Photochlorination of toluene – the thin line between intensification and selectivity. Part 1: intensification and effect of operation conditions,Reaction Chemistry & Engineering

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Photochlorination of toluene – the thin line between intensification and selectivity. Part 1: intensification and effect of operation conditions
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2020-10-7 , DOI: 10.1039/d0re00263a
Ümit Taştan _{1,

2,

3,

4} , Dirk Ziegenbalg _{1,

2,

3,

4}

Affiliation

This work reports on the potentials of intensifying the industrially applied side-chain photochlorinations of toluene. The application of microstructured reactors enabled an acceleration of the overall reaction up to 10 times compared to batch reactors and up to 100 times compared to the literature. Unexpectedly, this acceleration is accompanied by a decreased selectivity with respect to the desired side-chain chlorinated products. In contradiction to the in general well established theory of photochlorinations, significant amounts of ring chlorinated species were detected. By applying dynamic irradiation conditions, not only the formation of ring-chlorinated products was suppressed but also the energy consumption could be reduced significantly.

中文翻译：

甲苯的光氯化作用–增强作用与选择性之间的细线。第1部分：操作条件的强化和影响

这项工作报告了加强工业应用的甲苯侧链光氯化反应的潜力。与间歇式反应器相比，微结构反应器的应用可使整体反应加速多达10倍，与文献相比，加速了高达100倍。出乎意料的是，这种加速伴随着相对于所需的侧链氯化产物的选择性降低。与一般公认的光氯化理论相矛盾，检测到大量的环氯化物。通过施加动态辐照条件，不仅可以抑制环氯化产物的形成，而且可以显着降低能耗。

更新日期：2020-12-10

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