A new procedure for a zeolite synthesis from natural clays

Quimica nova

Santos, João H. Z. dos¹  Petkowicz, Diego I.¹  Rigo, Reus T.²  Pergher, Sibele B. C.² 

[1] Universidade Federal do Rio Grande do Sul;Universidade Regional Integrada do Alto Uruguai e das Missões, Erechim, Brasil

关键词: synthesis;    zeolites;    clays.;   

DOI  :  10.1590/S0100-40422009000100004

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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.

【 授权许可】

CC BY