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Ion exchange in the synthetic gismondine, zeolite MAP

Citation

Allen, S and Carr, S and Chapple, A and Dyer, A and Heywood, BR, Ion exchange in the synthetic gismondine, zeolite MAP, Physical Chemistry Chemical Physics, 4, (11) pp. 2409-2415. ISSN 1463-9076 (2002) [Refereed Article]

Copyright Statement

Copyright 2002 The Owner Societies

DOI: doi:10.1039/b111490p

Abstract

Ion exchange has been studied in zeolite MAP, a synthetic gismondine used as a commercial detergent builder. The zeolite was fully characterized and shown to be a stable phase throughout the three year period of study. The ions pairs examined were; Na ↔ Li,K,Rb,Cs and Na ↔ 1/2 Mg,Ca,Sr,Ba. All cation forms prepared were examined by powder X-ray diffraction (PXRD), magic-angle spinning (MAS) NMR and thermal analysis. When cation exchanges were shown to be reversible their isotherms were analysed to produce thermodynamic data. The values were then compared with literature values obtained for similar zeolite exchanges. Structural data (PXRD, MASNMR) showed that cation exchange often caused changes in unit cell symmetry as well as the creation of immiscible phases rich in the end-members when calcium and strontium were the in-going cations.

Item Details

Item Type:Refereed Article
Keywords:calcium, cation, detergent, strontium, zeolite, ion exchange, isotherm, nuclear magnetic resonance, thermal analysis, thermodynamics, X ray diffraction
Research Division:Chemical Sciences
Research Group:Physical Chemistry (incl. Structural)
Research Field:Structural Chemistry and Spectroscopy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Heywood, BR (Professor Brigid Heywood)
ID Code:104533
Year Published:2002
Web of Science® Times Cited:14
Deposited By:Research Division
Deposited On:2015-11-13
Last Modified:2016-01-20
Downloads:0

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