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Influence of toluene-tetramethylbenzene transalkylation on heavy aromatics conversion to xylenes

机译:甲苯-四甲基苯烷基转移对重芳烃转化为二甲苯的影响

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Transalkylation of toluene-tetramethylbenzene (TeMB) over MOR and BEA was investigated at 250-400 degrees C. Conversion of TeMB was higher than trimethylbenzene (TMB) and toluene. Xylene yield was in the following order: [toluene - TMB - TeMB) > [toluene - TeMB] > [toluene - TMB] [toluene]. Kinetic modeling for reaction network consisting of toluene-TeMB transalkylation; toluene disproportionation; and toluene-TMB transalkylation was carried out. Toluene-TeMB transalkylation rate was >50% higher than the toluene-TMB transalkylation while the toluene disproportionation was an order of magnitude slower than transallcylation reactions. An addition of 5-10 wt.% TeMBs to the heavy reformate caused minor impact on the xylene yield but an improvement in xylene selectivity. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译:在250-400℃下研究了MOR和BEA上的甲苯-四甲基苯(TeMB)烷基转移。TeMB的转化率高于三甲基苯(TMB)和甲苯。二甲苯产率按以下顺序排列:[甲苯-TMB-TeMB)> [甲苯-TeMB]> [甲苯-TMB] [甲苯]。甲苯-TeMB烷基转移反应网络的动力学模型;甲苯歧化;然后进行甲苯-TMB烷基转移。甲苯-TeMB烷基转移率比甲苯-TMB烷基转移率高50%以上,而甲苯歧化反应比烷基转移反应慢一个数量级。向重整重整产物中添加5-10重量%的TeMBs对二甲苯收率影响较小,但是对二甲苯选择性的改善。 (C)2014大韩工业化学工程学会。由Elsevier B.V.发布。保留所有权利。

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