JOSE ANTONIO SENEDA

JOSE ANTONIO SENEDA

(Fonte: Lattes)

Resumo

Possui Doutorado em Tecnologia Nuclear pela Universidade de São Paulo (2006). Atualmente é Professor Colaborador do Instituto de Pesquisas Energéticas e Nucleares-CNEN/SP. Tem experiência na área de Engenharia Química e Nuclear, atuando principalmente em P&D&E de processos de troca iônica para separação, recuperação e descontaminação de Urânio, Tório e Terras Raras, além de Energias Renováveis com alinhamento em Gestão de Risco destas áreas.(Texto extraído do Currículo Lattes em 14 out. 2021)

Lattes

Página do item completo

Resultados de Busca

Agora exibindo 1 - 10 de 18

Preparation of neodymium acetate for use in nuclear area and nanotechnology
2017 - QUEIROZ, C.A.S.; PEDREIRA FILHO, W.R.; SENEDA, J.A.
Neodymium and its compounds are being increasingly applied in the manufacture of new materials. In nuclear area neodymium isotopes are used in a variety of scientific applications. Nd-142 has been used to produce short-lived Tm and Yb isotopes. Nd-146 has been suggested to produce Pm-147 and Nd-150 has been used to study double beta decay. Due to the several modern applications using nanomaterials, more and more highly rare earth compounds have been demanded. The researches at IPEN uses the experience gained in rare earth separation for the preparation of some pure acetates, purity > 99.9% for application in nanotechnology research. A simple and economical chemical process to obtaining neodymium acetate of high purity is studied. The raw material in the form of mixed rare earths carbonate comes from Brazilian monazite. It is used the technique of strong cationic exchange resin, proper to water treatment, to the neodymium's fractionation and it is achieved a purity of 99.9% in Nd2O3 and yield greater than or equal 80%, with the elution of rare earths by EDTA solution in pH controlled. The complex of EDTA-neodymium is transformed in neodymium oxide, subsequently the oxide is dissolved in acetic acid to obtain the neodymium acetate. The solid salt was characterized via molecular absorption spectrophotometry, mass spectrometry, thermal analysis, chemical analysis and X ray diffraction. In summary the analytical data collected allowed to conclude that the stoichiometric formula for the neodymium acetate prepared is Nd(CH 3COOH)3.1.5H2O.
Obtaining pure praseodymium acetate to use in researches and development
2010 - QUEIROZ, CARLOS A. da S.; ROCHA, SORAYA M.R. da; PEDREIRA, WALTER R.; SENEDA, JOSE A.; LOBO, RAQUEL M.; S. FILHO, WALTER
This paper presents a simple and economical procedure to obtain high purity praseodymium acetate. The raw material in the form of mixed rare earths carbonate comes from a industrial separation of rare earths, thorium and uranium in the brasilian monazite. It is used the tecnique of strong cation exchange resin, proper to water treatment, to the praseodymium's fractionation and it is achieved a purity of 99.9% in Pr6O11 and yield greater than or equal 60%, with the elution of rare earths by EDTA solution in pH controlled. The complex of EDTA-praseodymium is transformed in praseodymium oxide, subsequently the oxide is dissolved in acetic acid to obtain the praseodymium acetate. The molecular absorption spectrophotometry tecnique is used to monitoring the praseodymium content during the process and mass spectrometry to certification the purity of the praseodymium acetate. The typical praseodymium acetate obtained presents the followings contaminants in micrograms per gram: Sc(18.20±0.22); Y (20.20 ± 0.20); La (6.75 ± 0.81); Ce (26.10 ± 0.70); Nd (3.31 ± 0.63); Sm (18.30 ± 0.80); Eu (17.00 ± 0.90); Gd (19.40 ± 0.40); Tb (16.30 ± 0.50); Dy (16.90 ± 0.50), Ho(17.90 ± 0.10); Er (18.40 ± 0.70); Tm (16.90 ± 0.10); Yb (17.60 ± 0.60); Lu (17.70 ± 0.50). The high purity praseodymium acetate comes being applied, replacing the imported product, in research and development area on rare earth catalysts.
Advanced mass spectrometric applied to determinated of composition in lead (Pb-208) from residues of thorium facilities
2007 - SENEDA, JOSE A.; QUEIROZ, CARLOS A. da S.; RIZZO, SORAYA M. da R.; DIAS, MAURO S.; KAKAZU, MAURICIO H.; ABRAO, ALCIDIO
Characterization of lanthanium oxide on the thermal stability of gamma alumina catalyst supports
2007 - ROCHA, S.M.R.; VASCONCELLOS, M.E. de; QUEIROZ, C.A.S.; FORBICINI, C.A.L.G.O.; SENEDA, J.A.; PEDREIRA, W.R.
Obtencao experimental de acetato de praseodimio de alta pureza a partir de carbonatos mistos de terras raras
2010 - QUEIROZ, C.A. da S.; ROCHA, S.M.R. da; PEDREIRA, W.R.; SENEDA, J.A.; LOBO, R.M.; FILHO, W.S.
High purity samarium oxide from mixed rare earth carbonates
2013 - QUEIROZ, CARLOS A. da S.; PEDREIRA FILHO, WALTER dos R.; SENEDA, JOSE A.; VASCONCELLOS, MARI E. de
Produção de lantânio de alta pureza para aplicação em P&D
2002 - VASCONCELLOS, M.E.; QUEIROZ, C.A.S.; ROCHA, S.M.R.; SENEDA, J.A.; PEDREIRA FILHO, W.R.; SARKIS, J.E.S.; FORBICINI, C.A.L.G.O.; ABRAO, A.
High purity samarium acetate from mixed rare earth carbonates
2013 - QUEIROZ, CARLOS A. da S.; SENEDA, JOSE A.; PEDREIRA, WALTER dos R.; VASCONCELLOS, MARI E. de
High purity neodymium acetate from mixed rare earth carbonates
2011 - QUEIROZ, CARLOS A. da S.; ROCHA, SORAYA M.R. da; PEDREIRA, WALTER dos R.; VASCONCELLOS, MARI E. de; LOBO, RAQUEL M.; SENEDA, JOSE A.
Synthesis of advanced chemically bonded ceramics for solidification of radioactive wastes
2011 - SENEDA, JOSE A.; DELLAMANO, JOSE C.; QUEIROZ, CARLOS A.S.; GENOVA, LUIS A.; ROCHA, SORAYA M.R. da; VICENTE, ROBERTO