽

10.1055/s-0031-1282646 ◽

2011 ◽

Vol 77 (12) ◽

Author(s):

Ş Akay ◽

I Alpak ◽

Ö Yeşil Çeliktaş

Keyword(s):

Comparative Study ◽

Supercritical Co2 ◽

Total Phenols ◽

Supercritical Co2 Extraction ◽

Arbutus Unedo ◽

Strawberry Tree

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Optimized Supercritical CO2 Extraction Enhances the Recovery of Valuable Lipophilic Antioxidants and Other Constituents from Dual-Purpose Hop (Humulus lupulus L.) Variety Ella

Antioxidants ◽

10.3390/antiox10060918 ◽

2021 ◽

Vol 10 (6) ◽

pp. 918

Author(s):

Nóra Emilia Nagybákay ◽

Michail Syrpas ◽

Vaiva Vilimaitė ◽

Laura Tamkutė ◽

Audrius Pukalskas ◽

...

Keyword(s):

Supercritical Co2 ◽

Antioxidant Properties ◽

Extraction Yield ◽

Biologically Active ◽

High Yield ◽

Acid Extraction ◽

Supercritical Co2 Extraction ◽

Bioactive Constituents ◽

Total Extract

The article presents the optimization of supercritical CO2 extraction (SFE-CO2) parameters using response surface methodology (RSM) with central composite design (CCD) in order to produce single variety hop (cv. Ella) extracts with high yield and strong in vitro antioxidant properties. Optimized SFE-CO2 (37 MPa, 43 °C, 80 min) yielded 26.3 g/100 g pellets of lipophilic fraction. This extract was rich in biologically active α- and β-bitter acids (522.8 and 345.0 mg/g extract, respectively), and exerted 1481 mg TE/g extract in vitro oxygen radical absorbance capacity (ORAC). Up to ~3-fold higher extraction yield, antioxidant recovery (389.8 mg TE/g pellets) and exhaustive bitter acid extraction (228.4 mg/g pellets) were achieved under the significantly shorter time compared to the commercially used one-stage SFE-CO2 at 10–15 MPa and 40 °C. Total carotenoid and chlorophyll content was negligible, amounting to <0.04% of the total extract mass. Fruity, herbal, spicy and woody odor of extracts could be attributed to the major identified volatiles, namely β-pinene, β-myrcene, β-humulene, α-humulene, α-selinene and methyl-4-decenoate. Rich in valuable bioactive constituents and flavor compounds, cv. Ella hop SFE-CO2 extracts could find multipurpose applications in food, pharmaceutical, nutraceutical and cosmetics industries.

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Supercritical CO2 extraction of Moroccan argan (Argania spinosa L.) oil: Extraction kinetics and solubility determination

Journal of CO2 Utilization ◽

10.1016/j.jcou.2021.101458 ◽

2021 ◽

Vol 46 ◽

pp. 101458

Author(s):

Adil Mouahid ◽

Isabelle Bombarda ◽

Magalie Claeys-Bruno ◽

Sandrine Amat ◽

Emmanuelle Myotte ◽

...

Keyword(s):

Supercritical Co2 ◽

Oil Extraction ◽

Supercritical Co2 Extraction ◽

Extraction Kinetics ◽

Argania Spinosa ◽

Solubility Determination

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Supercritical CO2 Extraction of Palladium Oxide from an Aluminosilicate-Supported Catalyst Enhanced by a Combination of Complexing Polymers and Piperidine

Molecules ◽

10.3390/molecules26030684 ◽

2021 ◽

Vol 26 (3) ◽

pp. 684

Author(s):

Andrea Ruiu ◽

Bernhard Bauer-Siebenlist ◽

Marin Senila ◽

W. S. Jennifer Li ◽

Karine Seaudeau-Pirouley ◽

...

Keyword(s):

Energy Saving ◽

Supercritical Co2 ◽

Supported Catalyst ◽

Precious Metals ◽

Palladium Oxide ◽

Supercritical Co2 Extraction ◽

Wide Range

Precious metals, in particular Pd, have a wide range of applications in industry. Due to their scarcity, precious metals have to be recycled, preferably with green and energy-saving recycling processes. In this article, palladium extraction from an aluminosilicate-supported catalyst, containing about 2 wt% (weight%) of Pd (100% PdO), with supercritical CO2 (scCO2) assisted by complexing polymers is described. Two polymers, p(FDA)SH homopolymer and p(FDA-co-DPPS) copolymer (FDA: 1,1,2,2-tetrahydroperfluorodecyl acrylate; DPPS: 4-(diphenylphosphino)styrene), were tested with regards to their ability to extract palladium. Both polymers showed relatively low extraction conversions of approximately 18% and 30%, respectively. However, the addition of piperidine as activator for p(FDA-co-DPPS) allowed for an increase in the extraction conversion of up to 60%.

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