Kinetic Study of Synthesizing Unsymmetric Alkyl Sulfide Ether Under Phase Transfer Catalysis

• Main Author: 賴宏凱
• Other Authors: 王茂齡
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/21415552190184351311

碩士 === 東海大學 === 化學工程學系 === 92 === The objective of this dissertation is to synthesize the alkyl sulfide ether in an organic solvent/aqueous solution two-phase medium by phase transfer catalysis. Thioethers can be used as perfume and inverse phase transfer catalyst. The primary purpose of this dissertation is to study the phase transfer catalytic reaction of thioether compounds, reaction mechanism, kinetics, and parameters in order to obtain the optimum reaction conditions. The experimental results prove the actuality of the reaction mechanism and confirm following the pseudo first-order rate law. Several rigid results were obtained from the expertmental work. A. Using phase transfer catalyst to synthesize unsymmetrical sulfide ether could improve the reaction rate, increase higher yield and elevate the conversion in mild reaction conditions. B. The hypothesis of the reaction mechanism, which is identified by the experimental results is correct. Using pseudo first-order rate law and pseudo steady-state hypothesis(PSSH) could be used to describe the reaction model successfully. C. Based on the experimental data, it is known that the reaction is enhanced with the increase in temperature, amount of catalyst and symmetric form of the catalyst. In addition, the rection is also affected by the amount of water, organic solvent and the molar ratio of the two reactants.