Evaluation of silanization of Fe-silicalite-1, Na-Fe-ZSM-5 and solvent concentration on the oxidation of n-octane to C8 oxygenates

Cele, Mduduzi N.; Friedrich, Holger B.; Bala, Muhammad D.

doi:10.1007/s10934-019-00731-z

Cited by 2 publications

(1 citation statement)

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“…This process suffers from the lack of selectivity, harsh reaction conditions, and the forming of environmentally unfriendly products like CO and CO 2 . To overcome this issue, the research was focused on the oxidation of alkenes through homogeneous and heterogeneous catalysis under the mild reaction conditions using the oxidants like H 2 O 2 , TBHP and NaIO 4 etc [8][9][10] . During this process the oxidative cleavage of C = C bond was more favoured when compared to the selective oxidation or epoxidation of alkene, resulting in a low selectivity to terminal oxidation products 11 .…”

Section: Introductionmentioning

confidence: 99%

Pyrithione Metal (Cu, Ni, Ru) Complexes as Photo-Catalysts for Styrene Oxide Production

Dasireddy

Kladnik

Korošec

et al. 2021

Preprint

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Selective photochemical oxidation of styrene was performed in an active acetonitrile medium, using H2O2 with or without ultraviolet (UV) light radiation. Pyrithione metal complexes (M–Pth: M = Cu(II), Ni(II), Ru(II); Pth = 2-mercaptopyridine-N-oxide) were used as catalysts. Catalytic testing measurements were done by varying the time, chemical reaction temperature and H2O2 concentration with or without UV energy. Epoxide styrene oxide (SO), benzaldehyde and acetophenone were the major synthesized products. A high batch rate, conversion and selectivity towards SO was shown in the presence of UV. A minor constant formation of CO2 was observed in the stream. Coordinated Ru-based compounds demonstrated the highest process productivity of SO at 60 °C. The effect of the functional alkyl substituent on the ligand Pth, attached to the specific ruthenium(II) centre, decreased the activity of the substance. Ni-Pth selectively yielded benzaldehyde. The stability of the catalysts was examined by applying nuclear magnetic resonance (NMR) spectroscopy and thermogravimetric analysis coupled with mass spectrometry. Tested metal complexes with pyrithione (M–Pth) exhibited excellent reuse recyclability up to 3 cycles.

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