Synthesis of Zeolite A employing Amazon kaolin waste

摘要

The synthesis of zeolite A employing kaolin waste from paper coating was studied. The kaolin waste was pre-treated at 550 to 800 °C. For comparison purposes, a sample of zeolite A was also prepared using the IZA procedure. The materiais were character-ized by 27A1 MAS NMR, X-ray diffraction and scanning electron microscopy using a microprobe. Pretreatment was necessary, and the best temperatures were between 600 and 700 °C. The zeolite A formation was observed in all the prepared materiais, reaching 52% crystallinity. On the other hand, the sodalite phase and amorphous materiais were also formed.