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Title: Recovery of uranium from acid media by macroporous bifunctional phosphinic acid resin

Abstract

The extraction of uranium from various acid media such as nitric acid, sulphuric acid, hydrochloric acid, phosphoric acid and perchloric acid by a macroporous bifunctional phosphinic acid resin (MPBPA) has been studied. The distribution coefficients for the extraction of uranium by the MPBPA resin are compared with the corresponding values reported in literature for the conventional sulphonic acid resin. The results clearly indicate the suitability of the MPBPA resin to recover uranium from different types of acid solutions of widely ranging acidities. 17 refs., 6 figs., 5 tabs.

Authors:
; ;  [1];  [2]
  1. IGCAR, Kalpakkam (India)
  2. BARC, Kalpakkam (India)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
420746
Resource Type:
Journal Article
Resource Relation:
Journal Name: Solvent Extraction and Ion Exchange; Journal Volume: 14; Journal Issue: 6; Other Information: PBD: Nov 1996
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 05 NUCLEAR FUELS; 36 MATERIALS SCIENCE; URANIUM; SOLVENT EXTRACTION; RESINS; USES; SYNTHESIS; PHOSPHORIC ACID; PHOSPHINIC ACIDS; NUCLEAR FUELS; REPROCESSING; NITRIC ACID; SULFURIC ACID; HYDROCHLORIC ACID; PERCHLORIC ACID; NUMERICAL DATA

Citation Formats

Sabharwal, K.N., Srinivasan, T.G., Rao, P.R.V., and Nandy, K.K.. Recovery of uranium from acid media by macroporous bifunctional phosphinic acid resin. United States: N. p., 1996. Web. doi:10.1080/07366299608918384.
Sabharwal, K.N., Srinivasan, T.G., Rao, P.R.V., & Nandy, K.K.. Recovery of uranium from acid media by macroporous bifunctional phosphinic acid resin. United States. doi:10.1080/07366299608918384.
Sabharwal, K.N., Srinivasan, T.G., Rao, P.R.V., and Nandy, K.K.. Fri . "Recovery of uranium from acid media by macroporous bifunctional phosphinic acid resin". United States. doi:10.1080/07366299608918384.
@article{osti_420746,
title = {Recovery of uranium from acid media by macroporous bifunctional phosphinic acid resin},
author = {Sabharwal, K.N. and Srinivasan, T.G. and Rao, P.R.V. and Nandy, K.K.},
abstractNote = {The extraction of uranium from various acid media such as nitric acid, sulphuric acid, hydrochloric acid, phosphoric acid and perchloric acid by a macroporous bifunctional phosphinic acid resin (MPBPA) has been studied. The distribution coefficients for the extraction of uranium by the MPBPA resin are compared with the corresponding values reported in literature for the conventional sulphonic acid resin. The results clearly indicate the suitability of the MPBPA resin to recover uranium from different types of acid solutions of widely ranging acidities. 17 refs., 6 figs., 5 tabs.},
doi = {10.1080/07366299608918384},
journal = {Solvent Extraction and Ion Exchange},
number = 6,
volume = 14,
place = {United States},
year = {Fri Nov 01 00:00:00 EST 1996},
month = {Fri Nov 01 00:00:00 EST 1996}
}
  • The extraction of U(VI), Th(IV) and a number of fission products from nitric acid medium by a newly synthesised macroporous bifunctional phosphinic acid resin has been studied. The extraction of uranium from sulphuric acid medium has also been studied. While the gel type phosphinic acid resins seems to pose a number of problems in practical applications, the macroporous type resins are shown to be suitable for a variety of applications where conventional ion exchange resins are of limited use. 12 refs., 5 figs., 3 tabs.
  • The extraction of U(VI), Am(III), Pu(IV), Np(IV) and Th(IV) by bifunctional phosphinic acid resin of various crosslinkages is reported as function of nitric acid concentration. From the comparison of the distribution coefficient values it is suggested that the recovery of these actinide elements from waste solutions as well as their mutual separations is possible by using phosphinic acid resin. 13 refs., 5 figs., 8 tabs.
  • Traces and small amounts of lead can be separated from gram amounts of Bi, Sn, Cd, and In by eluting these elements with 0.5 M HCl in 50% methanol from a column containing only 2.7 mL (1g) of Bio-Rad AG MP-50 macroporous cation exchange resin of 100-200 mesh particle size in the H form. A 5.4 mL (2 g) resin column separates up to 100 mg of lead. Lead can be eluted effectively with 3.0 M aqueous HCl. Separations are sharp and quantitative. In combination with flame atomic absorption spectrometry, the method has been applied for the determination of leadmore » in pure metals or chemicals of the above elements. Relative standard deviations were better than 1% for samples containing 10 ppm of lead or more. The sensitivity is less than 0.1 ppm. Relevant elution curves and results of analyses of binary synthetic mixtures and actual samples are presented. 7 references, 4 figures, 2 tables.« less
  • The distribution equilibria of gallium(III) between bis(2-ethylhexyl) phosphinic acid dissolved in toluene and acidic aqueous nitrate media has been investigated as a function of the concentration of extractant in organic phase and concentration of hydrogen ion and gallium(III) ion in aqueous phase. The extraction characteristics of bis(2-ethylhexyl) phosphinic acid are compared with that of bis(2-ethylhexyl) phosphoric acid to get further information. The stoichiometry of the extracted species is determined on the basis of slope analysis and IR spectra. Gallium is extracted by a cation exchange mechanism as GaR{sub 3} by bis(2-ethylhexyl) phosphinic acid and as GaR{sub 3}{center{underscore}dot}HR by bis(2-ethylhexyl) phosphoricmore » acid. Temperature dependence of the extraction equilibrium is examined by temperature variation method. Both extraction processes are endothermic in nature and increase in temperature is favorable.« less