Activity of h-beta zeolites re-exchanged with alkaline and earth-alkaline cations in the fries rearrangement of phenyl acetate
Joint Authors
Ismail, Rokhsana
Adryan, Philip
Roessner, Frank
Source
Issue
Vol. 2, Issue 3 (31 Dec. 2007), pp.235-245, 11 p.
Publisher
Yarmouk University Deanship of Research and Graduate Studies
Publication Date
2007-12-31
Country of Publication
Jordan
No. of Pages
11
Main Subjects
Abstract EN
The heterogeneously catalyzed liquid phase Fries rearrangement reaction of phenyl acetate was carried out on Beta zeolites re-exchanged with different amounts of metal captions.
The aim of this work was to determine the influence of the amount of Brönsted acid sites as the catalytic active centers on the conversion and to study differences in their acidic strength.
Sodium and potassium ions as well as bivalent calcium and zinc ions were used in the exchange procedure.
The conversion shows a linear dependency on the degree of ion exchange following the theoretically expected values.
So the results proof that the bridged hydroxyl groups are indeed the dominating active centres and that their strength seems to be independent on the degree of re-exchange.
A special emphasis was placed on the re-exchange with bivalent metal ions.
It was shown that one bivalent ion is not able to replace two protons as supposed to be necessary for the charge balance-so a 1 : 1 stoichiometry is needed to assume to explain the catalytic results.
American Psychological Association (APA)
Ismail, Rokhsana& Adryan, Philip& Roessner, Frank. 2007. Activity of h-beta zeolites re-exchanged with alkaline and earth-alkaline cations in the fries rearrangement of phenyl acetate. Jordan Journal of Chemistry،Vol. 2, no. 3, pp.235-245.
https://search.emarefa.net/detail/BIM-276831
Modern Language Association (MLA)
Ismail, Rokhsana…[et al.]. Activity of h-beta zeolites re-exchanged with alkaline and earth-alkaline cations in the fries rearrangement of phenyl acetate. Jordan Journal of Chemistry Vol. 2, no. 3 (Dec. 2007), pp.235-245.
https://search.emarefa.net/detail/BIM-276831
American Medical Association (AMA)
Ismail, Rokhsana& Adryan, Philip& Roessner, Frank. Activity of h-beta zeolites re-exchanged with alkaline and earth-alkaline cations in the fries rearrangement of phenyl acetate. Jordan Journal of Chemistry. 2007. Vol. 2, no. 3, pp.235-245.
https://search.emarefa.net/detail/BIM-276831
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 245
Record ID
BIM-276831