Process for the synthesis of flyash based zeolite-Y

Details Process for the synthesis of flyash based zeolite-Y Process for the synthesis of flyash based zeolite-Y

1998-09-08

2000-02-22

Bell, Mark L.

Chemistry of inorganic compounds

Zeolite

Synthesized from naturally occurring product

423713, 423DIG21, C01B 3924

Patent

active

060277084

ABSTRACT:
The present invention relates to a process for the synthesis of flyash based zeolite-Y (FAZ-Y), comprising grainding and mixing of flyash with caustic soda in a ratio ranging between 1:0.4-1:1.2 to obtain a fine homogenous fusion mixture, heating the said fusion mixture in an invert vessel at about 500-600.degree. C. for about 1-2 hours to obtain a fused mass, cooling, milling, and mixing of the said fused mass in distilled water for about 8-12 hours, subjecting the said slurry to hydrothermal crystallization at about 90-110.degree. C. for 8 to 12 hours to obtain FAZ-Y crystals, washing the said crystals with water and then subjecting the washed crystals to oven drying at 50-60.degree. C. to obtain the desired FAZ-Y crystals.

REFERENCES:
patent: 3702312 (1972-11-01), Wilson
patent: 4226837 (1980-10-01), Achenbach et al.
Weitkamp, J. et al., "Zeolites and Their Use in Petroleum Refining." Chemicals in the Oil Industry: Developments and Applications, (1991) pp. 326-347 (No Month).
Townsend, Rodney P., "Ion Exchange in Zeolites--Basic Principles." Chemistry and Industry, (1984) pp. 246-253 (No Month).
Dyer, Alan "Uses of Natural Zeolites." Chemistry and Industry (1984) pp. 241-245 (No Month).
Dwyer, John et al., Zeolites for Industry (Zeolites--an Introduction), Chemistry and Industry, (1984) pp. 237-240 (No Month).
Specification No. 89630, "Method of Preparing Synthetic Faujasite and Synthetic Faujasite so Prepared." Government of India, The Patent Office pp. 1-4 (Aug. 1963).

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