The separation of manganese from cobalt by D2EHPA

Hoh, Ying‐Chu; Chuang, Wen-Shou; Lee, Bao-Dian; Chang, Chih-Chien

doi:10.1016/0304-386x(84)90008-2

Cited by 35 publications

(13 citation statements)

References 2 publications

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“…The separation/purification of cobalt and manganese is hardly achieved by the hydrometallurgical method because cobalt and manganese have similar chemical properties. However, several methods, such as leaching by ammonia-ammonium carbonate [2,3], precipitation [4][5][6] and solvent extraction [7][8][9][10][11][12][13], have been reported for the separation/purification of cobalt and manganese.…”

Section: Introductionmentioning

confidence: 99%

Application of Co and Mn for a Co-Mn-Br or Co-Mn-C2H3O2 Petroleum Liquid Catalyst from the Cathode Material of Spent Lithium Ion Batteries by a Hydrometallurgical Route

Joo

Shin

et al. 2017

Metals

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Abstract:We investigated the preparation of CMB (cobalt-manganese-bromide) and CMA (cobaltmanganese-acetate) liquid catalysts as petroleum liquid catalysts by simultaneously recovering Co and Mn from spent Li-ion battery cathode material. To prepare the liquid catalysts, the total preparation process for the liquid catalysts consisted of physical pre-treatments, such as grinding and sieving, and chemical processes, such as leaching, solvent extraction, and stripping. In the physical pre-treatment process, over 99% of Al was removed from material with a size of less than 0.42 mm. In the chemical process, the leaching solution as obtained under the following conditions: 2 mol/L sulfuric acid, 10 vol % H 2 O 2 , 0.1 of solid/liquid ratio, and 60 • C. In the solvent extraction process, the optimum concentration of bis (2,4,4-trimethylpentyl) phosphinic acid (Cyanex 272), the equilibrium pH, the degree of saponification, the organic phase/aqueous phase ratio isotherm, and the stripping study for the extraction of Co and Mn were investigated. As a result, Co and Mn were recovered by 0.85 M Cyanex 272 with 50% saponification in counter current two extraction stages. Finally, a CMB and CMA liquid catalyst containing 33.1 g/L Co, 29.8 g/L Mn, and 168 g/L Br and 12.67 g/L Co, 12.0 g/L Mn, and 511 g/L C 2 H 3 O 2 , respectively, was produced by 2 M hydrogen bromide and 50 vol % acetic acid; it was also found that a shortage in the concentration can be compensated with cobalt and manganese salts.

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Section: Introductionmentioning

confidence: 99%

Application of Co and Mn for a Co-Mn-Br or Co-Mn-C2H3O2 Petroleum Liquid Catalyst from the Cathode Material of Spent Lithium Ion Batteries by a Hydrometallurgical Route

Joo

Shin

et al. 2017

Metals

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“…In general, the extraction reaction can be described as follows: (2) Where m is the aggregation number of D2EHPA.…”

Section: Effect Of Initial Ph Of Map Solutionmentioning

confidence: 99%

“…D2EHPA, as an effective extractant has been widely used for the extraction of zinc, beryllium, copper, vanadium, indium, gallium, cadmium, and rare earth elements [1][2][3][4][5][6][7]. The main influencing factors, such as the initial pH, the initial concentration of extractant, phase ratio and the extraction temperature are investigated to obtain the optimal process conditions for the extraction process.…”

Section: Introductionmentioning

confidence: 99%

Study on Mg2+ removal from ammonium dihydrogen phosphate solution by solvent extraction with di-2-ethylhexyl phosphoric acid

Jian

Zhou

et al. 2011

Korean J. Chem. Eng.

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The extraction of Mg 2+ from ammonium dihydrogen phosphate (MAP) solution by extractant (D2EHPA) and its mixture, including acidic extractant (HEHPEHE), alkaline extractant (TOA) and neutral extractant (TBP) respectively, is investigated. The good extraction selectivity of Mg 2+ with D2EHPA from ammonium dihydrogen phosphate solution is verified, which is found to be associated with the cation exchange and chelation capability of D2EHPA on the basis of its molecular structure. The related thermodynamic data are also obtained in terms of experimental results as follows: the extraction enthalpy is 2.659×10 −2 (J·mol −1 ·K −1 ), the free energy is 1.501×10 3 (J·mol −1 ) and the entropy is 4.441 (J·mol −1 ). Meanwhile, the major influencing factors, such as the initial pH, the initial concentration of extractant, phase ratio and the extraction temperature on the extraction ratios of Mg 2+ , are studied, and the optimal process conditions are obtained. As shown in the extraction experiments for practical MAP solution, superior grade MAP can be obtained by three levels of extraction under optimal condition.

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“…It is established (Dhadke and Ajgaonkar, 1996;Hoh et al, 1984;Ritcey and Ashbrook, 1979;Ritcey and Lucas, 1971;Sole and Hiskey, 1992;Sole et al, 2005) that the separation of these ions is feasible by the use of the solvent extraction technique using D2EHPA, EHEHPA, or PC88A, LIX reagents (hydroxyoximes), and Cyanex reagents (phosphinic acid derivatives). Although the Mn(II)-D2EHPA system has been studied by a number of workers from both equilibrium (Biswas et al, 2000;Islam and Biswas, 1981;Sarma and Reddy, 2002;Wood and Roscoe, 1970) and kinetic (Biswas and Mondal, 2003a;Biswas et al, 1996Biswas et al, , 1997Biswas et al, , 1998Biswas et al, , 2005aHughes and Biswas, 1993) viewpoints, the extraction of Mn(II) by Cyanex 272 from the mechanistic point of view has been little investigated.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and Mechanism of Forward Extraction of Mn(ii) From Sulfate-Acetato Medium by Cyanex 272 Dissolved in Kerosene Using the Single-Drop Technique

Biswas

Karmakar

Rahman

2014

Chemical Engineering Communications

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The flux of Mn(II) transfer in Mn 2þ -SO 2À 4 -Ac À ðH þ ; Na þ Þ-Cyanex 272-kerosene system was investigated using the single-drop technique and the flux method of data treatment. The empirical flux equation at 303 K is:4 ]) À1 . The activation energy (E a ) varies within 15-59 kJ=mol depending on experimental conditions. On analyzing the flux equation and with the help of E a values, it is concluded that either the extraction reaction step Mn 2þ þ A À ! MnA þ or the diffusion of reactants (or products) to (or from) the reaction site is rate controlling depending on the reaction parameters. At high pH and at intermediate pH-higher temperature regions, low E a ( 20 kJ=mol) suggests that the process is under diffusion control. But at low pH and at intermediate pH-lower temperature regions, high E a (!50 kJ=mol) suggests that the process is under chemical control. High negative DS AE value indicates that the slow extraction reaction step occurs by means of an S N 2 mechanism.

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The separation of manganese from cobalt by D2EHPA

Cited by 35 publications

References 2 publications

Application of Co and Mn for a Co-Mn-Br or Co-Mn-C2H3O2 Petroleum Liquid Catalyst from the Cathode Material of Spent Lithium Ion Batteries by a Hydrometallurgical Route

Application of Co and Mn for a Co-Mn-Br or Co-Mn-C2H3O2 Petroleum Liquid Catalyst from the Cathode Material of Spent Lithium Ion Batteries by a Hydrometallurgical Route

Study on Mg2+ removal from ammonium dihydrogen phosphate solution by solvent extraction with di-2-ethylhexyl phosphoric acid

Kinetics and Mechanism of Forward Extraction of Mn(ii) From Sulfate-Acetato Medium by Cyanex 272 Dissolved in Kerosene Using the Single-Drop Technique

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