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Abstracts and Available Papers Presented at the
1998 International RERTR Meeting

Recovery of Molybdenum using Alumina Microspheres and
Precipitation with Selective Organic Reagents

Fátima Maria Sequeira de Carvalho e Alcídio Abrão

Departamento de Engenharia Química e Ambiental
Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP)

e-mail: fatimamc@net.ipen.sp

ABSTRACT

In this paper is presented a study for the optimization of dissolution of the UAlx plates used for irradiation and production of radiomolybdenum. The alloy is dissolved in nitric acid with mercury as catalyst. The separation and concentration of the molybdenum was achieved using a chromatographic grade alumina microspheres column. The purified eluted molybdenum is finally precipitated using one of the selective reagents: alizarine blue, a ,a ’-bypiridine and 1,10-phenanthroline. Any one of the obtained precipitate can be fired to the molybdenum trioxide. The interference of the following elements was studied: Re(VII), U(VI), Cr(VI), W(VI), V(V), Te(IV), Ti(IV), Zr(IV), Th(IV), Fe(III), Au(III),Ru(III), Al(III), Bi(III), Sb(III), Ce(IV),Pr(III), Sc(III),Y(III), Sm(III), Ba(II), Sr(II), Ni(II), Co(II), Cs(I). The molybdenum precipitates were characterized by gravimetric, CHN, TG, DTG, IR and X-ray diffraction analyses.


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Contact:
Fatima Maria Sequeira de Carvalho
Instituto de Pesquisas Energéticas e Nucleares-CNEN/SP
Travessa R, 400 - Cidade Universitária
São Paulo SP 05508-900
Brazil

Phone: 55 11 816 9339
Fax: 55 11 816 9326
Email: fatimamc@net.ipen.br

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Last modified on July 29, 2008 11:33 +0200