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

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dc.contributor.advisorFletcher, Jacken_ZA
dc.contributor.advisorBöhringer, Walteren_ZA
dc.contributor.authorNtshabele, John Phenyo Phekoen_ZA
dc.date.accessioned2014-07-31T11:14:43Z
dc.date.available2014-07-31T11:14:43Z
dc.date.issued2005en_ZA
dc.descriptionIncludes bibliographical references (p. 177-185).
dc.description.abstractSelectivity 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.identifier.apacitationNtshabele, 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/11427/5423en_ZA
dc.identifier.chicagocitationNtshabele, 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/11427/5423en_ZA
dc.identifier.citationNtshabele, J. 2005. Acid catalysed alkylation of diphenyl ether with methanol over shape-selective zeolites. University of Cape Town.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
dc.identifier.urihttp://hdl.handle.net/11427/5423
dc.identifier.vancouvercitationNtshabele 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/11427/5423en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemical Engineeringen_ZA
dc.titleAcid catalysed alkylation of diphenyl ether with methanol over shape-selective zeolitesen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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