Abstract
The deactivation and regeneration of the lamina titanium silicalite (TS-1) catalyst for the epoxidation of propylene with dilute H2O2was investigated in a fixed-bed reactor. In the scale-up experiment, the dosage of the lamina TS-1 catalyst is 2. 5 kg, after 1000 h reaction the catalyst still exhibits good performance and further increases the reaction time, the conversion of H2O2begins to decrease. TG and BET analyses of the deactivated catalysts show that the main species occluded within the zeolite pore are propylene oxide oligomers, and these species occupying the active Ti site and blocking the pores of the lamina TS-1 are the main reason for the deactivation of catalyst. The deactivated catalyst can be regenerated by different regeneration methods. The activity of deactivated catalysts regenerated by dilute H2O2or heat treatment by using air or nitrogen as a calcination media can be fully recovered, but a decline in propylene oxide (PO) selectivity of the regenerated catalyst has been observed during the first hours of reaction. However, water vapor treatment of the deactivated catalyst can improve the PO selectivity with the same activity as that of the fresh lamina TS-1 catalyst.
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References
R. O. Kirk and T. J. Dempsey in:Kirk-Othmer Encyclopedia of Chemical Technology,Vol. 19,eds. M. Grayson, D. Eckroth, H. F. Mark, D. F. Othmer, C. G. Overberger and G. T. Seaborg Vol. 19,(Wiley New York,1982)pp. 246.
H. P Wullf and F. Wattimenu,US Patent 4021454 (1977)to Shell Oil Company.
M. Taramasso, G. Perego and B. Notari,US Patent 4410501 (1983).
U. Romano, A. Esposito, F. Maspero, C. Neri and M. G. Clerici, Chim. Ind. (Milan)72 (1990)610.
M. G. Clerici, G. Bellussi and U. Romano,J. Catal. 129 (1991) 159.
P. Roffia, G. Leofanti, A. Cesana, M. Mantegazza, M. Padovan, G. Petrini, S. Tonti and P. Gervasutti,Chim. Ind. (Milan)72 (1990)598.
M. G. Clerici,Appl. Catal. A 68 (1991)249.
M. A. Mantegazza, G. Leofanti, G. Petrini, M. Padovan, A. Zecchina and S. Bordiga,Stud. Surf. Sci. Catal. 82 (1994)541.
S. Tonti, P. Roffia, A. Cesana, M. A. Mantegazza and M. Padovan, US Patent 4918194 (1990).
G. Li, X. S. Wang, H. S. Yan, Y. H. Liu and X. W. Liu,Appl. Catal. A 236 (2002)1.
C. Perego, A. Carati and P. Ingallina, Appl. Catal. A 221 (2001) 63.
G. J. Crocco and J. G. Zajacek,US Patent 5741749 (1998).
K. M. Carroll, H. E. Morales and Y. Z. Han,US Patent 5798313 (1998).
J. P. Catinat and M. Strebelle,US Patent 6169050B1 (2001).
G. Heinrich, Grosch, US Patent 20020082159 (2002). Please provide the rst name for the author Grosch
M. A. Mantegazza,US Patent 6403514 (2002).
G. Thiele, US Patent 5675026 (1997).
G. Thiele, US Patent 5620935 (1997).
P. Gilbeau, WO Patent 9818555 (1998).
K. M. Carroll, H. E Morales and Y. Z. Han, US Patent 5916835 (1999).
D. Shaumont, WO Patent 9901445 (1999).
T. Chang, EP Patent 1190770A1 (2002).
G. Li, X. W. Guo, X. Sh. Wang, Q. Zhao, X. H. Bao, X. W. Han and L. W. Lin, Appl. Catal. A 185 (1999) 11.
X. Sh. Wang, G. Li, H. S. Yan and X. W. Guo,Stud. Surf. Sci. Catal. 135 (2001)273.
G. R. Wang and X. Sh. Wang,Petrochem. Tech. (China)16 (1987) 616.
G. F. Thiele and E. Roland,J. Mol. Catal. A 117 (1997)351.
G. Perego, G. Bellussi, C. Corno, M. Taramasso, F. Buonomo and A. Esposito,Stud. Surf. Sci. Catal. 28 (1986)129.
D. Scarano, A. Zecchina, S. Bordiga, F. Geobaldo and G. Spoto, J. Chem. Soc. ,Faraday Trans. 89 (1993)4123.
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Liu, X., Wang, X., Guo, X. et al. Regeneration of Lamina TS-1 Catalyst in the Epoxidation of Propylene with Hydrogen Peroxide. Catalysis Letters 97, 223–229 (2004). https://doi.org/10.1023/B:CATL.0000038588.57599.c7
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DOI: https://doi.org/10.1023/B:CATL.0000038588.57599.c7