異相觸媒催化2,4,6-三甲基酚之氧化反應的研究

• Main Author: 劉智文
• Other Authors: 李國禎
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/67632244204208474542

碩士 === 東海大學 === 化學工程學系 === 91 === Abstract The purpose of this thesis is to study the use of copper containing heterogeneous catalysts for selective oxidation of 2,4,6-trimethylphenol(2.4.6TMP) to 3.5-dimethyl-4-hydroxyben- zaldehyde. The effect of reaction conditions on the selectivity and yield of 3.5-dimethyl-4-hydroxybenzaldehyde and 2.6-dimethyl-4- hydroxybenzaldehyde was studied.In addition, the kinetics of 2.4.6- TMP oxidation was established. Experimental results indicated that the catalysts had the following order of performances: CuCl/MCM41>CuCl/SiO2>CuCl/MCM48>Cu(NO3)2/SiO2>CuCl/sol-gel>FeCl.nH2O/SiO2 The CuCl/McM41 had the highest yield (84.6%) and selectivity (82.7%) of 3.5-dimethyl-4-hydroxybenzaldehyde at 70℃ The kinetics study indicated that the 2.4.6-TMP oxidation was a pseudo-first order reaction, with the activation energies E1=58.198KJ/mole , E2=60 KJ/mole for CuCl/SiO2 and CuCl/MCM41, respectively ,E2=35 and 29 KJ/mole for CuCl/SiO2 and CuCl/MCM41, respectively. The catalysts were characterized with BET、ICP-AES、XRD、FTIR、TPR and TEM.