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Permanent link (DOI): https://doi.org/10.7939/R33P5K

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Acid Catalyzed Aromatic Alkylation in the Presence of Nitrogen Bases Open Access

Descriptions

Other title
Subject/Keyword
aromatic alkylation
coal liquids
acid catalysts
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Xia,Yuhan
Supervisor and department
De Klerk, Arno(Chemical and Material Engineering)
Examining committee member and department
Semagina,Natalia (Chemical and Material Engineering)
De Klerk, Arno(Chemical and Material Engineering)
Bergens, Steven H.(Chemistry)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2012-09-24T15:38:57Z
Graduation date
2012-09
Degree
Master of Science
Degree level
Master's
Abstract
Coal pyrolysis liquids are rich in olefinic, phenolic and aromatic compounds, but traditional hydroprocessing destroys their inherent synthetic values. Acid catalyzed processes are not considered, because coal pyrolysis liquids also contain nitrogen bases. We aim to find appropriate catalysts that can conduct acid catalysis in the presence of nitrogen bases. Catalytic aromatic alkylation using phenol and 1-hexene without and with pyridine was selected as model reaction at 315°C. Different alumina and silicaalumina (1-40 wt% silica) catalysts were characterized. Siral30, the catalyst with the highest medium strength acidity, performed best when the feed contained a nitrogen base. Siral40, the catalyst with the highest strong Brønsted acidity, performed best in the absence of nitrogen bases. Hydration affected the catalysis and had to be controlled. Autocatalysis of phenol alkylation with alkenes can also proceed and was responsible for a minor contribution to the overall conversion. The reaction products were mainly ortho-C-alkylphenols.
Language
English
DOI
doi:10.7939/R33P5K
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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