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Delaminated Zeolite, ITQ-6 as Heterogenous Catalyst for Friedel Crafts Alkylation.

Zainab Ramli, and Noor Aishikin Mohd. Yusoff, and Halimaton Hamdan, (2007) Delaminated Zeolite, ITQ-6 as Heterogenous Catalyst for Friedel Crafts Alkylation. Malaysian Journal of Analytical Sciences, 11 (1). pp. 84-92. ISSN 13942506

Full text not available from this repository.

Official URL: http://pkukmweb.ukm.my/~mjas/v11_n1/13_233C1-1.pdf

Affiliations

Universiti Teknologi Malaysia, Faculty of Science, Dept. of Chemistry

Abstract

The ability of ITQ-6, a kind of mesoporous zeolitic material to replace microporous zeolite as catalyst has attracted particular attention. In this study, modification of a precursor of microporous ferrierite, PREFER to mesoporous material, ITQ-6 was carried out by delamination technique. The XRD results show that the crystalline phase of PREFER diminished for the sample after delamination. Porosity study of the ITQ-6 sample shows formation of homogeneous mesopores in the size between 3.5-4.0 nm. The acidity study indicates that ITQ-6 still contains appreciable amounts of Brönsted and Lewis
acidities. Catalytic evaluation of the resulting material, ITQ-6 was carried out in the alkylation of resorcinol with methyl tert-butyl ether which gave 4-tert-butyl resorcinol and 4,6-di-tert-butyl resorcinol as main products. The conversion of resorcinol when using ITQ-6 was ten times higher than ferrierite, FER with similar selectivity of disubstituted product. It shows that the mesoporosity of ITQ-6 was responsible for the higher activity of the catalyst in the reaction.


Kebolehan ITQ-6 sejenis bahan zeolit berliang meso menggantikan zeolit berliang mikro sebagai mangkin telah menarik perhatian. Dalam kajian ini, pengubahsuaian bahan awal ferrierit berliang mikro, PREFER kepada bahan berliang meso ITQ-6 dilakukan melalui teknik penyahlaminan. Keputusan XRD menunjukkan yang fasa hablur PREFER musnah selepas proses penyahlaminan. Kajian keliangan terhadap sampel ITQ-6 menunjukkan pembentukan liang meso yang homogen dengan saiz liang antara 3.5-4.0 nm. Kajian keasidan menunjukkan yang ITQ-6 masih mengandungi keasidan Brönsted dan Lewis dengan amoun yang agak banyak. Kereaktifan bahan yang terhasil, ITQ-6 diuji dalam tindak balas pengalkilan resorsinol dengan metil tert butyl eter yang menghasilan 4-tert-butil resorsinol and 4,6-di-tert-butil resorsinol sebagai hasil utama. Pertukaran resorsinol apabila menggunakan ITQ-6 adalah sepuloh kali lebih tinggi daripada ferrierit, FER, dengan
kepilihan yang sama bagi hasil dwitertukarganti. Ini menunjukkan yang ITQ-6 yang berliang meso bertanggungjawab ke atas kereaktifan mangkin dalam tindak balas.

Item Type:Journal
Additional Information:The authors acknowledge the Malaysian Ministry of Science, Technology and Innovation for the financial support through IRPA funding 09-02-06-0057-SR005/09-06 and MARA for the scholarship funding.
Keywords:Mesoporous ITQ-6, Microporous FER, alkylation of resorcinol
Subjects:Q Science
ID Code:1014

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