Results 141 to 150 of about 495 (184)

Synergistic extraction of nucleobases by the combination of calixarene and D2EHPA

Separation and Purification Technology, 2005
A calix[6]arene carboxylic acid derivative incorporating tert-octyl groups at the upper rim was found to be soluble in an aliphatic organic solvent. The extraction behavior of various nucleobases was investigated with the calix[6]arene carboxylic acid derivative. In an isooctane system, neither calix[6]arene nor D2EHPA were very effective at nucleobase
Kojiro Shimojo, Masahiro Goto
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Facilitated SLM extraction of peptides with D2EHPA as a carrier

Desalination, 2004
Abstract The extraction of short peptides through a supported liquid membrane containing di-2-(ethylhexyl)phosphoric acid (D2EHPA) as a carrier was investigated. The extraction was carried out from the aqueous donor phase with pH 3 to amore acidic acceptor phase.
Anna Drapała, Piotr Wieczorek
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Studies of polyamines transport through liquid membranes with D2EHPA as a carrier

Journal of Separation Science, 2008
AbstractThe transport of polyamines through the liquid membranes with di‐2‐ethylhexyl phosphoric acid (D2EHPA) was investigated. The study was performed in three main steps: liquid–liquid extraction (LLE), bulk liquid membrane (BLM) extraction, and supported liquid membrane (SLM) extraction.
Katarzyna, Dziarkowska, Katarzyna, Koprek, Piotr P, Wieczorek   +2 more
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Microkinetics and reaction equilibria in the system ZnSO4/D2EHPA/isododecane

Hydrometallurgy, 1999
Abstract Studies have been made on the kinetics of zinc extraction for the ZnSO 4 /D2EHPA/isododecane system which is being considered as a Recommended Liquid–Liquid Extraction Test System by the European Federation of Chemical Engineering (EFCE) Working Party on Distillation, Absorption and Extraction.
H.-J. Bart, H.-P. Rousselle
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Sedimentation behavior of droplets for the reactive extraction of zinc with D2EHPA

AIChE Journal, 2009
AbstractThe sedimentation characteristics of the reactive standard test system zinc + D2EHPA are investigated in this work. Experiments with single droplets rising in a stagnant continuous phase have been carried out. The concentration of D2EHPA, zinc, and sulfuric acid as well as the diameter of the droplets are varied.
Kalem, Murat, Altunok, Mehmet Y, Pfennig, Andreas   +2 more
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Liquid–liquid extraction in microchannels with Zinc–D2EHPA system

Hydrometallurgy, 2014
Abstract Liquid–liquid extraction experiments have been carried out in two different types of microchannels using water (Zn) D2EHPA + dodecane system, a standard reactive extraction system recommended for evaluation of liquid–liquid extraction equipment.
Mayur Darekar, Nirvik Sen, K.K. Singh, S. Mukhopadhyay, K.T. Shenoy, S.K. Ghosh   +5 more
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Kinetics of extraction of uranium from phosphoric acid by D2EHPA–TBP and D2EHPA–TOPO systems using constant interfacial area stirred cell

Chemical Engineering Science, 2014
Abstract The uranium extraction kinetics with Di-2-Ethyl Hexyl Phosphoric Acid-Tri Butyl Phosphate (D2EHPA–TBP) and Di-2-Ethyl Hexyl Phosphoric Acid-Tri Octyl Phosphine Oxide (D2EHPA–TOPO) dissolved in dodecane has been investigated. The objective of the present study was to identify the reaction location, reaction regime, reaction orders with ...
O.D. Gadgil, V.H. Dalvi, K.T. Shenoy, H. Rao, S.K. Ghosh, J.B. Joshi   +5 more
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Stoichiometric relation for the extraction of the gold-thiourea complex with D2EHPA

Hydrometallurgy, 1995
Abstract The stoichiometric relation for the solvent extraction of gold from acidic thiourea solutions was studied with di(2-ethylhexyl) phosphoric acid (D2EHPA). The results showed that the gold-thiourea complex was solvated with five molecules of the D2EHPA monomer and that the extracted species were not associated with each other.
Sung-Gyu Kim, Hwa-Young Lee, Jong-Kee Oh, Eung-Cho Lee   +3 more
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Structure formation in LnCl3-H2O-D2EHPA-Solvent systems

Theoretical Foundations of Chemical Engineering, 2015
The structure formation in aqueous and organic phases during extraction of REEs by D2EHPA solutions has been studied. It has been shown that the limiting stress of shear increases; in addition, the limiting stress of shear for organic phase is far higher than that for the aqueous phase.
N. F. Kizim, E. N. Golubina, A. M. Chekmarev   +2 more
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Reactive Zinc Extraction with D2EHPA in a Kühni Miniplant Column

Chemical Engineering & Technology, 2018
AbstractReactive extraction of Zn2+ with di‐(2‐ethylhexyl) phosphoric acid (D2EHPA) was examined in a multistage countercurrent extraction column of type Kühni. Hydrodynamics and mass transfer for the reactive European Federation of Chemical Engineering (EFCE) test system were comprehensively experimentally investigated in a DN32 Kühni miniplant column.
Christian Korb, Alexander Keller, Hans-Jörg Bart   +2 more
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