Catalytic Properties of Chromium Complexes Based on 1,2-Bis(diphenylphosphino)benzene in the Ethylene Oligomerization Reaction
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The activity of the catalyst systems of a number of diphosphine ligands and chromium complexes based on 1,2-bis(diphenylphosphino)benzene in the ethylene oligomerization reaction has been studied. Structural modifications of diphosphine ligands have been performed to create selective catalyst systems for ethylene oligomerization. It has been shown that the introduction of ortho-functional groups into one of the phenyl substituents at the phosphorus atom in diphosphine ligands makes it possible to carry out the process of ethylene oligomerization to 1-hexene with the selectivity of 90 wt % and above. One of the complexes (chromium complex 15) with a functionalized diphosphine ligand has been characterized by X-ray structure analysis. The influence of the change in the amount of the activator and its type on the activity of the catalyst systems has been studied. It has been shown that the replacement of some organoaluminum activator, methylaluminoxane, by trimethylaluminum does not decrease the productivity and selectivity of the catalyst systems based on diphosphine chromium complexes.
Keywords:ethylene oligomerization diphosphine chromium complexes methylaluminoxane trimethylaluminum
The authors are grateful to the Center for Molecular Structure Investigation of the Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences for performing the X-ray structure analysis of compound 15.
CONFLICT OF INTEREST
The authors declare no conflict of interest to be disclosed in this paper.
- 1.Y. V. Kissin, in Kirk-Othmer Encyclopedia of Chemical Technology, 4th Ed. (Wiley, New York, 2005), vol. 17, p. 394.Google Scholar
- 2.C. Thammanayakatip, Asia Petrochemical Industry Conference (APIC) Linear Alpha Olefins (Nexant, 2017).Google Scholar
- 4.K. A. Alferov, G. P. Belov, and Y. Meng, Appl. Catal., A 542, 71 (2017).Google Scholar
- 5.H. F. Mark, Encyclopedia of Polymer Science and Technology, 3rd Ed. (Wiley–Interscience, Hoboken, 2007).Google Scholar
- 6.W. K. Reagan, EP Patent No. 30417477 (1991).Google Scholar
- 7.D. F. Wass, WO Patent No. 02/04119 (2002).Google Scholar
- 8.A. Carter, S. A. Cohen, N. A. Cooley, et al., Chem. Commun., No. 8, 858 (2002).Google Scholar
- 10.J. T. Dixon, P. Wasserscheid, D. S. McGuinness, et al., WO Patent No. 03053890 (2001).Google Scholar
- 11.S. Peitz, N. Peulecke, B. R. Aluri, et al., Eur. J. Inorg. Chem, No. 8, 1167 (2010).Google Scholar
- 12.M. J. Overett, K. Blann, A. Bollmann, et al., J. Mol. Catal., A 283, 114 (2008).Google Scholar
- 15.N. B. Bespalova, D. N. Cheredilin, A. M. Sheloumov, et al., RU Patent No. 2556636 (2014).Google Scholar
- 19.L. J. Ackerman, G. M. Diamond, K. A. Hall, et al., US Patent No. 2008/0188633 (2008).Google Scholar
- 20.U.-A. Schaper, Synthesis, No. 10, 794 (2981).Google Scholar
- 22.D. K. Dutta, B. Deb, G. Hua, and J. D. Woolins, J. Mol. Catal., A 353–354, 7 (2012).Google Scholar
- 25.APEX2 and SAINT (Bruker AXS, Madison, 2009).Google Scholar
- 27.M. J. Overett, K. Blann, A. Bollmann, et al., Chem. Commun., No. 5, 622 (2005).Google Scholar