Department of Chemical & Process Engineering, College of Engineering and Technology, University of Dar es Salaam, P. O. Box 35131, Dar es Salaam, Tanzania.
Water Sci Technol. 2009;60(10):2621-7. doi: 10.2166/wst.2009.528.
Catalytic wet peroxide oxidation (CWPO) of initial maleic acid feed concentration (0.005 to 0.03 M) was carried out in a temperature range of 20-50 degrees Celsius, on micelle templated silica-3-aminopropyltrimethoxysilane (MTS-AMP) supported copper catalyst. The influence of various operating parameters such as initial feed concentration of maleic acid, temperature, catalyst loading and the stability of the catalyst were investigated. CWPO reactions were performed in a stirred batch reactor at an atmospheric pressure in the presence of H(2)O(2) as an oxidant. Total conversion of maleic acid into acetic acid was obtained under mild conditions (i.e. atmospheric pressure and 40 degrees Celsius). Blank experiments showed no measurable maleic acid conversion (i.e. only approximately 0.5% conversion of initial maleic acid), indicating that a significant oxidation reaction of maleic acid is enhanced by the presence of a catalyst. Copper on micelle templated silica-3-aminopropyltrimethoxysilane catalyst therefore was found to be suitable for aqueous phase oxidation of maleic acid with 100% of maleic acid conversion.
在温度范围为 20-50 摄氏度的条件下，采用胶束模板二氧化硅-3-氨丙基三甲氧基硅烷（MTS-AMP）负载铜催化剂对初始马来酸进料浓度（0.005 至 0.03 M）进行催化湿式过氧氧化（CWPO）。考察了各种操作参数的影响，如马来酸的初始进料浓度、温度、催化剂负载量以及催化剂的稳定性。CWPO 反应在大气压力下于搅拌间歇式反应器中进行，以 H（2）O（2）作为氧化剂。在温和的条件下（即大气压力和 40 摄氏度）可获得马来酸的完全转化。空白实验表明马来酸的转化率可忽略不计（即初始马来酸的转化率仅约为 0.5%），这表明在催化剂的存在下，马来酸的氧化反应显著增强。因此，胶束模板二氧化硅-3-氨丙基三甲氧基硅烷负载铜催化剂适用于马来酸的水相氧化，马来酸的转化率为 100%。
