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Peng L, Liu C, Li N, Zhong W, Mao L, Kirk SR, Yin D. Direct cyclohexanone oxime synthesis via oxidation-oximization of cyclohexane with ammonium acetate. Chem Commun (Camb) 2020; 56:1436-1439. [PMID: 31913370 DOI: 10.1039/c9cc09840b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
An unexpected cascade reaction for oxidation-oximization of cyclohexane with ammonium acetate was developed for the first time to access cyclohexanone oxime with 50.7% selectivity (13.6% conversion). Tetrahedral Ti sites in Ni-containing hollow titanium silicalite can serve as bifunctional catalytic centers in the reaction. This methodology not only provides a direct approach to prepare cyclohexanone oxime, but also simplifies process chemistry. Various available nitrogen sources, such as ammonium salt and even ammonia can be used as starting materials.
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Affiliation(s)
- Ling Peng
- National & Local United Engineering Laboratory for New Petrochemical Materials & Fine Utilization of Resources, Key Laboratory of Chemical Biology Traditional Chinese Medicine Research Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
| | - Chan Liu
- National & Local United Engineering Laboratory for New Petrochemical Materials & Fine Utilization of Resources, Key Laboratory of Chemical Biology Traditional Chinese Medicine Research Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
| | - Na Li
- National & Local United Engineering Laboratory for New Petrochemical Materials & Fine Utilization of Resources, Key Laboratory of Chemical Biology Traditional Chinese Medicine Research Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
| | - Wenzhou Zhong
- National & Local United Engineering Laboratory for New Petrochemical Materials & Fine Utilization of Resources, Key Laboratory of Chemical Biology Traditional Chinese Medicine Research Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
| | - Liqiu Mao
- National & Local United Engineering Laboratory for New Petrochemical Materials & Fine Utilization of Resources, Key Laboratory of Chemical Biology Traditional Chinese Medicine Research Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
| | - Steven Robert Kirk
- National & Local United Engineering Laboratory for New Petrochemical Materials & Fine Utilization of Resources, Key Laboratory of Chemical Biology Traditional Chinese Medicine Research Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
| | - Dulin Yin
- National & Local United Engineering Laboratory for New Petrochemical Materials & Fine Utilization of Resources, Key Laboratory of Chemical Biology Traditional Chinese Medicine Research Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
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Abstract
In this paper, five kinds of transition metal-modified titanium silicalite-1 (M-TS-1) were prepared by an ultrasonic impregnation method. We studied their catalytic performances in the ammoximation of methyl ethyl ketone (MEK). The various M-TS-1 catalysts revealed distinct differences in their MEK ammoximation activity. The nickel-modified TS-1 (Ni-TS-1), especially 3 wt % Ni-TS-1, exhibited a satisfactory conversion of MEK (99%) associated with a high selectivity of methyl ethyl ketoxime (MEKO) (99.3%), which was 6% higher than that of TS-1 under the same conditions. Moreover, the catalyst showed excellent recyclability and the reactivity could be completely recovered after regeneration. The catalysts were characterized by Powder X-ray Diffraction (XRD), Fourier Transformed Infrared Spectra (FT-IR), X-ray photoelectron spectroscopy (XPS), and so on. It was demonstrated that the skeleton structure of TS-1 was basically maintained and the electron environment of the Ti active site was changed after the nickel modification, which can optimize the adsorption capacity and the activation for H2O2. Meanwhile, the surface nickel species reduced the surface acidity of the catalyst, which provided an appropriate pH and inhibited the deep oxidation of oxime.
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Jin H, Meng C, He G, Guo X, Yang S. Green synthesis of acetaldehyde oxime using ammonia oxidation in the TS-1/H2O2 system. REACTION KINETICS MECHANISMS AND CATALYSIS 2018. [DOI: 10.1007/s11144-018-1440-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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