Optimization of the operative conditions for heteropolyacids synthesis through ion exchange

Materials Research

Silvana Raquel Matkovic¹  Graciela Manuela Valle¹  Laura Estefania Briand¹ 

[1] ,Universidad Nacional de La Plata Centro de Investigación y Desarrollo en Ciencias Aplicadas Dr. J. J. Ronco Buenos Aires,Argentina

关键词: Wells-Dawson;    heteropolyacid;    POM;    HPA;   

DOI  :  10.1590/S1516-14392005000300022

来源: SciELO

【 摘 要 】

Phospho-tungstic and phospho-molybdic Wells-Dawson heteropolyacids, H6P2W18O62 .xH2O and H6P2Mo18O62 .xH2O respectively, were synthesized through ion exchange with a higher yield (~ 90%) than the conventional organic route (~ 70%). Pure, non-degraded heteropolyacids are obtained when the corresponding ammonium salt [(NH4)6P2W18 O62.13H2O or (NH4)6P2Mo18 O62.12H2O] is kept in contact with an acid resin [about (1:0.8) salt:resin weight ratio] up to three days. The use of an organic media instead of an aqueous media greatly favors the completeness of the exchange.

【 授权许可】

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