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Extraction and enrichment of low-concentration rare earths from the in-situ leaching solutions of ion-absorbing type rare-earth ores using bubbling organic liquid membrane with un-saponified P507 was investigated. Experimental results revealed that saponification of P507 extractant are unnecessary for extraction of rare earths using bubbling organic liquid membrane. The equilibrium pH of the aqueous...
Pure calcium alginate (CA), CA composite beads containing 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (CA-P507), core–shell structural calcium silicate-alginate (CS-A) and CS-A containing P507 (CS-A-P507) have been synthesized and their adsorption properties towards rare earths (III) have been investigated. The order of their adsorption capacities is as follows: CA-P507 > CS-A-P507 > CA > CS-A...
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