Encapsulation of cobalt complexes in zeolite Y for use as hydroformylation catalysts

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dc.contributor.advisorMoss, Johnen_ZA
dc.contributor.advisorDry, Marken_ZA
dc.contributor.advisorO'Connor, Cyrilen_ZA
dc.contributor.authorGalatolo, Paul Joseph Victoren_ZA
dc.date.accessioned2016-08-18T13:54:36Z
dc.date.available2016-08-18T13:54:36Z
dc.date.issued1997en_ZA
dc.descriptionBibliography: pages 131-138.en_ZA
dc.description.abstractIn industry, the hydroformylation reaction is predominantly homogeneously catalysed using carbonyl complexes of cobalt and rhodium (1-3,45). The main disadvantage of homogeneous catalysts is that, especially for the longer chain hydrocarbon systems, very energy-intensive methods (such as distillation) are required to remove them from the reaction products. These separation techniques usually lead to losses of the catalyst. From an economic viewpoint, this is highly undesirable since the catalysts (especially rhodium) are expensive. Research has been carried out on encapsulating the catalysts within the cages of a zeolite, maintaining the activity of the catalyst while allowing it to be easily removed from the reaction medium ( eg. by filtration). However, all research reported so far has only considered rhodium catalysts (1,66-71,87). Furthermore, in most cases, leaching of the rhodium from the zeolite was significant enough to be undesirable. No successful research has been reported on encapsulating cobalt in zeolites for use as a hydroformylation catalyst. In this study, the synthesis of cobalt complexes encapsulated in the supercages of zeolite Y was attempted. The species initially present on the zeolites were analysed by Fourier-Transform Infrared Spectroscopy (FT-IR) and identified by comparison with the IR spectra of pure cobalt complexes synthesised independently in the laboratory. The impregnated catalysts were washed with various solvents to see if the cobalt complex remained in the zeolite. The impregnated zeolites were also tested as hydroformylation catalysts and compared with homogeneous catalysts.en_ZA
dc.identifier.apacitationGalatolo, P. J. V. (1997). <i>Encapsulation of cobalt complexes in zeolite Y for use as hydroformylation catalysts</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/21339en_ZA
dc.identifier.chicagocitationGalatolo, Paul Joseph Victor. <i>"Encapsulation of cobalt complexes in zeolite Y for use as hydroformylation catalysts."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 1997. http://hdl.handle.net/11427/21339en_ZA
dc.identifier.citationGalatolo, P. 1997. Encapsulation of cobalt complexes in zeolite Y for use as hydroformylation catalysts. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Galatolo, Paul Joseph Victor AB - In industry, the hydroformylation reaction is predominantly homogeneously catalysed using carbonyl complexes of cobalt and rhodium (1-3,45). The main disadvantage of homogeneous catalysts is that, especially for the longer chain hydrocarbon systems, very energy-intensive methods (such as distillation) are required to remove them from the reaction products. These separation techniques usually lead to losses of the catalyst. From an economic viewpoint, this is highly undesirable since the catalysts (especially rhodium) are expensive. Research has been carried out on encapsulating the catalysts within the cages of a zeolite, maintaining the activity of the catalyst while allowing it to be easily removed from the reaction medium ( eg. by filtration). However, all research reported so far has only considered rhodium catalysts (1,66-71,87). Furthermore, in most cases, leaching of the rhodium from the zeolite was significant enough to be undesirable. No successful research has been reported on encapsulating cobalt in zeolites for use as a hydroformylation catalyst. In this study, the synthesis of cobalt complexes encapsulated in the supercages of zeolite Y was attempted. The species initially present on the zeolites were analysed by Fourier-Transform Infrared Spectroscopy (FT-IR) and identified by comparison with the IR spectra of pure cobalt complexes synthesised independently in the laboratory. The impregnated catalysts were washed with various solvents to see if the cobalt complex remained in the zeolite. The impregnated zeolites were also tested as hydroformylation catalysts and compared with homogeneous catalysts. DA - 1997 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1997 T1 - Encapsulation of cobalt complexes in zeolite Y for use as hydroformylation catalysts TI - Encapsulation of cobalt complexes in zeolite Y for use as hydroformylation catalysts UR - http://hdl.handle.net/11427/21339 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21339
dc.identifier.vancouvercitationGalatolo PJV. Encapsulation of cobalt complexes in zeolite Y for use as hydroformylation catalysts. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 1997 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21339en_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.titleEncapsulation of cobalt complexes in zeolite Y for use as hydroformylation catalystsen_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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