کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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68817 | 48524 | 2007 | 6 صفحه PDF | دانلود رایگان |
A much green synthesis method is discovered for the synthesis of t-butyl-p-cresol (TBC), an important used as antioxidant in food industries and the basic raw material for the manufacture of oil-soluble phenol–formaldehyde resins. The TBC is synthesized with a conversion (93.2%) and selectivity (98.6%) through a heterogeneous t-butylation of p-cresol with t-butyl alcohol (t-BuOH) in the liquid phase over mild strong acid catalyst, Zn–Al-MCM-41(75). The catalytic results have also compared with those obtained using other Zn–Al-MCM-41, Al-MCM-41, HY, Hβ, H-mordenite and H-ZSM-5 zeolites. Based on the catalytic results, Zn–Al-MCM-41(75) is found to be a highly active and recyclable heterogeneous catalyst for selective synthesis of TBC.
A novel mesoporous Zn–Al-MCM-41 is found to be a highly active and recyclable heterogeneous catalyst suitable for the selective synthesis of TBC by t-butylation of p-cresol with butyl alcohol having much higher acidity and activity than other catalysts, such as Al-MCM-41(21), USY, Hβ, H-ZSM-5 and H-mordenite. Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 264, Issues 1–2, 1 March 2007, Pages 44–49