Removal of phosphorus-based extractant contamination from lutetium oxalate produced by precipitation stripping From: Metallurgical and Materials Transactions | Date: February 1, 2002| Author: McLain, Sylvia; Schweitzer, George K; Smith, Peter M | Copyright Minerals, Metals & Materials Society and ASM International Feb 2002. Provided by ProQuest LLC.Copyright information

The lanthanide elements have many technological applications. The majority of these applications require that the lanthanide, either as a compound or as the free metal, be of very high purity, 99.9 to 99.999 pct. Solvent extraction is the most widely used technique for the separation and purification of the lanthanide elements. Two common extractants that are used in the extraction are di-2-ethylhexyl phosphoric acid (DEHPA) and mono-2-ethylhexyl-(2-ethylhexyl) phosphonic acid (MEHEHP). Typic...

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