【摘要】 综述了气固相法合成邻甲(乙)氧基苯酚反应过程、所用的催化剂及反应机理的研究进展情况。主要介绍了高岭土、水滑石、氧化物、分子筛、磷酸盐等催化剂体系对邻苯二酚与甲(乙)醇(或碳酸二甲酯)气相合成邻甲(乙)氧基苯酚的催化性能。其中,磷酸盐系催化剂是目标反应中催化性能较好的催化剂,其转化率和选择性可达到90%以上,寿命可达2000h以上,有希望应用于工业生产。简要说明了该反应的机理研究情况,弱酸-弱碱中心的共同存在对反应更有利。更多还原

【Abstract】 Progress in vapour-phase synthesis of guaiacol(guathol)from catechol,catalysts for the reaction and the reaction mechanism study are reviewed.Catalysts for the reaction,including kaolin,hydrotalcite,oxide,molecular sieve,phosphate are particularly summarized.Phosphate catalysts showed the highest catalytic performance,both catechol conversion and guaiacol(or guathol) selectivity were higher than 90%,and the catalyst kept stable for longer than 2000 h,which exhibited a foreground for industrial application.The mechanism study revealed that the weak acidic-basic characteristics of the catalysts may account for the high selectivity and the excellent durability.更多还原