Room‐temperature synthesis and characterization of cross‐like Pr2(C2O4)3·10H2O micro‐particles

Yin, Xiaobin; Zhang, Youjin; Fang, Zhiyong; Xu, Zhoumei; Zhu, Wei; He, Hongmei

doi:10.1002/crat.200900739

Cited by 6 publications

(3 citation statements)

References 22 publications

(21 reference statements)

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“…Hirai et al [10,11] prepared spherical Ln 2 (C 2 O 4 ) 3 Á nH 2 O (Ln¼Ce, Pr, Nd, Sm, Eu, Gd, Dy, Y and Yb) by an emulsion liquid membrane system, using Span 83 as a surfactant and EHPNA or bis (1,1,3,3-tetramethylbutyl) phosphinic acid as an extractant. Yin [12] synthesised cross-like or flower-like Pr 2 (C 2 O 4 ) 3 micro-particles at room temperature by a simple precipitation method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of lanthanum oxalate hierarchical micro-particles and nano-tubes

Zhang

Zhu

et al. 2012

Journal of Experimental Nanoscience

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Lanthanum oxalate hierarchical micro-particles and nano-tubes were synthesised on a large scale through a simple precipitation method at room temperature in the mixed solvent of water and ethanol (volume ratio 1:1), in which trisodium citrate (Na 3 Cit) was chosen as the complex agent. The lanthanum oxalate particles were characterised by X-ray diffraction, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy and Fourier transform infrared spectroscopy. The possible formation mechanisms of the La 2 (C 2 O 4) 3 Á 10H 2 O hierarchical micro-particles and nano-tubes were discussed, which disclosed that trisodium citrate and the mixed solvent had great influence on the morphology evolution of the products. The method may be applied in the synthesis of other lanthanide compounds.

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Section: Introductionmentioning

confidence: 99%

Synthesis of lanthanum oxalate hierarchical micro-particles and nano-tubes

Zhang

Zhu

et al. 2012

Journal of Experimental Nanoscience

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“…After uranium removing, an effective recovery of rare earth elements (REE s ) was obtained by oxalic acid precipitation process [16] in which the effluent solution was adjusted to pH 1.0 followed by addition to 30% oxalic acid resulted in a precipitation of REE s as oxalates. The precipitated REE oxalates were filtered, followed by addition of concentrated hydrochloric acid to dissolve it and again, add 10 % oxalic acid to obtain pure precipitate of the REE s as oxalates.…”

Section: Rare Earth Elements Recovery Processmentioning

confidence: 99%

Recovery of Some Valuable Elements from Highly Ferruginous Shale, Um Bogma Formation, Wadi Um Hamed, South Western Sinai, Egypt.

Radwan

Faheim

El‐Sheikh

et al. 2021

The Bulletin Tabbin Institute for Metallurgical Studies (TIMS)

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The present work describes a study of the acidic pug leaching technique for U-extraction in addition to some associated valuable metals from a collected technological sample of ferruginous shale from Wadi Um Hamed of Um Bogma Formation at Abu Thor locality of southwestern Sinai, Egypt. A representative sample of the ore material was found to assay 900, 700 and 400 ppm of REEs, U and Cu, respectively in addition to some major and minor oxides. Numerous steps were perform upon the studied sample to process parametric studies like sulfuric acid concentration (50-150 kg/ton), curing time (0.5-5.0 h) and curing temperature (50-150°C) in order to assess the best one giving the optimum conditions. Under the optimal conditions (150 kg/ton sulfuric acid for 4.0 h at 150°C), the first step involved Fe-removal as hydroxide from the pregnant leaching solution using pH adjustment method followed by Urecovery through sorption / desorption and precipitation steps with the help of Amberlite IRA-400-Cl (strongly basic anion exchange resin) via column method. In the third step, REEsrecovery from U-free effluent was investigated using oxalic acid precipitation process while Cu-recovery by precipitation as hydroxide with ammonia solution was tack place.

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“…The thermal decomposition of rare earth oxalates leads to the formation of fine oxide nanocrystals which is considered to be an effective and simple method for synthesizing rare earth oxide nanocrystals [9]. This aroused a great deal of attention in recent years on the synthesis of rare earth oxalate single crystals and investigations on its micro and nanostructures [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%