Catalytic debutylation oftert-butylphenols by some natural clays
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In the catalytic debutylation oftert-butylphenols by some Jordanian, Bulgarian and Turkish natural clays, Jordanian kaolin and bentonite were found to be the most active catalysts among the clays studied. The activity of these clays to converto-tert-butylphenol to phenol,p-tert-butylphenol and other minor products is in the following order: Jordanian kaolin >Jordanian bentonite>Turkish bentonite> Bulgarian bentonite. While for the conversion ofp-tert-butylphenols, Jordanian clays showed moderate activity, with bentonite being the most active, the other clays were not active. Also, all the clays studied were ineffective towards conversion ofm-tert-butylphenol. As to the debutylation selectivity of theortho isomer, Jordanian bentonite proved to be slightly debutylation selective, whereas Jordanian kaolin showed a relatively high selectivity toardsortho topara isomerization. Thepara isomer produced only debutylation products and none of the other isomers.
KeywordsClays de-tert-butylation phenols catalyst
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