Equilibrium studies on enantioselective extraction of oxybutynin enantiomers by hydrophilic β-cyclodextrin derivatives

AIChE Journal ◽  
2011 ◽  
Vol 57 (11) ◽  
pp. 3027-3036 ◽  
Author(s):  
Kewen Tang ◽  
Panliang Zhang ◽  
Chunyue Pan ◽  
Hongjian Li
Keyword(s):  
Cyclodextrin Derivatives ◽  
Equilibrium Studies ◽  
Enantioselective Extraction

Enantioselective extraction of hydrophilic 2-chloromandelic acid enantiomers by hydroxypropyl-β-cyclodextrin: experiments and modeling

2013 ◽  
Vol 67 (2) ◽  
Author(s):  
Cong-Shan Zhou ◽  
Ping Xu ◽  
Ke-Wen Tang ◽  
Xin-Yu Jiang ◽  
Tao Yang ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Extraction Efficiency ◽  
Reactive Extraction ◽  
Phase Reaction ◽  
Important Process ◽  
Process Variables ◽  
Model Data ◽  
Cyclodextrin Derivatives ◽  
Enantioselective Extraction ◽  
Extraction Model

AbstractEnantioselective extraction of hydrophilic 2-chloromandelic acid (CMA) enantiomers from organic to aqueous phase with hydroxypropyl-β-cyclodextrin (HP-β-CD) as the selector was investigated. Equilibrium of the extraction system was modeled using a reactive extraction model with a homogeneous aqueous phase reaction. The influence of important process variables on the extraction efficiency, such as the type of the organic solvent and β-cyclodextrin derivatives (β-CDs), concentration of the selector, pH and temperature, was investigated by experiment and modeling. Important parameters of this model were determined experimentally. Results showed that the experimental data agree with the model prediction perfectly and the model was further applied to accurately predict the extraction efficiency influenced simultaneously by pH and the concentration of HP-β-CD. Combining the experiment and the model data, the best extraction conditions were: pH of 2.5, HP-β-CD concentration of 0.05 mol L−1, and temperature of 5°C, providing the enantioselectivity of 1.285 and the performance factor (pf) of 0.011.

ADSORPTIVE REMOVAL OF Cu (II) IONS BY DATE PITS: KINETIC AND EQUILIBRIUM STUDIES

2016 ◽  
Vol 15 (12) ◽  
pp. 2719-2732 ◽  
Author(s):  
Tarek E. Khalil ◽  
Hossam Altaher ◽  
Reda Abubeah
Keyword(s):  
Equilibrium Studies ◽  
Adsorptive Removal ◽  
Date Pits

REMOVAL OF ACID BLACK DYE BY PUMICE STONE AS A LOW COST ADSORBENT: KINETIC, THERMODYNAMIC AND EQUILIBRIUM STUDIES

2013 ◽  
Vol 12 (11) ◽  
pp. 2137-2147 ◽  
Author(s):  
Mohammad Noori Sepehr ◽  
Mohammad Reza Samarghandi ◽  
Mansur Zarrabi ◽  
Abdeltif Amrane ◽  
Mohammad Mahdi Soori
Keyword(s):  
Low Cost ◽  
Equilibrium Studies ◽  
Pumice Stone
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