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Selective gas phase tert-butylation of 4-hydroxyanisole over mesoporous PWA/Al-MCM-41 molecular sieves

Paper ID Volume ID Publish Year Pages File Format Full-Text
51608 46848 2008 6 PDF Available
Title
Selective gas phase tert-butylation of 4-hydroxyanisole over mesoporous PWA/Al-MCM-41 molecular sieves
Abstract

Mesoporous Al-MCM-41 and phosphotungstic acid (PWA) impregnated Al-MCM-41 samples were prepared and characterized by various physiochemical techniques like XRD, N2 adsorption isotherm, FT-IR spectroscopy, pyridine adsorbed FT-IR, SEM-EDX and 27Al-MAS NMR spectroscopy. Their catalytic reactivity was tested for the gas phase tert-butylation of 4-hydroxyanisole (HA) with methyltertiarybutylether (MTBE) under atmospheric pressure in the temperature range of 200–450 °C. PWA was well dispersed in mesoporous Al-MCM-41 matrix and has yielded desired acidity for the reaction. Especially 20 wt%PWA/Al-MCM-41(25) catalyst prepared by wet impregnation technique showed maximum conversion of HA (58.2%) with a selectivity of 67.3% at 225 °C.

Keywords
4-Hydroxyanisole (HA); Gas phase; MTBE; Phosphotungstic acid (PWA); Al-MCM-41; Butylatedhydroxyanisole (BHA)
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Selective gas phase tert-butylation of 4-hydroxyanisole over mesoporous PWA/Al-MCM-41 molecular sieves
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 2, 15 November 2008, Pages 150–155
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us