Liquid - Liquid Extraction of Cerium(iv) From Salicylate Media Using N-7v-Octylaniline in Xylene as an Extractant

Kokare, Balasaheb N.; Mandhare, Aniruddha M.; Anuse, Mansing A.

doi:10.4067/s0717-97072010000400004

Cited by 16 publications

(9 citation statements)

References 20 publications

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“…The extractability of the system for Pd(II) and Pt(II) decreased in the following order of diluents: kerosene > xylene > chloroform. A similar extraction sequence has been reported previously, namely the extraction percentages of metal ions decreased with increasing diluent polarity. In addition, kerosene with a low dielectric constant increased the hydrophobicity of the organic phase.…”

Section: Resultssupporting

confidence: 83%

Separation and recovery of Pd(II) and Pt(II) from cyanide liquors of Pd-Pt flotation concentrate via solvent extraction

Chen

Huang

et al. 2017

J. Chem. Technol. Biotechnol

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BACKGROUND Thus far, separation and recovery of Pd(CN)42‐ and Pt(CN)42‐ from cyanide liquors have not been reported. In this study, the process of co‐extracting and separating Pd(II) and Pt(II) over Fe(III), Cu(I), Co(III), and Ni(I) from alkaline cyanide liquors was investigated. RESULTS The results showed that almost all Pd(II) and Pt(II) (>98.0%) could be simultaneously extracted by phenoxyethyl dimethyl palmitylammonium bromide (PDPB), whereas Fe(III), Cu(I), Co(III), and Ni(I) was below 3.0% under optimum conditions. Furthermore, Pd(CN)42‐ and Pt(CN)42‐ were separated and recovered by the two‐step stripping process. First, Pd(CN)42‐ in mixed organic phase was stripped by a 2.0 mol L−1 ammonium thiocyanate solution. The stripping percentage of Pd(CN)42‐ was >98%, whereas the stripped Pt(CN)42‐ was below 1%. Second, more than 97.5% Pt(CN)42‐ in the loaded organic phase could be stripped using 1.0 mol L−1 thiodiglycol solution. Recovery ratios for both Pd(II) and Pt(II) were above 95%. The organic phase could be reused for at least 6 cycles of extraction–stripping processes. The mechanisms of extraction reaction were deduced to be ion‐association mechanisms. CONCLUSION The process could be applied for extracting and separating palladium and platinum from the cyanide leaching liquor of the flotation concentrate. © 2016 Society of Chemical Industry

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Section: Resultssupporting

confidence: 83%

Separation and recovery of Pd(II) and Pt(II) from cyanide liquors of Pd-Pt flotation concentrate via solvent extraction

Chen

Huang

et al. 2017

J. Chem. Technol. Biotechnol

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“…The use of the variable valence properties of cerium and its stable structure is of great significance in RE separation [15]. Solvent extraction is reported to be one of the most effective techniques to extract Ce(IV) [16]. When Ce(III) was oxidized into Ce(IV), it can be easily separated from RE(III) because of high separation factor values of Ce(IV) to Th(IV) (>100) and RE(III) (>600) [17].…”

Section: Introductionmentioning

confidence: 99%

Extraction and Recovery of Cerium from Rare Earth Ore by Solvent Extraction

Li¹,

Chen²,

Zou³

2019

Cerium Oxide - Applications and Attributes

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Rare earth elements are widely found in many minerals, some of which, such as bastnaesite, monazite, and xenotime, are of great commercial value. Cerium (Ce) is the rare earth element with the highest content in light rare earth ore. Solvent extraction is the most effective and efficient method to recover and separate Ce from other light rare earth elements. After acid leaching of rare earth minerals, leaching solution was obtained, and cerium oxide of products of high purity was obtained by extraction and stripping. It is well known that Ce(IV) can be easily separated from the other RE(III) by adopting the traditional solvent extraction. Based on this principle, the clean process of oxidation roasting and Ce(IV) separation for Sichuan bastnaesite was developed. And then, a preliminary flow sheet of two-step oxidation and extraction of Ce(IV) for Bayan Obo mixed rare earth ores was further proposed.

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“…The dependence of cerium distribution ratio on TODGA, hydrogen ion, nitrate ion, cerous ion and nitric acid concentrations was investigated from the equilibrium studies and the results indicated the main extracted species to be Ce(TODGA) 2 (NO 3 ) 3 HNO 3 . A number of other extractants such as di‐(2‐ethylhexyl) 2‐ethylhexyl phosphonate (DEHEHP), tricaprylmethylammonium chloride (TCMA) and N‐ n ‐octylaniline have also been used for the extraction and separation of Ce(IV). However, these methods have some disadvantages such as interference of different ions, emulsion formation, co‐extraction and consumption of bulk amounts of reagent.…”

Section: Introductionmentioning

confidence: 99%

Comparison of hollow fiber membrane and solvent extraction techniques for extraction of cerium and preparation of ceria by stripping precipitation

Rout

Sarangi

2014

J of Chemical Tech & Biotech

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BACKGROUND The extraction of cerium by hollow fiber supported liquid membrane using tri‐octyl methyl ammonium chloride (TOMAC) as mobile carrier was studied and the result was compared with solvent extraction data. The effect of different parameters such as pH, flow rates, extractant concentration, metal ion concentration and strip solution concentration on cerium extraction was investigated. RESULTS These parameters were optimized for maximum cerium flux and were found to be: pH 1.0, 0.1 mol L−1 TOMAC, 290 mL min−1 feed solution flow rate, 150 mL min−1 strip solution flow rate and 0.9 mol L−1 H2SO4 as strip solution. The parameters were also optimized for solvent extraction study. The number of stages and Aqueous:Organic (A:O) ratio for extraction and stripping were determined from McCabe–Thiele diagrams. The extracted species was determined to be (R3NCH3)2Ce(SO4)3. The selective separation of cerium in presence of various other metal ions such as iron, copper, zinc, cobalt, nickel and manganese using a hollow fiber supported liquid membrane (HFSLM) was carried out and the separation factor values were found to be in the order α Ce/Fe <αCe/Cu < αCe/Mn < αCe/Zn < αCe/Co < αCe/Ni. Finally highly pure (99.99%) CeO2 was prepared by stripping precipitation with oxalic acid and thermal decomposition at 900°C for 1 h. CONCLUSION The efficiency of hollow fiber supported liquid membrane was greater than that of solvent extraction for the extraction of cerium for the present system. © 2014 Society of Chemical Industry

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Liquid - Liquid Extraction of Cerium(iv) From Salicylate Media Using N-7v-Octylaniline in Xylene as an Extractant

Cited by 16 publications

References 20 publications

Separation and recovery of Pd(II) and Pt(II) from cyanide liquors of Pd-Pt flotation concentrate via solvent extraction

Separation and recovery of Pd(II) and Pt(II) from cyanide liquors of Pd-Pt flotation concentrate via solvent extraction

Extraction and Recovery of Cerium from Rare Earth Ore by Solvent Extraction

Comparison of hollow fiber membrane and solvent extraction techniques for extraction of cerium and preparation of ceria by stripping precipitation

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