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Fe_2O_3催化甲基化合成2,3,5-三甲基苯酚及其失活的研究    

Vapor phase synthesis of 2,3,5-trimethyl phenol over iron catalyst and deactivation of the catalyst

文献类型:期刊文献

中文题名:Fe_2O_3催化甲基化合成2,3,5-三甲基苯酚及其失活的研究

英文题名:Vapor phase synthesis of 2,3,5-trimethyl phenol over iron catalyst and deactivation of the catalyst

作者:顾金泉[1];黄晴[1];刘纯山[1]

机构:[1]华东理工大学催化研究所,上海200237

年份:2006

卷号:14

期号:12

起止页码:51

中文期刊名:工业催化

外文期刊名:Industrial Catalysis

收录:CSTPCD

语种:中文

中文关键词:3,5-二甲基苯酚;2,3,5-三甲基苯酚;气相甲基化;氧化铁;催化剂失活

外文关键词:3,5-dimethyl phenol ; 2,3,5-trimethyl phenol ; vapor phase methylation ; Fe2 03 catalyst ; cata- lyst deactivation

摘要:制备并考察了甲醇甲基化法合成2,3,5-三甲基苯酚的固体酸催化剂,进行了甲基化反应工艺条件的优化研究。实验结果表明,最优工艺条件:反应温度370℃、液空速0.2 h-1、n(3,5-二甲基苯酚)∶n(甲醇)∶n(水)=1∶2∶1;原料3,5-二甲基苯酚的转化率达95.96%,目的产物2,3,5-三甲基苯酚的收率为72.01%。并采用XRD、SEM、DTA和TG等测定方法对催化剂进行了研究,发现催化剂表面上积炭污染是造成催化剂活性下降的主要原因。
Vapor phase synthesis of 2,3,5-trimethyl phenol from methanol and 3,5-dimethyl-phenol over solid acid catalyst was studied in a fixed bed reactor. Effects of temperature, molar ratio of the feed (3, 5-dimethyl-phenol, methanol and water) and space velocity were investigated. The optimum process condition was as follows :reaction temperature 370 ℃, space velocity 0.2 h-1, and n(3,5-dimethyl phenol) : n (methanol) : n (water) = 1 : 2 : 1. 3,5-dimethyl-phenol conversion of 95.96% and 2,3,5-trimethyl phenol yield of 72.01% was obtained under the optimal condition. The catalyst was characterized by XRD, DTA, TG and SEM techniques. The results showed that coke formation was the main cause for catalyst deactivation.

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