Acid catalysed alkylation of diphenyl ether with methanol over shape-selective zeolites

 

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dc.contributor.advisor Fletcher, Jack en_ZA
dc.contributor.advisor Böhringer, Walter en_ZA
dc.contributor.author Ntshabele, John Phenyo Pheko en_ZA
dc.date.accessioned 2014-07-31T11:14:43Z
dc.date.available 2014-07-31T11:14:43Z
dc.date.issued 2005 en_ZA
dc.identifier.citation Ntshabele, J. 2005. Acid catalysed alkylation of diphenyl ether with methanol over shape-selective zeolites. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/5423
dc.description Includes bibliographical references (p. 177-185).
dc.description.abstract Selectivity in methylation of phenol over acidic catalysts depends primarily on temperature and the acidity of the catalyst. It is reported that direct methylation of phenol with methanol over weakly acidic catalysts yields predominantly o-cresol, whilst catalysts with medium acidity yield primarily o- and p-cresol, with significant anisole formation at lower temperatures (≈ 200°C). m-Cresol is, however, formed with significant selectivity over strongly acidic catalysts or at higher temperatures (typically 300°C and more). To date, only one industrial process is known which is selective to p-cresol but has the disadvantage of co-formaiton of inorganic salt, which is costly to dispose of. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Chemical Engineering en_ZA
dc.title Acid catalysed alkylation of diphenyl ether with methanol over shape-selective zeolites en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Engineering and the Built Environment
dc.publisher.department Department of Chemical Engineering en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Ntshabele, J. P. P. (2005). <i>Acid catalysed alkylation of diphenyl ether with methanol over shape-selective zeolites</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/5423 en_ZA
dc.identifier.chicagocitation Ntshabele, John Phenyo Pheko. <i>"Acid catalysed alkylation of diphenyl ether with methanol over shape-selective zeolites."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2005. http://hdl.handle.net/11427/5423 en_ZA
dc.identifier.vancouvercitation Ntshabele JPP. Acid catalysed alkylation of diphenyl ether with methanol over shape-selective zeolites. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2005 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/5423 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Ntshabele, John Phenyo Pheko AB - Selectivity in methylation of phenol over acidic catalysts depends primarily on temperature and the acidity of the catalyst. It is reported that direct methylation of phenol with methanol over weakly acidic catalysts yields predominantly o-cresol, whilst catalysts with medium acidity yield primarily o- and p-cresol, with significant anisole formation at lower temperatures (≈ 200°C). m-Cresol is, however, formed with significant selectivity over strongly acidic catalysts or at higher temperatures (typically 300°C and more). To date, only one industrial process is known which is selective to p-cresol but has the disadvantage of co-formaiton of inorganic salt, which is costly to dispose of. DA - 2005 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2005 T1 - Acid catalysed alkylation of diphenyl ether with methanol over shape-selective zeolites TI - Acid catalysed alkylation of diphenyl ether with methanol over shape-selective zeolites UR - http://hdl.handle.net/11427/5423 ER - en_ZA


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