Separation of Ce(Ⅳ) and RE(Ⅲ) with Hollow Fiber Membrane based Extraction

Abstract

Abstract: Separation of Ce(Ⅳ) and RE(Ⅲ) was investigated by hollow fiber membrane based extraction with contercurrent recirculating operation. The mass transfer coefficients of Ce(Ⅳ) and RE(Ⅲ) and the effective factors to them were tested. The results show the mass transfer coefficient of Ce(Ⅳ) is larger than that of RE(Ⅲ), and their mass transfer mechanism is different. The mass transfer of Ce(Ⅳ) was controlled by the resistance in water critical layer due to its more rapid interfacial reaction rate and larger distribution coefficient, which was different from RE(Ⅲ) mass transfer with a slow interfacial reaction rate and small distribution coefficient. Ce(Ⅳ) was separated from the mixed solution of Ce(Ⅳ) and RE(Ⅲ) by means of the difference of their mass transfer rates.

Key words: Hollow fiber, Extraction, Rare earth separation, N1923

CLC Number:

O658.2

TrendMD:

WANG Yu-Jie, ZHANG Shu-Min, LI De-Qian . Separation of Ce(Ⅳ) and RE(Ⅲ) with Hollow Fiber Membrane based Extraction[J]. Chem. J. Chinese Universities, 1998, 19(6): 970.

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Separation of Ce(Ⅳ) and RE(Ⅲ) with Hollow Fiber Membrane based Extraction

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