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The effect of triethylaluminium treatment on a ziegler-natta catalyst supported on magnesium chloride prepared by a recrystallization method, for propylene polymerization

✍ Scribed by Hong Man Park; Wha Young Lee

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
657 KB
Volume
28
Category
Article
ISSN
0014-3057

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✦ Synopsis

MgC12 as a support for the polymerization catalyst of propylene was prepared by dissolving it in ethanol and by recrystallizing it in n-decane media with vacuum drying. This support was modified by adding ethylbenzoate as an electron-donor, by treating it with triethylaluminium (TEA), and/or by impregnating TiC14. Those catalysts were characterized by means of XRD, N 2 BET method, and SEM. It was found that treatment of supports with TEA aluminium is essential for the improvement of catalytic activity and stereoregularity of polypropylene. Catalyst HETC (TIC14 impregnated on MgCI2/EB/TEA) showed the highest activity and isotactic index for polypropylene.

πŸ“œ SIMILAR VOLUMES

Polymerization of ethylene and ethylene/
Polymerization of ethylene and ethylene/1-hexene over Ziegler–Natta/metallocene hybrid catalysts supported on MgCl2 prepared by a recrystallization method
✍ Han Seock Cho; Jin Suk Chung; Jae Hyuck Han; Young Gwan Ko; Wha Young Lee πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 216 KB πŸ‘ 2 views

MgCl 2 for use as a catalyst support was prepared by dissolution in methanol and recrystallization in n-decane, followed by vacuum-drying at 2,000 rpm. The prepared support was modified by treatment with alkylaluminum compounds. The activity profile of ethylene over the supported catalysts persisted

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Ziegler-Natta catalysts for ethylene and propylene polymerizations supported on the products of thermal desolvation of the adducts of magnesium chloride with methyl and ethyl alcohols
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MgCl 2 adducts with alcohols and ethers can be converted to more active supports through the elimination of the alcohol molecules from the adducts by thermal desolvation. Catalysts supported on the products of thermal desolvation of the MgCI: adducts with methyl and ethyl alcohols have been prepared

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## Abstract Experiments designed to prepare Ziegler‐Natta catalysts with controlled particle morphology are reported. Different dealcoholation processes are used on the adduct MgCl~2~ · __n__EtOH to prepare the catalysts: either thermal treatment or chemical dealcoholation employing different subst

The effect of alcohol treatment in the p
The effect of alcohol treatment in the preparation of MgCl2 support by a recrystallization method on the catalytic activity and isotactic index for propylene polymerization
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An MgCI, catalyst support for propylene polymerization was prepared by dissolving MgCI, in ethanol and/or I-propanol and recrystallizing it in an n-decane medium with vacuum drying. This support was modified by adding di-n-butyl phthalate as an internal electron donor, and subsequently TiCl, was imp