Hydrothermal Synthesis of Zeolite Crystals Using Natural Scolecite

✍ Scribed by Prof. M. S. Joshi; A. L. Choudhari; R. G. Kanitkar

• Publisher: John Wiley and Sons
• Year: 1986
• Tongue: English
• Weight: 616 KB
• Volume: 21
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.2170210602

✦ Synopsis

Hydrothermal Synthesis of Zeolite Crystals Using Natural Scolecite

Natural scolecitc is converted into aiialciiiie type zeolite by hydiwtherriial iiiethod at 180 "C u t autogeneous pressure for 24 to 160 hours growth runs. Mordeiiite is detected in the final product. Cube and spheroid crystals of the products are illustrated and described. Crystals synthesized are characterized by X-ray diffraction, infrared spectroscopy EDAX and scanning electron microscopy. Particle size is estimated as 20-60 microns, induction period for nucleation as 12 hrs, and lattice parameter of cube crystals as 13.70 A.

Mechanism of growth, influence of anions and duration of growth etc. are discussed. It is established that the crystals grow in the system Ntl,O-A1,O~-SiOz-H,O.