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Title: Green transformations involving ionic liquids
Author: Yan, T. Y.
ISNI:       0000 0004 5369 5408
Awarding Body: Queen's University Belfast
Current Institution: Queen's University Belfast
Date of Award: 2014
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The work in this thesis focussed on the integration of its green elements: ionic liquids, microwave reactors, and micro channel reactors. The traditional thermal, microwave heating, and microflow systems were studied and compared for a carefully selected reaction catalysed by ionic liquid. The reaction of indole methylation was chosen for its relevance to indole alkaloid synthesis and industrial applications. The ionic liquid tributylmethylammonium methylcarbonate was used as the catalyst in the reaction. The reaction was investigated in the batch traditional thermal heating system, optimised in a microwave reactor, and successfully transferred into a continuous microflow reactor. The flow system was then concluded as the most efficient and clean process amongst the three, giving an optimised yield of 99% with a selectivity of 100%. In addition, the ionic liquid precursor, I-butylpyrrolidine, was synthesised in the microwave reactor, and the conditions were optimised. Then, the ionic liquid 1 butylpyrrolidinium methylcarbonate was generated directly from the microwave reactor, and used as a catalyst to synthesise glycidol from glycerol using dimethyl carbonate. A full conversion of glycerol and a selectivity of 90% were gained. This became a valorisation reaction of the abundant biodiesel byproduct glycerol, which was patented by QUILL in 2013. Importantly, the green reagent dimethyl carbonate was used in the ionic liquid synthesis, glycidol production and indole methylation processes providing atom-economic and clean processes.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available