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Continuous flow homogeneous catalysis using ionic liquid/supercritical fluid biphasic systems
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dc.contributor.advisor | Cole-Hamilton, D. J. (David John) | |
dc.contributor.author | Martins, Tânia Isabel Quintas | |
dc.coverage.spatial | xxvi, 208 | en_US |
dc.date.accessioned | 2010-08-26T11:19:53Z | |
dc.date.available | 2010-08-26T11:19:53Z | |
dc.date.issued | 2010 | |
dc.identifier | uk.bl.ethos.552452 | |
dc.identifier.uri | http://hdl.handle.net/10023/982 | |
dc.description.abstract | Ionic liquid/scCO₂ biphasic systems have been studied as a possible solution to the main problems concerning homogeneous catalysis reactions such as, the product/catalyst separation, the catalyst retention in the reaction medium and the use of organic solvents. The hydroformylation of long chain alkenes (1-octene) has been carried out as a continuous flow reaction using [OctMIM]Tf₂N (OctMIM = 1-octyl-3-methylimidazolium, Tf = CF₃SO₂) as the reaction solvent and scCO₂as the mobile phase to extract the products. The performance of the rhodium complexes formed with the ionic ligands [PentMIM][TPPTS] (1-pentyl-3- methylimidazolium tri(m-sulfonyl)triphenylphosphine) and [OctMIM][TPPTS] (1-octyl-3- methylimidazolium tri(m-sulfonyl)triphenylphosphine) is described under different sets of experimental conditions. Continuous flow hydroformylation of 1-octene was also carried out using a SILP (Supported Ionic Liquid Phase) catalyst formed with the TPPTS-based ionic ligands named above. The SILP system described in this work has the peculiarity of introducing the “without gases” approach: syn gas was synthesised in situ by the decomposition of formaldehyde. The performance of both systems is compared in the end. The extension of the continuous flow ionic liquid/scCO₂ biphasic system is shown with the optimisation of the silver-catalysed heterocyclisation of furans. A comparison is carried out with a previously developed and optimised continuous flow heterogeneous system. | en_US |
dc.language.iso | en | en_US |
dc.publisher | University of St Andrews | |
dc.subject.lcc | QD505.M2 | |
dc.subject.lcsh | Catalysis | en_US |
dc.subject.lcsh | Hydroformylation | en_US |
dc.subject.lcsh | Supercritical fluid extraction | en_US |
dc.subject.lcsh | Rhodium catalysts | en_US |
dc.subject.lcsh | Silver catalysts | en_US |
dc.title | Continuous flow homogeneous catalysis using ionic liquid/supercritical fluid biphasic systems | en_US |
dc.type | Thesis | en_US |
dc.type.qualificationlevel | Doctoral | en_US |
dc.type.qualificationname | PhD Doctor of Philosophy | en_US |
dc.publisher.institution | The University of St Andrews | en_US |
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