Um novo procedimento de síntese da zeólita A empregando argilas naturais
AUTOR(ES)
Rigo, Reus T., Pergher, Sibele B. C., Petkowicz, Diego I., Santos, João H. Z. dos
FONTE
Química Nova
DATA DE PUBLICAÇÃO
2009
RESUMO
This work proposes the synthesis of zeolite A by IZA standard proceedures starting from a natural clay. The clay was used in its natural form and after calcination at 900ºC. The resulting materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and porosity analysis by nitrogen adsorption. Results showed low surface area for Na-A zeolite in sodium form, but a higher one in CaA based on the nitrogen accessibility. The presence of cubic crystals for the A phase was observed in the SEM micrographies. The new procedure starting from natural clay favors the formation of sodalite while that using the calcinated clay gives A.
