Catalytic Condensation of Carbonyl Compounds during the Synthesis of Cyclohexanone in the Production of Caprolactam
作者:E. A. Martynenko、S. V. Levanova、I. L. Glazko、A. A. Morgun
DOI:10.1134/s0965544118100122
日期:2018.12
conditions (30–50°C). Noncarbonyl unsaturated compounds (e.g., 2-cyclohexene-1-ol) can be removed only at temperatures above 100°C in the presence of acidic catalysts (e.g., high-temperature sulfonated cation-exchange resins). Unsaturated cyclic ketones are characterized by both alkylation reactions over acid catalysts and aldol condensation reactions in the presence of an alkali, thereby suggesting the
摘要在存在和不存在相转移催化剂的情况下,已经在异相体系中使用模型混合物研究了羰基和不饱和杂质在环己酮中的缩合过程的动力学特征。研究表明,在温和条件下(30–50°C),在存在和不存在相转移催化剂的情况下,线性醛与环己酮在异相体系中缩合。非羰基不饱和化合物(例如2-环己烯-1-醇)只能在酸性催化剂(例如高温磺化阳离子交换树脂)存在下于高于100°C的温度下除去。不饱和环状酮的特征在于在酸催化剂下的烷基化反应和在碱存在下的醛醇缩合反应。因此表明在不同的环己酮纯化步骤中消除它们的可能性。建立的理论模型可用于开发有效的环己酮纯化技术,该技术将大大提高高纯度己内酰胺和聚酰胺的可制造性。