• 作者： Wu, Ho-Sheng
• 中文摘要： 在相間轉移觸媒催化下探討液-液兩相中離子交換平衡(.Q/sup +-/X/sub 0/bar.+/sup -/Y/sub a/.arrlr./sup (K/sub (Y/X)//sup sel/)/ /sup -/X/sub a/+.Q/sup +-/Y/sub 0/bar.)對反應的影響。當選擇性系數大於100或者分配係數大於10時,反應速率隨之增加微微增加。具相同之選擇性係數其反應型態相似,然其反應速率卻隨著分配係數的增加而增加。模擬結果解釋為何在相間轉移觸媒催化反應中,反應會呈現虛擬一次反應(K/sub (Y/X)//sup sel />1),自觸作用或者觸媒毒化(K/sub (Y/X)//sup sel/<1)等三種行為。水相主反應物濃度增高,可增加觸媒之效率,甚且可使得反應由觸媒毒化行為轉變為虛擬一次反應行為。
• 英文摘要： The effect of liquid-liquid anion-exchange equilibrium (.Q/sup +-/X/sub 0/bar.+/sup -/Y/sub a/.arrlr./sup K/sub (Y/X)//sup sel/)/ /sup -/X/sub a/+.Q/sup +-/Y/sub 0/bar.) on a reaction rate by phase- transfer catalysis was investigated in this study. A smaller increase of the reaction rate was observed to occur when the selectivity coefficient exceed 100 or when the distribution coefficient exceeded 10. The rate profiles of the reactions, being of the same selectivity coefficient, were found to be almost the same; however, the reaction rate would increase when the distribution coefficients of phase-transfer catalyst were large. The simulation results accounted for the reason why some phase-transfer catalytic reactions could be described according to a pseudo-first- order process (K/sub (Y/X)//sup sel/>1), others would reveal autocatalytic behavior, and still others would follow an effective catalytic poison behavior (K/sub (Y/X)//sup sel/<1). The reaction behavior is not absolute, since incremental alteration of concentration of reactant in the aqueous phase increases the effective concentration of catalyst QY/sub 0/ and increase the reaction rate. That condition can even alter the reaction behavior from catalytic poison to pseudo-first-order process.
• 中文關鍵字： 選擇性係數; 相轉移觸媒; 分配係數; 液-液相陰離子交換; 虛擬一次反應; 觸媒毒化
• 英文關鍵字： Selectivity Coefficient; Phase-Transfer Catalyst; Distribution Coefficient; Liquid-Liquid Phase Anion Exchange; Pseudo First Order Reaction; Catalytic Poison