水蒸气存在下呋喃和氨反应制备吡咯

引　言吡咯是医药、化工等行业的重要中间体 ,具有广泛的用途1,2 ] .除了作为药物合成基本原料外 ,近年来在工业上作为新型的高分子单体 ,在制备导电性高聚物、生物传感器、电磁屏蔽、抗静电涂层、微波吸收材料等方面有着广泛的应用前景3 ,4 ] .因而对其需求日益增加 ,但吡咯

PREPARATION OF PYRROLE FROM FURAN AND AMMONIA WITH PRESENCE OF WATER VAPOR

Using aluminium silicate-composing catalyst，pyrrole was prepared from furan and ammonia by intra-annular heteroatomic substitution reaction with presence of water vapor. As for the preparation of aluminium silicate-composing catalyst，the effect of various technical parameters and promotor action on the catalytic performance were observed. As Shoun by the experimental result，a catalyst，which showed better activity and selectivity than others， was obstained under the following preparative conditions: calcining temperature 600 ℃，pH value range 2.5～3.2，gelating time 5h and alumina content 10%～25%(m). Furthermore，adding cadmium oxide in a minor amount as a promotor also improved the catalytic performance. For the substitutive reaction，the reaction conditions were examined. As indicated，the optimal result of yield 89.2%，conversion 90.2%，selectivity 98.7% was accomplished with reaction temperature 420 ℃，molar ratio 1∶8∶37(C₄H₄O∶NH₃∶H₂O)， and the liquid hourly space velocity of furan 0.20 h^-1.