乙烯氧化制环氧乙烷银催化剂研究进展

摘要

综述了乙烯氧化制环氧乙烷银催化剂的重要研究进展。包括通过调整添加组分及配比、改进载体结构、控制载体中各种杂质含量等方法改进载体；通过各种共促进剂的使用、改进载体浸渍方法和催化剂活化过程，提高Ag-Re-Cs体系催化剂的性能；通过低浓度CO2进料、高温预处理、反应抑制剂控制、反应失控控制和使用微通道反应器等工艺方法改善催化剂的使用性能。%The important research advances in silver catalyst of preparing ethylene oxide by ethylene oxidation are summarized in this article. Which includes: improving carrier performance through adjusting additives and thereof proportions, bettering pore structure and controlling various impurity content; improving the performance of Ag-Re-Cs catalyst by means of using kinds of co-promoter to improve carrier impregnation methods and catalyst activation process; optimizing catalyst performance via low concentration of carbon dioxide feeding, high temperature pretreatment, reaction nhibitors controlling, avoiding the danger of reaction out of control and using micro-channel reactor.