Kinetics Study For Synthesis Of Trioxane Catalyzed By Ionic Liquids

Trioxymethylene is one of good chemical materials, widely used in engineering plastics and other chemical intermediates. Traditionally, H2SO4as the catalyst has been used to synthesize trioxymethylene, but it has some intrinsic limitations, for example, high equipments corrosion rate, poor selectivity and difficulty to separate with the products. In order to improve productivity and reduce energy consumption, a series of novel preparation methods have been puts forward. Hence, great strides have been made in synthesis and separation process of Trioxymethylene research. Currently, the researchers from Lanzhou Institute of Chemical Physics acquired intellectual property rights using the ionic liquid as the catalyst in the synthesis of trioxymethylene. Comparing to traditional methods, it is an environmentally benign and lightened equipment corrosion technology, which reduced the investment cost for producing trioxymethylene dramatically and industry industrial tests with one megaton every year has been finished. However, till now, it hasn’t been reported the dynamics of synthesis trioxymethylene using ionic liquid as a catalyst, which is unfavourable for controlling synthesis and industrialization.In this thesis, the dynamics of synthesize trioxymethylene has been studied with different ionic liquids. The effects of catalysts structure, concentration, reactant concentration, temperature and pressure for product distribution, and the model of kinetic model was built. Then, some kineticparameters were obtained, such as reaction rate constant ki,, activation energy Ea, and activation energy A,. Furthermore, formaldehyde carbonylation reaction was investigated. It is found that the methyl glycolate from the catalyzed reactions were over97.6%and the reaction activity did not significantly decrease since the catalyst and solvent was used repeatedly for8times.