TY - JOUR
T1 - Kinetics and Mechanism for Copper(II) Extraction from Sulfate Solutions with Bis(2-ethylhexyl)phosphoric Acid
AU - Juang, Ruey Shin
AU - Chang, Yaw Tsong
PY - 1993
Y1 - 1993
N2 - The rate of copper(II) extraction from 500 mol/m3 (Na,H,Cu)SO4 aqueous solution with bis(2-ethylhexyl)phosphoric acid (D2EHPA, HR) dissolved in kerosene were studied at 25 °C, using a constant interfacial area cell. It was found that, under the conditions studied, the extraction rate could be satisfactorily described by the interfacial chemical reaction model accompanied by the complex diffusion in the organic stagnant film, and the stripping rate, mainly by the diffusion process of the complex. In addition, it was deduced that the rate of complex formation of copper(II) with D2EHPA was controlled by the reaction of the adsorbed 1:2 copper-D2EHPA complex at the interface, CuR2, and the dimeric D2EHPA, [formula omitted] , in the organic phase adjacent to the interface.
AB - The rate of copper(II) extraction from 500 mol/m3 (Na,H,Cu)SO4 aqueous solution with bis(2-ethylhexyl)phosphoric acid (D2EHPA, HR) dissolved in kerosene were studied at 25 °C, using a constant interfacial area cell. It was found that, under the conditions studied, the extraction rate could be satisfactorily described by the interfacial chemical reaction model accompanied by the complex diffusion in the organic stagnant film, and the stripping rate, mainly by the diffusion process of the complex. In addition, it was deduced that the rate of complex formation of copper(II) with D2EHPA was controlled by the reaction of the adsorbed 1:2 copper-D2EHPA complex at the interface, CuR2, and the dimeric D2EHPA, [formula omitted] , in the organic phase adjacent to the interface.
UR - http://www.scopus.com/inward/record.url?scp=0027135829&partnerID=8YFLogxK
U2 - 10.1021/ie00013a027
DO - 10.1021/ie00013a027
M3 - 文章
AN - SCOPUS:0027135829
SN - 0888-5885
VL - 32
SP - 207
EP - 213
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 1
ER -