3,5-二甲基苯酚甲基化合成2,3,5-三甲基苯酚的铁系催化剂研究

研究了3,5-二甲基苯酚甲醇气相催化甲基化合成2,3,5-三甲基苯酚的铁系催化剂。以Fe₂O₃为主催化剂，并通过添加Cr₂O₃、MgO、MnO、PbO₂和ZnO等为助催化剂进行性能调变。考察了催化剂组成、助催化剂含量和催化剂负载量对活性的影响。结果表明，Fe₂O₃为主催化剂，MnO和Cr₂O₃为助催化剂，Fe₂O₃、 MnO 和Cr₂O₃物质的量比为1∶0.1∶0.02,负载主、副催化剂质量分数10%效果最佳。催化剂用XRD、BET和TPD进行了表征。

Study on iron catalyst for synthesis of 2,3,5-trimethyl phenol from 3,5-dimethyl phenol

The catalytic performance of Fe-based catalysts for synthesis of 2,3,5-trimethyl phenol from 3,5-dimethyl phenol and methanol was studied. Fe₂O₃ was confirmed as the main active phase. The catalyst activity was adjusted by doping MnO, MgO, Cr₂O₃, PbO₂,and ZnO as promoters. The Influence factors on the catalytic activity were investigated. The results showed that the catalyst using Fe₂O₃ as main active phase, MnO and Cr₂O₃ as the promoters with the molar ratio of Fe2O3, MnO and Cr₂O₃ of 1∶0.1∶0.02 and the catalyst loading of 10%(mass fraction) had the best catalytic activity. The catalyst was characterized by XRD,BET and TPD techniques.