Characteristics of Bis [2-Ethylhexyl] Orthophosphoric Acid Chromatographic Columns for Rare-Earth Separation

Autor:	Hwa-Sheng Cheng, Ching-Yü Lin, Chiung-Huei Ke, John W. Winchester
Rok vydání:	1963
Předmět:	Solvent chemistry.chemical_compound Cerium Chromatography Silanes chemistry Praseodymium Elution Lanthanum chemistry.chemical_element Hydrochloric acid General Chemistry Ascorbic acid
Zdroj:	Journal of the Chinese Chemical Society. 10:80-85
ISSN:	0009-4536
DOI:	10.1002/jccs.196300010
Popis:	Separation factors for La, Ce, and Pr were measured precisely on columns of bis(2-ethylhexyl) orthophosphoric acid (DEP) supported on diatomaceous silica made hydrophobic with dimethyldicltlorosilane. Column behavior is related to the properties of DEP when used as a solvent extractart, and the column method is a useful one for studying a solvent extraction system with great precision and reproducibility. Separation factors measured are Ce/ La = 2.8 plus or minus 0.1 and Pr/Ce = 2.7 plus or minus 0.1. The dependence of elution volume on HCl activity was found to be approximately 2.5 power in the range 0.2--0.3 M HCl. (auth)
Databáze:	OpenAIRE
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