Synthesis of faujasite y-type zeolite from fly ash

摘要

Preparation of silica enriched fly ash based zeolite-Y. Preparation of silica enriched fly ash based zeolite-Y (FAZ-Y), by: (a) forming a fine homogenous fusion mixture fly ash or pretreated fly ash with caustic soda in a weight ratio of 1:0.4 - 1:1.2; (b) heating the fusion mixture in an inert atmosphere at 500-600 deg C to obtain a fused mass; (c) cooling, milling add mixing fused mass in distilled water; (d) subjecting the slurry to hydrothermal crystallization to obtain FAZ-Y crystals; (e) treating FAZ-Y with calcium solution to obtain Ca-FAZ-Y; (f) treating Ca-FAZ-Y with ethylene diamine tetra acetic acid to obtain chelated FAZ-Y product; (g) refluxing for 8-10 hours to obtain FAZ-Y; and (h) washing and drying the product.