Adsorptive separation of methylalumoxane by mesoporous molecular sieve MCM-41

Abstract

Separation of methylalumoxane (MAO) by adsorption on siliceous porous materials with different average pore diameters has been carried out; polymerization of ethylene was conducted with Cp₂ZrCl₂ using the separated MAO as cocatalyst, it was found that the MAO adsorbed on MCM-41 with average pore size of ca. 25 Å is very effective for ethylene polymerization.

References

1. M. R. Mason, J. M. Smith, S. G. Bott and A. R. Barron, J. Am. Chem. Soc., 1993, 115, 4971.
2. A. R. Barron, Macromol. Symp., 1995, 97, 15.
3. H. Shin, Macromol. Symp., 1995, 97, 27.
4. See for example; J. C. W. Chien and D. He, J. Polym. Sci. Part A, Polym. Chem., 1991, 29, 1603; K. Soga and M. Kaminaka, Macromol. Chem. Rapid. Commun., 1992, 13, 221; W. Kaminsky and F. Renner, Macromol. Chem. Rapid. Commun., 1993, 14, 239; F. Ciardelli, A. Altomare, G. Counti, G. Arribas, B. Mendez and A. Ismayel, Macromol. Chem. Macromol. Symp., 1994, 80, 29; T. Tudor and D. O'Hare, Chem. Commun., 1997, 603.
5. J. S. Beck, J. C. Vartuli, W. J. Roth, M. E. Leonowicz, C. T. Kresge, K. D. Schmitt, C. T.-W. Chu, D. H. Olson, E. W. Sheppard, S. B. MacCullen, J. B. Higgins and J. L. Schlenker, J. Am. Chem. Soc., 1992, 114, 10834.
6. J. M. Kim, J. H. Kwak, S. Jun and R. Ryoo, J. Phys. Chem., 1995, 99, 16742.
7. S. Namba, A. Mochizuki and M. Kito, Stud. Surf. Sci. Catal., 1998, 117, 257.
8. D. W. Imhoff, L. S. Simeral, S. A. Sangokoya and J. H. Peel, Organometallics, 1998, 17, 1941.
9. W. Hagendorf, A. Harder and H. Sinn, Macromol. Symp., 1995, 97, 127.
10. I. Tritto, M. C. Sacchi and S. Li, Macromol. Chem. Rapid. Commun., 1994, 15, 217.
11. L. K. Van Looveren, D. F. Geysen, K. A. Vercruysse, B. H. Wouters, P. J. Grobet and P. A. Jacobs, Angew. Chem., Int. Ed., 1998, 37, 517.