EXTRACTION OF SOME RARE EARTHS BY α-CHLOROALIPHATIC ACIDS

Chinese Journal of Applied Chemistry ›› 1988, Vol. 0 ›› Issue (6): 79-81.

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EXTRACTION OF SOME RARE EARTHS BY α-CHLOROALIPHATIC ACIDS

Cheng Bencheng, Xia Pengfei, Ouyang Hui

Department of Chemistry, Central South University of Technology, Changsha

Received:1988-01-18 Revised:1988-05-26 Published:1988-12-10 Online:1988-12-10

Abstract

Abstract: The extraction of rare earths (La³⁺,Nd³⁺,Sm³⁺ and Y³⁺) by α-chloroaliphatic acids (C₆, C₈, C₁₀, C₁₂) has been studied. The same extraction order was found for all four acids: Sm³⁺>Nd³⁺>La³⁺>Y³⁺. The extraction curves of α-chloroaliphatic acids shifted to about 1pH Unit lower as compared to the non-substituted one. Therefore hydrolysis and emulsification can be avoided. Y³⁺ can be separated from other rare earths when pH is low. Both the extraction rower and separation factor (β_La/y) increased with the increase of the number of carbon in α-chloroaliphatic acids.

Key words: α-Chloroaliphatic acids, Rare earths, Extraction

Cheng Bencheng, Xia Pengfei, Ouyang Hui. EXTRACTION OF SOME RARE EARTHS BY α-CHLOROALIPHATIC ACIDS[J]. Chinese Journal of Applied Chemistry, 1988, 0(6): 79-81.

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EXTRACTION OF SOME RARE EARTHS BY α-CHLOROALIPHATIC ACIDS

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