scholarly journals Enhancement of Supercritical Fluid Extraction in Membrane Cleaning Process by Addition of Organic Solvents

2013 ◽  
Vol 34 (3) ◽  
pp. 403-414 ◽  
Author(s):  
Jan Krzysztoforski ◽  
Andrzej Krasiński ◽  
Marek Henczka ◽  
Wojciech Piątkiewicz
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Fluid Extraction ◽  
Organic Solvents ◽  
Supercritical Fluid ◽  
Batch Process ◽  
Process Efficiency ◽  
Fluid Extraction ◽  
Membrane Cleaning ◽  
Supercritical Carbon

Abstract In this study, the process of membrane cleaning by supercritical fluid extraction was investigated. Polypropylene microfiltration membranes, contaminated with oils, were treated in a batch process with a supercritical fluid (SCF). As extractant, pure supercritical carbon dioxide or supercritical carbon dioxide with admixtures of methanol, ethanol and isopropanol were used. Single-stage and multi-stage extraction was carried out and process efficiency was determined. The obtained results showed that addition of organic solvents significantly enhances the cleaning performance, which increases with increase of organic solvent concentration and decreases with increasing temperature. All three solvents showed a comparable effect of efficiency enhancement. The results confirmed that supercritical fluid extraction can be applied for polypropylene membrane cleaning.

Supercritical carbon dioxide extraction of β-carotene and α-tocopherol from pumpkin: a Box–Behnken design for extraction variables

2017 ◽  
Vol 9 (2) ◽  
pp. 294-303 ◽  
Author(s):  
Xiudong Wang ◽  
Chen Wang ◽  
Xianjun Zha ◽  
Yanan Mei ◽  
Jingxin Xia ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Supercritical Carbon Dioxide Extraction ◽  
Fluid Extraction ◽  
Box Behnken Design ◽  
Carbon Dioxide Extraction ◽  
Β Carotene ◽  
Supercritical Carbon

In this study, supercritical fluid extraction with carbon dioxide was applied to achieve a successful extraction of both β-carotene and α-tocopherol from pumpkin.

Studies on the supercritical fluid extraction of uranium from tissue matrix

2002 ◽  
Vol 90 (3) ◽  
Author(s):  
R. Kumar ◽  
N. Sivaraman ◽  
T. G. Srinivasan ◽  
P. R. Vasudeva Rao
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Extraction Efficiency ◽  
Fluid Extraction ◽  
Tissue Matrix ◽  
Supercritical Carbon

SummaryExtraction of uranium from tissue matrix was studied using supercritical carbon dioxide containing modifier solvent. The extraction efficiency was investigated with carbon dioxide containing methanol, tri-

scholarly journals Extraction of sweet wormwood (Artemisia annua L.) by supercritical carbon dioxide

2020 ◽  
pp. 22-36
Author(s):  
Senka Vidović ◽  
Siniša Simić ◽  
Aleksandra Gavarić ◽  
Milica Aćimović ◽  
Jelena Vladić
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Artemisia Annua ◽  
Soxhlet Extraction ◽  
Fluid Extraction ◽  
Artemisia Annua L ◽  
Sweet Wormwood ◽  
Supercritical Carbon

In this study, supercritical carbon dioxide was applied for the extraction of Artemisia annua L. Moreover, the impact of different parameters of supercritical extraction on total yield was investigated and the obtained yields were compared to the ones obtained by conventional procedures, hydrodistillation and Soxhlet extraction. Supercritical fluid extraction at 40 °C and different pressures (100, 200, and 300 bar) resulted in extraction yields that were in the 2.23-5.18 % range, while the yields at 60 °C and the same pressures were in the range 2.43-3.35 %. The yields obtained by the Soxhlet extraction and hydrodistillation were 10.28 % and 0.10 %, respectively. Although supercritical fluid extraction is inferior to Soxhlet extraction in terms of the recovery of lipophilic components of A. annua, the Soxhlet extraction is not the method of choice for obtaining sweet wormwood extracts due to its numerous disadvantages that include the use of toxic solvents, extended extraction time, health safety of the product, the need for further processing, the impossibility of adjusting the selectivity and thus the composition of the product.

Supercritical fluid extraction of uranium and thorium from nitric acid medium using organophosphorous compounds

2015 ◽  
Vol 103 (4) ◽  
Author(s):  
K. C. Pitchaiah ◽  
K. Sujatha ◽  
C. V. S. Brahmmananda Rao ◽  
S. Subramaniam ◽  
N. Sivaraman ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Nitric Acid ◽  
Supercritical Carbon Dioxide ◽  
Metal Ions ◽  
Acid Medium ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Nitric Acid Medium ◽  
Fluid Extraction ◽  
Organophosphorous Compounds

AbstractIn recent years, Supercritical Fluid Extraction (SFE) technique has been widely used for the extraction of metal ions. In the present study, extraction of uranium from nitric acid medium was investigated using supercritical carbon dioxide (Sc-CO

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