Isomerization of 1-butene on silver and thallium 12-tungstophosphate : the effect of the cation on acid strength distributions

Substitution of the protons in 12-tungstophosphoric acid by monovalent cations of the Groups 1B and 3B, in particular Ag+ and Tl+, respectively, produces high surface area microporous solids whose morphological properties and numbers of residual protons are dependent upon the relative amounts of the...

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Bibliographic Details
Published in:Catalysis letters 1999-01, Vol.60 (4), p.191-197
Main Authors: PARENT, M. A, MOFFAT, J. B
Format: Article
Language:English
Subjects:
Ammonia
Catalysis
Catalytic reactions
Cations
Chemistry
Exact sciences and technology
General and physical chemistry
Isomerization
NMR spectroscopy
Silver
Thallium
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Substitution of the protons in 12-tungstophosphoric acid by monovalent cations of the Groups 1B and 3B, in particular Ag+ and Tl+, respectively, produces high surface area microporous solids whose morphological properties and numbers of residual protons are dependent upon the relative amounts of the preparative reactants. Temperature-programmed desorption of NH3, 1H MAS NMR and the isomerization of 1-butene have been employed to demonstrate that both the numbers of protons and the distribution of the acidic strengths are dependent upon the nature of the cation and the preparative proton/cation ratios.
ISSN:1011-372X
1572-879X
DOI:10.1023/A:1019075511746