Crystallization field study for the formation of single phase sodium clinoptilolite: Batch composition, seed and temperature effects

Guevenir O., KALIPÇILAR H., Culfaz A.

CRYSTAL RESEARCH AND TECHNOLOGY, vol.44, no.3, pp.293-299, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 3
  • Publication Date: 2009
  • Doi Number: 10.1002/crat.200800358
  • Journal Name: CRYSTAL RESEARCH AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.293-299
  • Keywords: clinoptilolite, crystallization, seeded growth, ELECTRON-SPIN-RESONANCE, SYNTHETIC CLINOPTILOLITE, HYDROTHERMAL SYNTHESIS, ADSORBATE INTERACTIONS, MOLECULAR-SIEVES, ECHO MODULATION, ZEOLITES
  • Middle East Technical University Affiliated: Yes

Abstract

Although clinoptilolite is the most abundant zeolite mineral in nature, its synthesis under laboratory conditions has been difficult. A partial crystallization field study was done for the synthesis of clinoptilolite based on a nominal batch composition of 2.1Na(2)O:Al2O3:10Si(2)O:110H(2)O to delineate the limits of composition and temperature within which sodium clinoptilolite can be produced as a single phase in high yields. Effects of temperature, SiO2/Al2O3 molar ratio in the batch composition, and the use of different raw materials in batch preparation were studied. The need for the use of seed crystals for reproducible synthesis of clinoptilolite was established. (c) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim