苯胺在Hβ分子筛上的甲基化反应  

ANILINE METHYLATION OVER Hβ MOLECULAR SIEVES

作　　者：李国弢[1] 关乃佳[1] 刘述全[1] 张怀彬[1] 

机构地区：[1]南开大学化学系,天津300071

出　　处：《石油学报（石油加工）》2001年第4期71-76,共6页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：考察了不同温度水蒸气处理的 Hβ分子筛在苯胺甲基化反应中的催化性能 ,及其在不同反应温度、不同进料空速下的变化。结果表明 ,在苯胺甲基化过程中 ,催化剂酸性起了重要作用 ,N-甲基化反应所需的催化活性中心为较弱的酸性中心 ,C-甲基化反应所需的催化活性中心为较强的酸性中心。较高的反应温度有利于 C-甲基化产物的生成 ,较低的反应温度有利于Methylation of aniline with methanol over hydrothermal treated H β molecular sieves in vapor phase was studied. The reaction was also investigated by varying reaction temprature and MHSV. Catalyst acidity played an important role in the methylation of aniline. N methylation of aniline occurred on weaker acid sites of catalyst, while C methylation of aniline occurred on stronger acid sites. Within the range of 240～340 ℃, higher temperature favored the formation of C methylated products and lower temperature favored the formation of N methylated products.

关 键 词：HΒ分子筛 苯胺 N-甲基化 C-甲基化 水蒸气处理 

分 类 号：TQ246.31[化学工程—有机化工] TQ424.25