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Highly active and selective AlSBA-15 catalysts for the vapor phase tert-butylation of phenol

“…The possible reaction products of the tertiary butylation of phenol depend upon the nature and strength of active sites present in the catalyst [27]. Selvam and co-workers [27][28][29] have reported the tert-butylation of phenol over AlMCM-41 and FeMCM-41 and proposed that the moderate acidity of these catalysts is favorable for the formation of the para-isomer (4-TBP). Very recently, we have reported the tert-butylation of phenol over FeAlMCM-41 and FeSBA-1, which exhibit higher conversion and selectivity to 4-TBP as compared with other mesoporous catalysts [30].…”

Alkylation of ?-Methylnaphthalene with Long-Chain Olefins over Large-Pore Zeolites

“…In contrast, obvious decrease in conversion with increase in TOS above 540 min was observed. The decrease in conversion with increasing in time-on-stream might be attributed to a gradual increase in the blocking of the active sites by olefin oligomers and coke formation [32]. Furthermore, the catalytic activity of regenerated zeolite catalyst is also exhibited in the figure.…”

Alkylation of Hydroquinone with tert-Butanol Catalyzed by Polymer-supported Sulfonimide

“…Badamali et al [24] considered that only weak acid sites can favor formation of O-alkylation product, and Yadav et al [14,25] thought that the ratio of different products depends on the nature of catalysts and reaction conditions used for alkylation. According to these viewpoints, there should be no O-alkylation hydroquinone producing in the presence of strong acidic PPFSI.…”