Anion Exchange Studies. IX. Adsorbability of a Number of Metals in Hydrochloric Acid Solutions

Kraus, Kurt A.; Nelson, Frederick; Smith, Graeme C.

doi:10.1021/j150511a003

Cited by 208 publications

(82 citation statements)

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“…A comparison of these values with those obtained by Icraus et al (7) for Pd(I1) and Pt(1V) shows good agreement in the low-adsorption range where these worlcers had low degrees of loading. In the high-adsorption range where these worlcers allo\vecl the loading t o become large there is a marked divergence, their distribution coefficieilts being much lower than those given here.…”

Section: Afeasurement Of Distribution Coandcientssupporting

confidence: 75%

“…The only equilibrium data recorded co~lcer~li~lg the behavior of platinum metal complexes toward ion exchangers are those of Kraus et al (7). These worlters measured the distribution coefficients of chloroplatinate (IV) and chloropalladate (11) relative to the anion exchanger Dowex-1 in hydrochloric acid solutions.…”

mentioning

confidence: 99%

“…Kraus and his co-worlters (7,16) noted the high affinities of zinc and cadmium chloride in hydrochloric acid solutions toward anion exchangers. Preliminary experiments with 2.5 M solutions of both these salts in 9 M hydrochloric acid showed better recoveries of platinum than had been previously achieved.…”

mentioning

confidence: 99%

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Separations of the Platinum Metals by Ion Exchange

Berman¹,

McBryde²

1958

Can. J. Chem.

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Distribution coefficients for the chlorides of ruthenium, rhodium, palladium, iridi~un(II1 and IV), and platinu~n have been deternli~led between the anion exchanger Amberlite IRA-400 and hydrochloric acid solutions of various molarities. Separations of various combinations'of rhodium, iridium, palladiu~ll, and platinum in amounts of 0.5 mg. or less are described. When, in the course of these separations, the four metals are present together, special procedures are required to ensure conlplete recovery of platinu~l~.There have been several attempts to employ ion exchange in the separation of the platinum metals, but only a limited degree of success has been achieved. MacNevin and Cruinmett (1) suggested that a separation of rhodium, iridium, palladium, and platiilum might be possible owing to the graded stabilities of the chloride and ammine complexes of these metals, but presented no experimental data. Another report by the same authors (2) elaborated on a separation of iridium from palladium achieved by converting the palladium to a cationic diammine, leaving the iridium as an anion, and separating the two on this basis. Stevenson et al. (3) submitted a note on the separation of the four metals on the cation exchanger Dowex-50, based on the formation of perchlorates of these metals by fuming their solutioils with perchloric acid. No data were given, but this separation is of questionable value because of the inability to keep even milligram quantities of platinum and iridium from precipitating in this medium. Blasius and Wachtel (4) achieved separations of from the other three metals by adsorbing the platinum complex on the anion exchanger Permutit-ES in the hydroxide form. The other three metals were eluted by a solution of sodium hydroxide, and the platinum recovered by elution with nitric acid. WIacNevin and McI

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Section: Afeasurement Of Distribution Coandcientssupporting

confidence: 75%

mentioning

confidence: 99%

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Separations of the Platinum Metals by Ion Exchange

Berman¹,

McBryde²

1958

Can. J. Chem.

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“…There have been some previous studies reported on the stability of chloride complexes of gallium. The stability constants K n of [GaCln] (3−n)+ : lg K 1 = −0.6, lg K 2 = −1.7, lg K 3 = −2.2, and lg K 4 = 1.3 of the reaction Ga 3+ + nCl − = [GaCln] (3−n)+ were calculated by Sillén and Martell (12) on the basis of the Kraus et al (13) paper. Latter, the values of K n were calculated by Mihallov; (14) lg K s : = −0.64, lg K 2 = −2.18, lg K 3 = 3.90, and lg K 4 = −5.74.…”

Section: Resultsmentioning

confidence: 99%

Thermodynamics of the ion pair [GaCl]2+at temperatures from 278.15 K to 318.15 K

Yang

Zhang

Han

et al. 2002

The Journal of Chemical Thermodynamics

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“…2 The sorption of elements from hydrochloric acid solutions on strong base anion-exchange resins. 8,[28][29][30][31][32][33][34][35][36][37] The separation procedure was devised based on Fig. 2.…”

Section: Experimental Methodsmentioning

confidence: 99%

Modeling of Elution Curves in Preparative Chromatography Using Anion-Exchange Resin for Cobalt Purification

2009

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There have been many studies on the modeling of elution and breakthrough curves of ion-exchange chromatography. A precise representation of elution curves using an appropriate mathematical model is significant for the application and expansion of ion-exchange chromatography. The significance of precise modeling particularly increases when the yield and purity of the product are important. However, no previous studies have proposed a model that can perfectly represent experimental elution curves. We investigated the purification of various metals by anion-exchange separation and determined an optimum condition for purification of an element through trial and error. An appropriate model replicating the elution curves accurately is greatly needed to reduce the testing phase. Consequently, this paper proposes a novel model called the plate theory in multi-path mode, in which three virtual paths are assumed. The results show that this model well represents the experimental elution curves. In addition, the model was validated by comparing the distribution coefficients obtained from the fitting results with those determined by previously reported batch experiments.

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Anion Exchange Studies. IX. Adsorbability of a Number of Metals in Hydrochloric Acid Solutions

Cited by 208 publications

References 0 publications

Separations of the Platinum Metals by Ion Exchange

Separations of the Platinum Metals by Ion Exchange

Thermodynamics of the ion pair [GaCl]2+at temperatures from 278.15 K to 318.15 K

Modeling of Elution Curves in Preparative Chromatography Using Anion-Exchange Resin for Cobalt Purification

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