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Photochlorination of toluene – the thin line between intensification and selectivity. Part 1: intensification and effect of operation conditions

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Abstract

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.

Graphical abstract: Photochlorination of toluene – the thin line between intensification and selectivity. Part 1: intensification and effect of operation conditions

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Article information


Submitted
22 Jun 2020
Accepted
06 Oct 2020
First published
07 Oct 2020

React. Chem. Eng., 2020, Advance Article
Article type
Paper

Photochlorination of toluene – the thin line between intensification and selectivity. Part 1: intensification and effect of operation conditions

Ü. Taştan and D. Ziegenbalg, React. Chem. Eng., 2020, Advance Article , DOI: 10.1039/D0RE00263A

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