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Investigation of batch alkene epoxidations catalyzed by polymer-supported Mo(VI) complexes
journal contribution
posted on 2009-06-19, 09:20 authored by Krzysztof Ambroziak, Rene Mbeleck, Yue He, Basu Saha, David C. SherringtonPolymer supported Mo(VI) catalysts (PBI.Mo and Ps.AMP.Mo) have been prepared and characterised.
The activities of both of these catalysts in epoxidation of alkenes (e.g. cyclohexene; 1-octene;
limonene; α-pinene) with dry tert-butyl hydroperoxide (TBHP) as oxidant have been studied under
different reaction conditions in a batch reactor. The long-term stability and Mo leaching of each
polymer catalyst was also assessed by recycling a sample in batch reaction using conditions that will
form the basis of a continuous process. Both catalysts have been shown to be sufficiently stable to be
considered as real candidates for use in such a process. In the case of the PBI.Mo catalyst the order of
reactivity of the alkenes was found to be: cyclohexene>limonene>α-pinene>1-octene. “Wet” TBHP
can also be used for cyclohexene epoxidation catalysed by PBI.Mo without any significant decrease in
the final TBHP conversion. In the case of limonene epoxidation, however, the presence of water
reduced the TBHP conversion and also affected the cis-trans ratio of the main product 1,2-limonene
epoxide. The reusability studies with PBI.Mo revealed that the largest fall in the final TBHP
conversion was observed for α-pinene epoxidation amongst the alkenes studied. For 1-octene
epoxidation the loss of Mo from each support has been investigated by isolating any residue from the
reaction supernatant solutions, following removal of the heterogeneous polymer catalyst, and then
using the residues as potential catalysts in epoxidation reactions.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
Citation
AMBROZIAK, M....et al., 2009. Investigation of batch alkene epoxidations catalyzed by polymer-supported Mo(VI) complexes. Industrial and Engineering Chemistry Research, 48 (7), pp 3293–3302.Publisher
© American Chemical SocietyVersion
- AM (Accepted Manuscript)
Publication date
2009Notes
This article is Restricted Access. It was published in the journal,Industrial & Engineering Chemistry Research [© American Chemical Society] and is available at: http://dx.doi.org/10.1021/ie801171sISSN
0888-5885Language
- en