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Production of Benzene by the Hydrodemethylation of Toluene with Carbon‐Supported Potassium Hydride
The hydrodemethylation (HDM) of toluene to benzene is an industrial process performed at elevated temperatures (≈500 °C and higher). Here, it was reported that heating graphite‐supported potassium hydride (KH/C) with toluene under H(2) atmosphere provided benzene already at 125–250 °C. Depending on...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10107743/ https://www.ncbi.nlm.nih.gov/pubmed/36445808 http://dx.doi.org/10.1002/cssc.202202029 |
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author | Chang, Fei Fedorov, Alexey |
author_facet | Chang, Fei Fedorov, Alexey |
author_sort | Chang, Fei |
collection | PubMed |
description | The hydrodemethylation (HDM) of toluene to benzene is an industrial process performed at elevated temperatures (≈500 °C and higher). Here, it was reported that heating graphite‐supported potassium hydride (KH/C) with toluene under H(2) atmosphere provided benzene already at 125–250 °C. Depending on the H(2) pressure, the reaction was either substoichiometric ( ≤11 bar) or catalytic ( ≥50 bar) with respect to KH, indicating that KH may serve as a radical chain initiator. At 250 °C, the selectivity to benzene was 98 and 63 % when using 6 and 80 bar of H(2), respectively, owing to the competing formation of cyclohexane and methylcyclohexane at high H(2) pressure. The used KH/C material was amenable to recycling without a notable loss in the yield of benzene. |
format | Online Article Text |
id | pubmed-10107743 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-101077432023-04-18 Production of Benzene by the Hydrodemethylation of Toluene with Carbon‐Supported Potassium Hydride Chang, Fei Fedorov, Alexey ChemSusChem Research Articles The hydrodemethylation (HDM) of toluene to benzene is an industrial process performed at elevated temperatures (≈500 °C and higher). Here, it was reported that heating graphite‐supported potassium hydride (KH/C) with toluene under H(2) atmosphere provided benzene already at 125–250 °C. Depending on the H(2) pressure, the reaction was either substoichiometric ( ≤11 bar) or catalytic ( ≥50 bar) with respect to KH, indicating that KH may serve as a radical chain initiator. At 250 °C, the selectivity to benzene was 98 and 63 % when using 6 and 80 bar of H(2), respectively, owing to the competing formation of cyclohexane and methylcyclohexane at high H(2) pressure. The used KH/C material was amenable to recycling without a notable loss in the yield of benzene. John Wiley and Sons Inc. 2022-12-12 2023-01-20 /pmc/articles/PMC10107743/ /pubmed/36445808 http://dx.doi.org/10.1002/cssc.202202029 Text en © 2022 The Authors. ChemSusChem published by Wiley-VCH GmbH https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
spellingShingle | Research Articles Chang, Fei Fedorov, Alexey Production of Benzene by the Hydrodemethylation of Toluene with Carbon‐Supported Potassium Hydride |
title | Production of Benzene by the Hydrodemethylation of Toluene with Carbon‐Supported Potassium Hydride |
title_full | Production of Benzene by the Hydrodemethylation of Toluene with Carbon‐Supported Potassium Hydride |
title_fullStr | Production of Benzene by the Hydrodemethylation of Toluene with Carbon‐Supported Potassium Hydride |
title_full_unstemmed | Production of Benzene by the Hydrodemethylation of Toluene with Carbon‐Supported Potassium Hydride |
title_short | Production of Benzene by the Hydrodemethylation of Toluene with Carbon‐Supported Potassium Hydride |
title_sort | production of benzene by the hydrodemethylation of toluene with carbon‐supported potassium hydride |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10107743/ https://www.ncbi.nlm.nih.gov/pubmed/36445808 http://dx.doi.org/10.1002/cssc.202202029 |
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