| Ionic liquid has become the focus of science and technology, as a new kind of reaction medium and catalytic materials. Epoxy compounds are extremely useful organic chemical intermediates for many important chemical products. They have been widely applied in polymer synthesis industry, petrochemical and fine chemical industry, etc. Epoxy compounds have been obtained of mainly by epoxidation reaction, which become one of the most hot research fields.In this dissertation, ionic liquid containing rhenium: 1-octyl-3-methyl- -imidazolium perrhenate （[Omim][ReO4]）, was synthesized and characterized. The densities, surface tension of the IL at different temperature range, were determined by Westphal balance and forced bubble method, respectively. The volumetric and surface properties of the IL were discussed. Using Glasser’s theory, also with Kabo’s and Rebelo’s empiric methods, the parameters and relative values of the IL properties, such as the molecular volumn, standard entropy, lattice energy, surface excess entropy, surface excess energy and molar enthalpies of vaporization etc., were estimated. The parameters of interstice and the coefficients of thermal expansion,α, of the IL was calculated, and was in good agreement with the experiment value, which means the interstice model is reasonable.Through the selection of solvent, oxidant, we examined the catalytic results of different material, then confirmed the system: cyclooctene as substrate, UHP as oxidant, ionic liquid as catalyst and solvent. By mulriple experiments, the most optimum reaction conditions was determined: Cyclooctene （1 mmol） as the substrate, UHP 2.5mmol, ionic liquids 0.6mL, temperature 70℃, reaction time 2h. The kinetics of the system was also discussed in the dissertation, and the activation energy was calculated. On this basis, we also investigated the magnification experiment of the catalytic system, which has importance in process design and industry application of the reaction.In order to investigate better application of epoxidation reaction for ionic liquids, we put tungsten functional groups into the ionic liquids, and synthesized the fictionalization ionic liquids containing tungsten. Four kinds of ionic liquids containing tungsten have been synthesized: 2-（1-propyl-3-methyl-imidazolium） tungstate （[C3mim]2[WO4]）, 2-（1-butyl-3-methyl-imidazolium） tungstate （[C4mim]2[WO4]）, 2-（1-pentyl-3-methyl-imidazolium） tungstate （[C5mim]2[WO4]）, 2-（1-hexyl-3- methyl- imidazolium） tungstate （[C6mim]2[WO4]）. Then determined their density、surface tension, and the volumetric and surface properties of the IL were also discussed. The molecular volumn, standard entropy, lattice energy, surface excess entropy, surface excess energy and molar enthalpies of vaporization etc., were estimated. Also the epoxidation reaction for cyclooctene was performed.This research has more importance to rare metals chemistry and green chemistry, which enlarges the contents of ionic liquids, and perfects the fundamental theory of olefin epoxidation reaction, and also supports the industry in theory guidance. |
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