DOI: 10.1002/adsc.200505107. Liquid Phase Oxidation of Toluene to Benzaldehyde with Molecular Oxygen over Copper‐Based Heterogeneous Catalysts

Liquid Phase Oxidation of Toluene to Benzaldehyde with Molecular Oxygen over Copper‐Based Heterogeneous Catalysts

10.1002/adsc.200505107

Crossref journal-article

Wiley

Advanced Synthesis & Catalysis (311)

Abstract

AbstractWe conducted the liquid phase oxidation of toluene with molecular oxygen over heterogeneous catalysts of copper‐based binary metal oxides. Among the copper‐based binary metal oxides, iron‐copper binary oxide (Fe/Cu=0.3 atomic ratio) was found to be the best catalyst. In the presence of pyridine, overoxidation of benzaldehyde to benzoic acid was partially prevented. As a result, highly selective formation of benzaldehyde (86% selectivity) was observed after 2 h of reaction (7% conversion of toluene) at 463 K and 1.0 MPa of oxygen atmosphere in the presence of pyridine. These catalytic performances were similar or better than those in the gas phase oxidation of toluene at reaction temperatures higher than 473 K and under 0.5–2.5 MPa. It was suggested from competitive adsorption measurements that pyridine could reduce the adsorption of benzaldehyde. At a long reaction time of 4 h, the conversion increased to 25% and benzoic acid became the predominant reaction product (72% selectivity) in the absence of pyridine. The yield of benzoic acid was higher than that in the Snia‐Viscosa process, which requires corrosive halogen ions and acidic solvents in the homogeneous reaction media. The catalyst was easily recycled by simple filtration and reusable after washing and drying.

Bibliography

Wang, F., Xu, J., Li, X., Gao, J., Zhou, L., & Ohnishi, R. (2005). Liquid Phase Oxidation of Toluene to Benzaldehyde with Molecular Oxygen over CopperâBased Heterogeneous Catalysts. Advanced Synthesis & Catalysis, 347(15), 1987â1992. Portico.

Authors 6

Feng Wang (first)
Jie Xu (additional)
Xiaoqiang Li (additional)
Jin Gao (additional)
Lipeng Zhou (additional)
Ryuichiro Ohnishi (additional)

References 25 Referenced 113

{'key': 'e_1_2_1_1_2', 'volume-title': 'Fine Chemicals through Heterogeneous Catalysis', 'author': 'Sheldon R. A.', 'year': '2001'} / Fine Chemicals through Heterogeneous Catalysis by Sheldon R. A. (2001)
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F. Bruhne E. Wright Ullmann's Encyclopedia of Technical Chemistry 6th edn. 1998 Electronic Release (benzaldehyde entry).
10.1006/jcat.1998.2076
{'key': 'e_1_2_1_12_2', 'first-page': '138', 'volume': '98', 'author': 'Lars S.', 'year': '1988', 'journal-title': 'J. Catal.'} / J. Catal. by Lars S. (1988)
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{'key': 'e_1_2_1_16_2', 'first-page': '210', 'volume': '134', 'author': 'Snia‐Viscosa', 'year': '1977', 'journal-title': 'Hydrocarbon Proc.'} / Hydrocarbon Proc. by Snia‐Viscosa (1977)
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Dates

Type	When
Created	19 years, 9 months ago (Dec. 2, 2005, 8:17 a.m.)
Deposited	1 year, 9 months ago (Nov. 16, 2023, 10:51 p.m.)
Indexed	1 week, 1 day ago (Aug. 29, 2025, 6:19 a.m.)
Issued	19 years, 9 months ago (Dec. 1, 2005)
Published	19 years, 9 months ago (Dec. 1, 2005)
Published Online	19 years, 9 months ago (Dec. 2, 2005)
Published Print	19 years, 9 months ago (Dec. 1, 2005)

Funders 0

None

BibTeX

@article{Wang_2005, title={Liquid Phase Oxidation of Toluene to Benzaldehyde with Molecular Oxygen over Copper‐Based Heterogeneous Catalysts}, volume={347}, ISSN={1615-4169}, url={http://dx.doi.org/10.1002/adsc.200505107}, DOI={10.1002/adsc.200505107}, number={15}, journal={Advanced Synthesis & Catalysis}, publisher={Wiley}, author={Wang, Feng and Xu, Jie and Li, Xiaoqiang and Gao, Jin and Zhou, Lipeng and Ohnishi, Ryuichiro}, year={2005}, month=dec, pages={1987–1992} }

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