Efficient separation of enantiomers by preferential crystallization in two coupled vessels

AIChE Journal ◽  
2009 ◽  
Vol 55 (3) ◽  
pp. 640-649 ◽  
Author(s):  
Martin Peter Elsner ◽  
Grzegorz Ziomek ◽  
Andreas Seidel-Morgenstern
Keyword(s):  
Separation Of Enantiomers ◽  
Efficient Separation

A Novel Ion-pair Strategy for Efficient Separation of Lithium Isotopes Using Crown Ethers

2021 ◽  
pp. 118989
Author(s):  
Li Cui ◽  
Shasha Li ◽  
Jin Kang ◽  
Caixia Yin ◽  
Yanxia Guo ◽  
...  
Keyword(s):  
Crown Ethers ◽  
Ion Pair ◽  
Lithium Isotopes ◽  
Efficient Separation

Efficient trace-scale extraction method of reactor produced 199Au adequate for nuclear medicine applications

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mohamed F. Attallah ◽  
Ahmed M. Shahr El-Din ◽  
Mohamed A. Gizawy ◽  
Amal M. I. Ali
Keyword(s):  
Aqueous Media ◽  
Selective Extraction ◽  
Extraction Process ◽  
High Yield ◽  
High Recovery ◽  
Rapid Separation ◽  
Efficient Separation ◽  
Liquid Liquid Extraction ◽  
Cyanex 302 ◽  
Cyanex 923

Abstract Production of no carrier-added (NCA) 199Au through natPt(n, γ) reaction and subsequent purification using liquid-liquid extraction from other radioisotopes is studied in the context of theranostic application. Comparative separation of NCA 199Au after dissolution of activated Pt target using three Cyanex compounds (Cyanex-272, Cyanex-302 and Cyanex-923) is evaluated. The extraction process is optimized in terms of the type of extractant, the concentration of extractant, extraction time and aqueous media (HNO3, NH4OH). Among these extractants, the Cynaex-923 is efficient and promising for rapid separation and production of NCA 199Au from HNO3 by high extraction %. Selective extraction of 199Au from other Pt and Ir radioisotopes is observed. High recovery of 199Au was obtained in the case of Cyanex-923 using 0.05 M thiourea dissolved in HCl or 2 M NaOH. Our results find the Cyanex-923 as a promising extractant for efficient separation of 199Au from irradiated Pt target with high yield (99%).

scholarly journals Enhanced Photocatalytic Activity of Spherical Nd3+ Substituted ZnFe2O4 Nanoparticles

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2054
Author(s):  
Loan T. T. Nguyen ◽  
Hang T. T. Nguyen ◽  
Thieng H. Le ◽  
Lan T. H. Nguyen ◽  
Hai Q. Nguyen ◽  
...  
Keyword(s):  
Grain Size ◽  
Photocatalytic Activity ◽  
Dye Removal ◽  
Catalyst Loading ◽  
Separation Mechanism ◽  
Light Radiation ◽  
Efficient Separation ◽  
Oxidant Concentration ◽  
Znfe2o4 Nanoparticles ◽  
Removal Efficiencies

In this study, nanocrystalline ZnNdxFe2−xO4 ferrites with x = 0.0, 0.01, 0.03 and 0.05 were fabricated and used as a catalyst for dye removal potential. The effect of Nd3+ ions substitution on the structural, optical and photo-Fenton activity of ZnNdxFe2−xO4 has been investigated. The addition of Nd3+ ions caused a decrease in the grain size of ferrites, the reduction of the optical bandgap energies and thus could be well exploited for the catalytic study. The photocatalytic activity of the ferrite samples was evaluated by the degradation of Rhodamine B (RhB) in the presence of H2O2 under visible light radiation. The results indicated that the ZnNdxFe2−xO4 samples exhibited higher removal efficiencies than the pure ZnFe2O4 ferrites. The highest degradation efficiency was 98.00%, attained after 210 min using the ZnNd0.03Fe1.97O4 sample. The enhanced photocatalytic activity of the ZnFe2O4 doped with Nd3+ is explained due to the efficient separation mechanism of photoinduced electron and holes. The effect of various factors (H2O2 oxidant concentration and catalyst loading) on the degradation of RhB dye was clarified.

A simple, fast and low-cost method for the efficient separation of hydrocarbons from oily sludge

2021 ◽  
Vol 413 ◽  
pp. 125328
Author(s):  
Yasser Hamidi ◽  
Seyed Ahmad Ataei ◽  
Amir Sarrafi
Keyword(s):  
Low Cost ◽  
Oily Sludge ◽  
Efficient Separation
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