Extraction of Cerium (III) by Solid Extractant Impregnated with Dihexyl-N,N-Diethylcarbamoylmethylphosphonate

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Kenji Takeshita²  Mikio Kumagai²  Shiro Matsumoto¹  Yoichi Takashima² 

[1] Department of Applied Chemistry, Faculty of Engineering, Saitama University;Institute of Research and Innovation

关键词: Extraction;    Extraction Equilibrium;    Extraction Rate;    Solid Extractant;    Extraction Chromatography;    Pore Volume;    Crosslinking Degree;    Rare-Earth Element;    Bidentate Organophosphorus Compound;    Styrene-Divinylbenzene Copolymer;   

DOI  :  10.1252/jcej.27.52

来源: Maruzen Company Ltd

【 摘 要 】

References(13)Cited-By(12)A solid extractant, a porous styrene-divinylbenzene copolymer (SDB) impregnated with dihexyl-N,N-diethylearbamoylmethylphosphonate (CMP), was developed for the extraction of rare-earth elements. Solid extractants supported by SDB particles with different crosslinking and pore volume were prepared and the extraction of Ce(III) from aqueous phase containing nitrate ion was examined.SEM observation suggested that the impregnated CMP was dissolved in the SDB polymer network. The CMP content increased by use of SDB particles with lower crosslinking and higher pore volume. The stoichiometric relation for the extraction reaction was represented byCe3+ + 3NO3– + 3CMP ↔ Ce (NO3) 3·3CMPwhich was the same as that for the liquid-liquid extraction. The extraction rate increased with decrease of particle size. The rate-controlling step was the intraparticle diffusion of Ce(III) for solid extractant of diameter greater than 0.2 mm. For smaller particles, it changed to the reaction between CMP and Ce(III).

【 授权许可】

Unknown