洪桂彬老師的歷程檔案

專題研究計畫名稱	以反應性蒸餾法製備紫外線吸收劑之研究 (NSC 100-2221-E-562-003-)
資料日期	2012-02-14

[摘要] :
本計畫為反應性蒸餾法製備紫外線吸收劑(酯類化合物)之研究，酸性離子交換樹脂在此方法中擔任吸附劑與酯類水解反應之觸媒的角色。本專題計畫的主要研究項目包括液-液相平衡、吸附、反應動力以及反應性蒸餾等。液液相平衡數據將分別以NRTL 與UNIQUAC 模式擬合，並用以檢驗不同版本UNIFAC 模式，預測水-苯乙醇-水楊酸苄酯系統之液-液相平衡性質的合適性;反應動力數據則分別以擬均相動力模式、Langmuir-Hinshelwood及Eley-Rideal關聯出各模式正、逆向碰撞頻率因子、正向活化能、反應熱及水的吸附平衡常數等。以製備紫外線吸收劑的酯化反應為示範例，上列之研究主題將在二年內完成。從以上之一系列的實驗結果，將可提供開發此一反應性蒸餾技術所需的基礎資料。

[英文摘要] :
This project is a study on the preparation of UV absorber with reactive distillation method. An acidic ion-exchange resin is used as an absorbent and a catalyst for the hydration of an ester. The main items of this project include the studies on liquid-liquid phase equilibria, adsorption, kinetics of hydration, and reactive distillation. The LLE data were correlated with the NRTL and UNIQUAC models, respectively, and were also used to test the validity of various versions of the UNIFAC model for predicting the phase properties of water-phenethyl alcohol-benzyl salicylate system. The kinetic data were correlated with the quasi-homogeneous, the Langmuir-Hinshelwood, and the Eley-rideal models. The frequency factor, the activation energy of the forward reactions, the heat of reaction, and the adsorption equilibrium constant of water were determined by correlating the kinetic data with those models. While the preparation of UV absorber is taken as an illustrative example, the studies on the main topics mentioned above will be done within two years. The results of this series of experimental works are capable of providing useful fundamental information, which is essentially needed for the process development of the reactive distillation system.