CHROMATOGRAPHIC SEPARATION OF RARE EARTHS BY MEANS OF PAPER TREATED WITH THE LIQUID CATION EXCHANGER DI-(2-ETHYLHEXYL) ORTHOSPHOSPHORIC ACID

Journal Article · Fri Jun 01 04:00:00 EDT 1962 · J. Chromatog.

DOI:https://doi.org/10.1016/S0021-9673(01)99254-4· OSTI ID:4818744

Cerrai, E; Testa, C

The chromatographic behavior of rare earths on paper treated with di-(2- ethylhexyl) phosphoric acid (HDEHP) was investigated. The quantity log (I/R/sub F--I)/ was related to: the atomic number of the element, the molarity of the acid used as eluent, the molarity of the solution with which the paper is treated, and the operating temperatures. Under the same conditions, the RF values increase as the atomic number decreases; furthermore, for a given element, RF increases with the molarity of the eluting acid (HCl), with the operating temperature and, finally, it decreases with the concentration of HDEHP on the paper. Some examples are given of the chromatographic separation of rare earths from each other and from Y, Sc, Th, U, Fe, Al, and Zr. In addition to paper treated with HDEHP alone, strips were investigated on which tri-n-octylamine (TNOA) was fixed on a small part of the surface, and HDEHP on the remaining surface. The possibility of separating large amounts of rare earths by means of columns filled with HDEHP-treated cellulose powder or with mixed beds is anticipated. (auth)

• Research Organization: CISE, Milan
• NSA Number: NSA-16-027139
• OSTI ID: 4818744
• Journal Information: J. Chromatog., Journal Name: J. Chromatog. Vol. Vol: 8
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
ALKYL RADICALS
ALUMINUM COMPOUNDS
AMINES
ATOMS
CATIONS
CELLULOSE
CHEMISTRY
CHROMATOGRAPHY
CONCENTRATION
DEHPA
ELECTRIC CHARGES
ETHYL RADICALS
GRAIN SIZE
HEXYL RADICALS
HYDROCHLORIC ACID
ION EXCHANGE
ION EXCHANGE MATERIALS
IRON COMPOUNDS
LIQUIDS
MIXING
ORGANIC PHOSPHORUS COMPOUNDS
PAPER
PHOSPHORIC ACID
POWDERS
QUANTITY RATIO
RADIO WAVES
RARE EARTHS
SCANDIUM COMPOUNDS
SEPARATION PROCESSES
SOLUTIONS
TEMPERATURE
TESTING
THORIUM COMPOUNDS
URANIUM COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS