Reaction of glyoxal with aliphatic alcohols using cationic exchange resins as catalysts
Reaction of glyoxal with aliphatic alcohols using cationic exchange resins as catalysts
复制标题
DOI：
10.1021/op960002x
复制
发表时间：
1997-03-01
影响因子：
3.4
通讯作者：
Sharma, MM
中科院分区：
文献类型：
--
作者：
Mahajani, SM;Sharma, MM
考察了阳离子交换树脂indion130、Amberlyst-15和amberlitir -120在乙二醛与不同脂肪醇反应中作为催化剂的适用性，研究了甲醇、正丁醇、异戊醇和2-乙基己醇。在所有情况下，发现水在反应混合物中的存在对平衡转化和反应动力学，去除有很强的影响。研究了反应参数，如反应物的摩尔比、温度和催化剂负载，以最大限度地提高对工业上更重要的产物Le的选择性。在Langmuir-Hinshelwood-Hougen-Watson反应机理的基础上，提出了乙二醛与活性较弱的醇（正丁醇、异戊醇和2-乙基己醇）反应的简化集总参数模型，该模型包含四个参数。由于水浓度对这些反应动力学的影响不能用伪均相模型来解释。
The applicability of cationic exchange resins, such as Indion 130, Amberlyst-15, and Amberlite IR-120, as catalysts was evaluated for the reactions of glyoxal with different aliphatic alcohols to give mono-and diacetals, The alcohols studied in the present work were methanal, n-butanol, isoamyl alcohol, and 2-ethylhexanol. In all cases, the presence of water in the reaction mixture was found to have a strong impact an the equilibrium conversion and the reaction kinetics, The removal. of water results in a significant enhancement in the conversion levels, Reaction parameters such as mole ratio of reactants, temperature, and catalyst loading were studied to maximize the selectivity towards the industrially more important product, Le., monoacetals of glyoxal, Experimental data for the batch reactions of methanol are very well explained by a simple pseudohomogeneous model, A simplified lumped parameter model, consisting of four parameters, based on the Langmuir-Hinshelwood-Hougen-Watson mechanism, has been proposed for the reactions of glyoxal with less reactive alcohols (n-butanol, isoamyl alcohol, and 2-ethylhexanol), as the effect of water concentration on the kinetics of these reactions cannot be explained by a pseudohomogeneous model.