The present invention relates to a method for producing cresol from phenol and methanol via gas phase alkylation, in which phenol and methanol are preheated and mixed with diluent gas, then the mixture continuously go through a catalyst bed comprising the catalyst for alkylation of phenol with methanol, to produce cresol by gas phase reaction at the reaction temperature of 200-500° C. and the weight hourly space velocity of 0.5˜20 h
−1
. The catalyst for alkylation of phenol with methanol is obtained by modification steps and using ZSM-5 zeolite, MCM-22 zeolite or Beta zeolite as an active composition. Using phenol and methanol as feedstock, the cresol selectivity can reach to 90%, and the p-cresol selectivity can reach to 58%. The catalyst is environmental friendly and non-corrosive to the equipment with a good stability and a broad prospect in industrial application.
本发明涉及一种通过气相烷基化从
苯酚和
甲醇生产甲基
苯酚的方法,其中
苯酚和
甲醇被预热并与稀释气体混合,然后混合物连续通过催化剂床,该催化剂用于
苯酚和
甲醇的烷基化反应,以在反应温度为200-500°C和重量小时空间速度为0.5-20 h-1的条件下通过气相反应生产甲基
苯酚。
苯酚和
甲醇的烷基化催化剂经过改性步骤获得,使用ZSM-5
沸石、MCM-22
沸石或Beta
沸石作为活性成分。使用
苯酚和
甲醇作为原料,甲基
苯酚选择性可达90%,对甲
苯酚的选择性可达58%。该催化剂环保,对设备无腐蚀性,稳定性好,在工业应用中具有广阔的前景。