Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Catalyst Recycling"”.
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Redox-mediated separation for sustainable chemical manufacturing: Enantioselective separation and homogeneous catalyst recycling
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01
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Zur Hydroformylierung in ionischen Flüssigkeiten
… metal complex it is essential to minimise the catalyst loss. One attractive possibility is to carry out the reaction in a liquid-liquid biphasic reaction system. Ionic liquids are suggested as novel catalyst solvents for the biphasic hydroformylation reaction. Ionic liquids are low temperature …
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Hydrierung im invertierten Zweiphasensystem scCO 2/H 2 O
… an inverted scCO2/H2O biphasic system where the catalyst is immobilized in scCO2 as stationary phase and the substrate and product are contained in the aqueous phase, offers an interesting alternative to classical biphasic systems and enables the conversion of polar substrates, using scCO2 as …
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Selektive Hydrierung biogener organischer Disäuren mit Rutheniumphosphinkatalysatoren
… depth on the example of itaconic acid. Rutheniumcatalysts with phoshineligands were stable and active hydrogenation catalysts. Mono- and bydentate ligands catalyse the conversion towards the 2- and 3-methyl-gamma-butyrolactone (2-MBGL and 3-MGBL) whereas the tridentate ligand …
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Hyperverzweigte Polyelektrolyte als Träger für lösliche, recycelbare Homogenkatalysatoren
… Komplexes verglichen. Des weiteren wurde das Recycling durch Ultrafiltration untersucht. Die Anbindung über ionische Wechselwirkungen erwies sich als effizient. In der Ultrafiltration wurden Retentionen erhalten, die mit Literaturangaben für kovalent angebundene Katalysatoren vergleichbar sind.
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Metal-ligand cooperativity in first row transition metals: hydrosilylation catalysis and mechanistic insights
The utility of transition metal catalysts has greatly expanded the scope of organic reactions. Historically, homogenous catalysis is dominated by platinum group metals (PGMs) due to their relative high activity and stability to air when compared to the 1st row counterparts of PGMs. However, 1st row …
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Zur rhodiumkatalysierten Hydroformylierung von Octenen : neue Ligand- und Lösungsmittelkonzepte
… in homogenous catalysis is the separation of catalyst from the product. In the centre of interest of this thesis were the synthesis of monocyclic phosphite ligands for the n-selective hydroformylation of octenes and investigations on the recycling of the catalyst using two-phase systems and …
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Neue fluorhaltige und fluorophile Katalysatoren für die lebende Olefinpolymerisation, die radikalische Atomtransferpolymerisation und die Synthese von Blockcopolymeren
… Blockcopolymersynthesen als auch dem Recycling des eingesetzten Katalysators. <br> <br>Im Rahmen der vorliegenden Arbeit wurden Phenoxyiminkatalysatoren für die Synthese von Diblockcopolymeren vom Typ PE-block-P(E-co-P), PE-block-PS und P(E-co-P)-block-PS durch sequentielle …