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Ion exchange in the synthetic gismondine, zeolite MAP
journal contribution
posted on 2023-05-18, 14:23 authored by Allen, S, Carr, S, Chapple, A, Dyer, A, Heywood, BRIon 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.
History
Publication title
Physical Chemistry Chemical PhysicsVolume
4Issue
11Pagination
2409-2415ISSN
1463-9076Publisher
Royal Soc ChemistryPlace of publication
Thomas Graham House, Science Park, Milton Rd, Cambridge, England, Cambs, Cb4 0WfRights statement
Copyright 2002 The Owner SocietiesRepository Status
- Restricted