Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-02T21:07:39.411Z Has data issue: false hasContentIssue false
  • English
  • Français

Natural zeolites for styrene oligomerization

Published online by Cambridge University Press:  09 July 2018

S. Kowalak  and
A. Jankowska
S. Kowalak*
Affiliation:
Faculty of Chemistry, A. Mickiewicz University, Faculty of Chemistry, Grunwaldzka 6, 60780 Poznań, Poland
A. Jankowska
Affiliation:
Faculty of Chemistry, A. Mickiewicz University, Faculty of Chemistry, Grunwaldzka 6, 60780 Poznań, Poland
*
*E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Hydrogen forms of natural mordenite and clinoptilolite were used as catalysts for styrene oligomerization and as matrices to hold the resultant oligomers in order to prepare intense and light-resistant pigments. In contrast to synthetic zeolites of similar pore sizes (mainly H-ZSM-5, H-mordenite), the natural zeolites did not form products with an intense (pink) colouration. H-mordenite samples treated with styrene developed some colour due to styrene oligomers (the chromophore) whereas, in treated clinoptilolites, colour formation was negligible due to the lack of access of styrene molecules into the elliptical channels. The results of catalytic tests for cracking of cumene (cumene and styrene have similar molecular sizes) were consistent with the styrene oligomerization results. They indicate a noticeable catalytic activity with natural H-mordenite and a lack of activity with clinoptilolite. On the other hand, catalytic tests for propan-2-ol decomposition indicate a high activity with both natural zeolites, which confirms the presence of acid sites and their accessibility to small alcohol molecules.

Keywords

natural zeolitesmordeniteclinoptilolitestyrene oligomerizationcumene crackingpigments
Type
Research Article
Information
Clay Minerals , Volume 46 , Issue 2 , June 2011 , pp. 189 - 195
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Dubinin, M.M., Lozhkova, N.S. & Onusaitis, B.A. (1976) Special features of the adsorption properties of clinoptilolite. Russian Chemical Bulletin, 25, 713–716.CrossRefGoogle Scholar
Kowalak, S., Pawlowska, M., Więckowski, A.B. & Goslar, J. (1994) Polymerization inside the molecular sieves. Studies in Surface Sciences and Catalysis, 83, 179–185.Google Scholar
Kowalak, S., Jankowska, A., Pietrzak, N. & Stróżyk, M. (2001) Application of the molecular sieves as matrices for the pigments. Studies in Surface Sciences and Catalysis, 135, 363–368.Google Scholar
Stavitski, E., Kox, M.H.F. & Weckhuysen, B.M. (2007) Non-uniform catalytic behavior of zeolite crystals as revealed by in-situ optical micro-spectroscopy. Pp. 346–354 in: Advanced Micro-and Mesoporous Materials (Hadjivanov, K., Valtchev, V., Mintova, S., & Vayssilov, G., editors), Herron Press, Sofia, Bulgaria.Google Scholar
Vezzalini, G., Quartieri, S., Galli, E., Alberti, A., Cruciani, G. & Kvick, A. (1997) Crystal structure of the zeolite mutinaite, the natural analog of ZSM-5. Zeolites, 19, 323–325.Google Scholar