scholarly journals The influence of temperature and pressure factors in supercritical fluid extraction for optimizing nonpolar lipid extraction from buttermilk powder

2009 ◽  
Vol 92 (2) ◽  
pp. 458-468 ◽  
Author(s):  
A.J. Spence ◽  
R. Jimenez-Flores ◽  
M. Qian ◽  
L. Goddik
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Lipid Extraction ◽  
Nonpolar Lipid ◽  
Fluid Extraction ◽  
Influence Of Temperature ◽  
Buttermilk Powder ◽  
Temperature And Pressure

Modeling of supercritical fluid extraction of flavonoids from Calycopteris floribunda leaves

2014 ◽  
Vol 68 (3) ◽  
Author(s):  
Xiong Liu ◽  
Dong-Liang Yang ◽  
Jia-Jia Liu ◽  
Kuan Xu ◽  
Guo-Hui Wu
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Extraction Process ◽  
Optimal Conditions ◽  
Fluid Extraction ◽  
Pressure Method ◽  
Organic Solvent Extraction ◽  
Drug Lead ◽  
Temperature And Pressure ◽  
Central Composite

AbstractThe aim of this study was to obtain flavonoids extracts from Calycopteris floribunda leaves using supercritical fluid extraction (SFE) with CO2 and a co-solvent. Pachypodol, a potential anticancer drug lead compound separated from the extracts, was examined. Classical organic solvent extraction (CE) with ethanol was performed to evaluate the high pressure method. HPLC analysis was introduced to interpret the differences between SFE and CE extracts in terms of antioxidant activity and the concentration of pachypodol. SFE kinetics and mathematical modeling of the overall extraction curves (OEC) were investigated. Evaluation of the models against experimental data showed that the Sovová model performs the best. The supercritical fluid extraction process was optimized using a central composite design (CCD), where temperature and pressure were adjusted. The optimal conditions of SFE were: pressure of 30 MPa and temperature of 35°C.

Lipid Extraction from Wheat Flour Using Supercritical Fluid Extraction

2004 ◽  
Vol 81 (6) ◽  
pp. 693-698 ◽  
Author(s):  
J. D. Hubbard ◽  
J. M. Downing ◽  
M. S. Ram ◽  
O. K. Chung
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Wheat Flour ◽  
Lipid Extraction ◽  
Fluid Extraction

scholarly journals Supercritical fluid extraction: Application in the food industry

2002 ◽  
Vol 56 (5) ◽  
pp. 179-190 ◽  
Author(s):  
Dejan Skala ◽  
Irena Zizovic ◽  
Sladjana Gavrancic
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Supercritical Fluids ◽  
Food Industry ◽  
Critical Pressure ◽  
Extraction Process ◽  
Fluid Extraction ◽  
Polar Solvents ◽  
Molecular Weights ◽  
Temperature And Pressure

Supercritical fluid extraction is an extraction process realized with supercritical fluids, which are at a temperature and pressure above their critical temperature and critical pressure. This process has shown to be very efficient one for the isolation of different substances of medium molecular weights and molecules of relatively low polarity. The solubility of more polar substances in supercritical fluids can be improved by the addition of small amounts of other polar solvents (cosolvent) to the supercritical fluids, which is the main solvent in extraction process. The advantage of supercritical extraction compared to other extraction procedures (the application of classical organic solvents hydrodistillation, distillation with steam) is that SFE is usually performed at moderate temperature (e.g. with SF CO2 at 40-70?C) so it can be applied for the separation of different substances which are thermally unstable and have a larger vapour pressure. All of these facts indicate that SFE is of special interest for the food and pharmaceutical industry.

scholarly journals Solubility Optimal System for Supercritical Fluid Extraction Based on a New Nonlinear Temperature-Pressure Decoupling Model Constructed with Unequal-Interval Grey Optimal Models and Peng-Robinson Models

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Binglin Li ◽  
Wen You
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Coupling Model ◽  
Optimal System ◽  
Input Output ◽  
Fluid Extraction ◽  
Optimal Method ◽  
Control Scheme ◽  
Nonlinear Temperature ◽  
Temperature And Pressure

This paper presents a new solubility optimal system to improve the efficiency of supercritical fluid extraction (SFE). The major contribution is a nonlinear temperature-pressure decoupling model constructed with unequal-interval grey optimal models (UEIGOMs) and Peng-Robinson models (PRMs). The linear parts of temperature and pressure process can be constructed with UEIGOM, respectively. The nonlinear parts of temperature and pressure process can be described by PRMs, respectively. The whole nonlinear model cannot be input-output decoupled resulting from the singularity of decoupling matrix for PRM. This problem on input-output nondecoupling can be transformed to the problem on disturbance decoupling for a class of MIMO nonlinear systems. Therefore, the whole nonlinear coupling model can be disturbance decoupled. Furthermore, solubility optimal method is presented in the paper; it can calculate the optimal pressure according to the given temperature, namely, optimal working points, to maximize solubility for SFE process. The feasibility, effectiveness, and practicality of the proposed nonlinear temperature-pressure decoupling model constructed with UEIGOMs and PRMs are verified by SFE experiments in biphenyl. Experiments using the designed solubility optimal system are carried out to demonstrate the effectiveness in control scheme, simplicity in structure, and flexibility in implementation for the proposed solubility optimal system based on a new nonlinear temperature-pressure coupling model constructed with UEIGOMs and PRMs.

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