How can pH value during catalyst preparation affect the performance of vanadium-modified (SiO2/MgO/ MgCl2)•TiClx Ziegler-Natta polyethylene catalysts [PDF]
Polyolefins Journal, 2018 Vanadium-modified (SiO2/MgO/MgCl2)•TiClx Ziegler-Natta catalysts were prepared through co-impregnation of water-soluble magnesium and vanadium salts under different pH values.
Ting Fu +5 more
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Advantages of an Emulsion‐Produced Ziegler‐Natta Catalyst Over a Conventional Ziegler‐Natta Catalyst
Macromolecular Materials and Engineering, 2005 AbstractSummary: Self‐supported and MgCl2‐supported Ziegler‐Natta catalysts, produced by two catalyst synthesis methods are compared. Borealis Polymers OY (Finland), who supplied the catalysts, developed the catalyst synthesis methods. The first method (Method One) is based on an emulsion system and consists of an in situ single step preparation.
Mohammed Abboud +2 more
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Coadsorption Model for First-Principle Description of Roles of Donors in Heterogeneous Ziegler-Natta Propylene Polymerization [PDF]
, 2012 Systematic periodic density functional calculations were conducted to clarify the mechanism for donors to exert steric and electronics influences on propylene polymerization using heterogeneous Ziegler–Natta catalysts.
Taniike, Toshiaki, Terano, Minoru
core +1 more source
The coordinative state of aluminium alkyls in Ziegler–Natta catalysts [PDF]
Physical Chemistry Chemical Physics, 2018 Multinuclear solid-state NMR provides insight in the interactions of aluminium alkyl based cocatalysts in MgCl2-supported Ziegler–Natta catalysts.
E. S. (Merijn) Blaakmeer +2 more
openaire +2 more sources
, 2023 Since its emergence over 50 years ago, the structure of surface sites in Ziegler-Natta catalysts, which are responsible for a major fraction of the world’s supply of polyethylene (PE) and polypropylene (PP), has remained elusive.
Sebastian, Sabisch +4 more
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Study of Ziegler-Natta/(2-PhInd)2ZrCl2 hybrid catalysts performance in slurry propylene polymerization [PDF]
Polyolefins Journal, 2015 Several types of hybrid catalysts are made through mixing of 4th generation Ziegler-Natta (ZN) and (2-PhInd)2ZrCl2 metallocene catalysts using triethylaluminum (TEA) as coupling agent.
Gholam-Reza Nejabat +7 more
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Ti+4 determination in Ziegler–Natta polymerization catalysts via UV‒vis spectroscopy method [PDF]
Polyolefins JournalThe determination of Ti+4 in Ziegler–Natta catalysts is highly relevant for industrial plants that use Ziegler–Natta (ZN) catalysts based on TiCl4 as a source of titanium.
Jonas Biagini, Joao Henrique dos Santos
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Effects of Ti/Mg molar ratio on bi-supported SiO2/MgCl2 (ethoxide type)/TiCl4 catalysts in ethylene homopolymerization and ethylene/1-hexene copolymerization [PDF]
Polyolefins Journal, 2018 SiO2/MgCl2 (ethoxide type)/TiCl4 Ziegler-Natta catalysts for use in ethylene polymerization and ethylene/1-hexene copolymerization have been prepared using silica with a supported layer of magnesium ethoxide (Mg(OEt)2) as a catalyst precursor, followed ...
Liang Zhu +5 more
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Angewandte Chemie, Volume 138, Issue 15, 6 April 2026.Titanium silicalite‐1 (TS‐1), used in industrial selective oxidation processes, depends on specific, yet still unresolved Ti sites, dispersed within the framework of an MFI‐zeolite. Applying high field (28.2 T) 47/49Ti NMR and 17O NMR spectroscopy for an array of TS‐1 catalysts enables the development of an NMR crystallography protocol and the ...
Christoph J. Kaul +14 more
wiley +2 more sources
DIENES POLYMERISATION WITH METATHESIS AND ZIEGLER-NATTA HOMOGENEOUS CATALYSTS
, 1991 IN THIS THESIS THE POLYMERISATION OF DIENES WITH ZIEGLER-NATTA AND METATHESIS CATALYSTS IS DESCRIBED AND THE RELATION BETWEEN THE TWO TYPES OF POLYMERISATION IS EXAMINED.
Μπόκαρης, Ευθύμιος
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