Investigation of the Catalytic Nature of Fe3+-Exchanged Clays on Cyclohexanol and Cyclohexene
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Date
1995-06
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Addis Ababa Universty
Abstract
The investigation of the catalytic nature of cation exchanged clays on some organic
reactions was the core objective in this project. Important features of the three clays,
local clay, drilling mud bentonite, and bentonite(BDH) with respect to free swelling,
exchangeable bases, CEC, acidity measurement, IR spectra have been studied. The
study of the catalytic activities of Fe3
+ -exchanged clays(local clay, drilling mud
bentonite and BDH-bentonite) was carried out on cyclohexanol and cyclohexene
under reflux conditions. As shown by gas chromatographic analysis, the Fe3
+_
exchanged clays were able to convert the substrates into new products.
By using retention time coincidence tests and co-injection peak enhancement
technique, one of the products obtained from cyclohexanol with the three Fe3
+ -cation
exchanged clays was identified to be cyclohexene. The second product was not
identified but suggested to be dicyclohexyl ether. In the case of refluxing
cyclohexene, retention time coincidence test reveals that no cyclohexanol was formed
as a product. But other unidentified products were formed as shown by the
appearance of new peaks. The ferric cation exchanged clays have dehydrated
cyclohexanol and could not hydrate cyclohexene. Therefore, the clays may be
identified as dehydrating agents.
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Keywords
Catalytic Nature of Fe3+-Exchanged