Kinetics and mechanism of liquid-phase alkylation of 3-methylthiophene with 2-methyl-2-butene over a solid phosphoric acid
Kinetics and mechanism of liquid-phase alkylation of 3-methylthiophene with 2-methyl-2-butene over a solid phosphoric acid
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DOI：
10.1016/j.apcatb.2005.11.011
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发表时间：
2006-05
影响因子：
22.1
通讯作者：
V. Bellière;C. Lorentz;C. Geantet;Y. Yoshimura;D. Laurenti;M. Vrinat
中科院分区：
文献类型：
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作者：
V. Bellière;C. Lorentz;C. Geantet;Y. Yoshimura;D. Laurenti;M. Vrinat
关于燃料中硫含量的严格规定要求炼油厂开发新工艺。对于汽油，提出了基于噻吩与丁烯烷基化的AOTS工艺。在目前的工作中，我们试图用模型分子来描述这种反应的机理。以负载磷酸为催化剂，对3-甲基噻吩与2-甲基-2-丁烯的液相烷基化反应进行了研究。结果表明，该反应主要对单烷基化产物具有选择性。反应动力学符合Eley-Rideal定律，反应中间体可能是磷酸酯或多磷酸酯。
Drastic regulations concerning sulfur content in fuels require the development of new processes in the refineries. In the case of gasoline, AOTS process based on the alkylation of thiophene by butenes was proposed. In the present work, we attempted to describe the mechanism of such a reaction with model molecules. Liquid-phase alkylation of 3-methylthiophene with 2-methyl-2-butene was performed on supported phosphoric acid. It is shown that this reaction is mainly selective to monoalkylation products. The kinetics is following an Eley–Rideal law and the reaction intermediate seems to be an ester of phosphoric acid or polyphosphate.