Supercritical fluid extraction of chamomile flower heads: Comparison with conventional extraction, kinetics and scale-up

2007 ◽  
Vol 43 (2) ◽  
pp. 192-198 ◽  
Author(s):  
Petra Kotnik ◽  
Mojca Škerget ◽  
Željko Knez
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Scale Up ◽  
Extraction Kinetics ◽  
Fluid Extraction ◽  
Conventional Extraction ◽  
Chamomile Flower

scholarly journals Supercritical fluid extraction of grape seed: Process scale-up, extract chemical composition and economic evaluation

2012 ◽  
Vol 109 (2) ◽  
pp. 249-257 ◽  
Author(s):  
Juliana M. Prado ◽  
Irede Dalmolin ◽  
Natália D.D. Carareto ◽  
Rodrigo C. Basso ◽  
Antonio J.A. Meirelles ◽  
...  
Keyword(s):  
Economic Evaluation ◽  
Chemical Composition ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Scale Up ◽  
Grape Seed ◽  
Fluid Extraction ◽  
Process Scale Up ◽  
Process Scale

scholarly journals Supercritical Fluid Extraction Kinetics of Cherry Seed Oil: Kinetics Modeling and ANN Optimization

Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1513
Author(s):  
Ivana Dimić ◽  
Lato Pezo ◽  
Dušan Rakić ◽  
Nemanja Teslić ◽  
Zoran Zeković ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Flow Rate ◽  
Seed Oil ◽  
Statistical Tests ◽  
Initial Slope ◽  
Extraction Kinetics ◽  
Fluid Extraction ◽  
Kinetics Modeling

This study was primarily focused on the supercritical fluid extraction (SFE) of cherry seed oil and the optimization of the process using sequential extraction kinetics modeling and artificial neural networks (ANN). The SFE study was organized according to Box-Behnken design of experiment, with additional runs. Pressure, temperature and flow rate were chosen as independent variables. Five well known empirical kinetic models and three mass-transfer kinetics models based on the Sovová’s solution of SFE equations were successfully applied for kinetics modeling. The developed mass-transfer models exhibited better fit of experimental data, according to the calculated statistical tests (R2, SSE and AARD). The initial slope of the SFE curve was evaluated as an output variable in the ANN optimization. The obtained results suggested that it is advisable to lead SFE process at an increased pressure and CO2 flow rate with lower temperature and particle size values to reach a maximal initial slope.

scholarly journals Supercritical fluid extraction of hops

2007 ◽  
Vol 72 (1) ◽  
pp. 81-87 ◽  
Author(s):  
Zoran Zekovic ◽  
Ivana Pfaf-Sovljanski ◽  
Olgica Grujic
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
The Other ◽  
Second Step ◽  
Qualitative And Quantitative Analysis ◽  
Extraction Kinetics ◽  
Fluid Extraction ◽  
Qualitative And Quantitative ◽  
Co2 Flow

Five cultivars of hop were extracted by the method of supercritical fluid extraction using carbon dioxide (SFE-CO2) as extractant. The extraction (50 g of hop sample using a CO2 flow rate of 97.725 L/h) was done in the two steps: 1. extraction at 150 bar and 40?C for 2.5 h (sample of series A was obtained) and, after that, the same sample of hop was extracted in the second step: 2. extraction at 300 bar and 40?C for 2.5 h (sample of series B was obtained). The Magnum cultivar was chosen for the investigation of the extraction kinetics. For the qualitative and quantitative analysis of the obtained hop extracts, the GC-MS method was used. Two of four the most common compounds of hop aroma (?-humulene and ?-caryophyllene) were detected in samples of series A. In addition, isomerized ?-acids and a high content of ?-acids were detected. The ?-acids content in the samples of series B was the highest in the extract of the Magnum cultivar (it is a bitter variety of hop). The low contents of ?-acids in all the other hop samples resulted in extracts with low ?-acids content, i.e., that contents were under the prescribed ?-acids content.

Supercritical Fluid Extraction of Poultry Tissues Containing Incurred Pesticide Residues

1993 ◽  
Vol 76 (4) ◽  
pp. 888-892 ◽  
Author(s):  
Janet M Snyder ◽  
Jerry W King ◽  
Loyd D Rowe ◽  
Julie A Woerner
Keyword(s):  
Carbon Dioxide ◽  
Solvent Extraction ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Breast Tissue ◽  
Extraction Methods ◽  
Fluid Extraction ◽  
Peritoneal Tissue ◽  
Conventional Extraction ◽  
Poultry Tissues

Abstract A method using supercritical carbon dioxide to extract fat from poultry tissue was developed. Tissues used in this study were peritoneal fat, breast tissue, leg and thigh tissue, and liver from chickens fed rations containing heptachlor, dieldrin, and endrin. The fat was isolated from the peritoneal tissue by supercritical fluid extraction (SFE) and by thermal rendering. The fat was removed from the breast tissue, leg and thigh tissue, and liver by SFE and solvent extraction. The results indicate that recoveries of organochlorine pesticide from the peritoneal, breast, leg, and thigh tissues by SFE extraction are equivalent to those obtained by conventional extraction methods. The pesticide recoveries by SFE extraction of the liver were higher than those obtained by solvent extraction.

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