Abstract
Study to get a high activity for olefin polymerization by a supporting Ziegler-type catalyst on MgCl2 was carried out. Only heating anhydrous MgCl2 with TiCl4, very little amount of TiCl4 was fixed because of high crystallinity and small surface of anhydrous MgCl2. A pretreatment by some organic electron donner such as butanol or methyl acetate before the reaction with TiCl4, resulted a considerable fixation of TiCl4 onto MgCl2 and gave high activity for ethylene polymerization by 70—90 times of conventional TiCl3 catalyst. The study of the TiCl4–MgCl2 comilling, the other supporting technique, was also investigated. There are efficient Ti and inefficient ones to participate in the formation of active species among the fixed Ti. The titanium fixed in the initial stage of milling at the active site of broken MgCl2 particle surface was rather efficient. Furthermore, The high stereospecificity was performed for propylene polymerization, by arranging some organic electron donner around Ti for the above mentioned TiCl4–MgCl2 catalyst.
Similar content being viewed by others
Article PDF
References
For example, H. W. Coover, Jr., J. E. Guillet, R. L. Combs, and F. B. Joyver, J. Polym. Sci., A-1, 4, 2583 (1966).
British Petrochemicals Co., Br. Patent 841,822 (1955).
Sun Oil, Co., U.S. Patent 3,153,634 (1956).
Cabot Co., Br. Patent 761—767, 969 (1960—1963).
Solvey & Cie Co., U.S. Patent 3400110 (1963).
Cossee, Tetrahed. Lett., 17, 12 (1960).
Montecatini Edison Co., Br. Patent 1286867 (1968).
Mitsui Petrochemicals Industries, Ltd., Italy Patent 912345 (1968).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kashiwa, N. Super Active Catalyst for Olefin Polymerization. Polym J 12, 603–608 (1980). https://doi.org/10.1295/polymj.12.603
Issue Date:
DOI: https://doi.org/10.1295/polymj.12.603
Keywords
This article is cited by
-
Synthesis and evaluation of a new three-metallic high-performance Ziegler–Natta catalyst for ethylene polymerization: experimental and computational studies
Polymer Bulletin (2022)
-
Progress in MgCl2 supported Ziegler-Natta catalyzed polyolefin products and applications
Journal of Polymer Research (2021)
-
Heterogeneous Ziegler–Natta catalysts with various sizes of MgCl2 crystallites: synthesis and characterization
Iranian Polymer Journal (2016)
-
Properties of thermoplastic elastomeric polypropylene
Polymer Bulletin (1997)
-
Ethylene polymerization with heterogeneous Ziegler-Natta catalysts
Polymer Bulletin (1995)