EXTRACTION OF CERIUM (III) BY SOLID EXTRACTANT IMPREGNATED WITH DIHEXYL-N, N-DIETHYLCARBAMOYLMETHYLPHOSPHONATE
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概要
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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).
- 社団法人 化学工学会の論文
- 1994-02-20
著者
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Takeshita Kenji
Nuclear Chemistry And Chemical Engineering Center Institute Of Research And Innovation
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KUMAGAI Mikio
Institute of Research and Innovation
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TAKASHIMA Yoichi
Nuclear Chemistry and Chemical Engineering Center, Institute of Research and Innovation
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MATSUMOTO Shiro
Department of Applied Chemistry, Saitama University
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TAKESHITA Kenji
Institute of Research and Innovation
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TAKASHIMA Yoichi
Institute of Research and Innovation
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Takashima Y
Nuclear Chemistry And Chemical Engineering Center Institute Of Research And Innovation
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Takashima Yoichi
Institute Of Research & Innovation
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Matsumoto Shiro
Division Of Materials Science Graduate School Of Science And Engineering Saitama University
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Matsumoto Shiro
Department of Applied Chemistry Saitama University
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