Patent
A large-pore polyolefin, a method for its production and a procatalyst containing a transesterification product of a lower alcohol and a phthalic acid ester
TLDR
In this paper, a method for the preparation of polyolefins by polymerizing olefin by using a procatalyst composi-tion prepared by bringing together magnesium chloride, a lower alcohol, a titanium compound, and phthalic acid ester.Abstract:
The invention relates to a method for the preparation of polyolefins by polymerizing olefin by using a procatalyst composi-tion prepared by bringing together magnesium chloride, a lower alcohol, a titanium compound, and phthalic acid ester. The in-vention also relates to the said procatalyst composition. The invention has succeeded in lowering the concentrations of titanium and phthalic acid ester in the catalyst, and thereby also in the polyolefin, and at the same time in preparing large-pore polyolefin, which is important for certain purposes. These properties have been obtained by using a procatalyst of the said type, in the pre-paration of which a transesterification has been performed between the lower alcohol and the phthalic acid ester, and the phthalic acid ester selected for the transesterification is one the alkoxy group of which has at minimum 10 carbon atoms.read more
Citations
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Patent
Process for preparing polypropylene alloys
TL;DR: In this paper, a process and an apparatus for polymerizing propylene is described, which consists of carrying out the polymerization in at least one slurry and at least 1 gas phase reactor without recycling unreacted monomers to the slurry reactor.
Patent
Magnesium dichloride-alcohol adducts, process for their preparation and catalyst components obtained therefrom
TL;DR: In this article, an X-ray diffraction spectrum in which, in the range of 2υ diffraction angles between 5° and 15°, the three main diffraction lines are present at diffraction angle 2 υ of 8.8 ± 0.2.
Patent
Magnesium dichloride-alcohol adducts and catalyst components obtained therefrom
Giampiero Morini,Giulio Balbontin,Fabrizio Piemontesi,Maria Fusto,Gianni Vitale,Giansiro Prini +5 more
TL;DR: In this paper, an adduct comprising MgC12, an alcohol (ROH) in which R is a C 1-C 10 hydrocarbon group, and a compound containing a transition metal M selected from the Groups 3 to 11 or the lanthanide or actinide groups of the Periodic Table of the Elements (new IUPAC version) in an amount such as to give a weight of M atoms lower than 10% based on the total weight of the adduct.
Patent
Solid catalyst component and catalyst for polymerization of olefins
TL;DR: A solid catalyst component for polymerization of olefins prepared by reacting a titanium halide, a diester of aromatic dicarboxylic acid and a dialkoxymagnesium having a bulk density of at least 0.25 g/ml and an average particle size of 1 to 100 μm is presented in this article.
Patent
Soluble magnesium dihalide complex, preparation and use
TL;DR: In this article, a complex of the magnesium dihalide and the electron donor is described, which is called MgX2 and has the formula (I): Mg X2 [R(OR')n]m where R is an n-valent C1-C20 aliphatic group.
References
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Patent
Catalysts for the polymerization of olefins
TL;DR: In this paper, the new catalysts are obtained by mixing a hydride or organometallic compound of a metal belonging to Groups I to III of the Mendelyeev Periodic System with the product obtained by contacting a titanium tetrahalide with a support comprising an anhydrous magnesium or zinc halide in an active form, under particular conditions.
Patent
Procedure for manufacturing catalyst components for polymerizing olefines
Iiskola Eero,Jukka Koskinen +1 more
TL;DR: A procedure for manufacturing solid catalyst components for catalysts serving polymerization of alpha-olefines, of the kind which comprises a solid carrier substance containing an organic or inorganic magnesium compound and treated with a titanium halide and optionally with an electron donor compound is described in this article.
Patent
A method for the modification of catalysts intended for the polymerization of olefins
TL;DR: In this paper, a spray-crystallized Mg-halide and alcohol is used as the catalyst carrier, because the alkoxy group of the alcohol of the carrier and the alkoxide group of an ester of the donor can be transesterified and thus obtain the preferable effects of both esters on the run of the polymerization reaction.
Patent
Process for polymerizing or copolymerizing olefins
Norio Kashiwa,Yoshihisa Ushida +1 more
TL;DR: A process for polymerizing or copolymerizing olefins in the presence of a catalyst composed of a solid titanium catalyst component obtained by reacting (i) a titanium composition composed essentially of tetravalent titanium, magnesium, halogen and an electron donor or electron donor residue selected from the group consisting of organic acid esters, alkoxy groups, and aryloxy groups as mentioned in this paper.
Patent
Preparation of homopolymers and copolymers of propylene by means of a Ziegler-Natta catalyst system
Guenther Dr Schweier,James F R Dipl Chem Dr Jaggard,Rainer Alexander Dr. Werner,Wolfgang Dr Gruber +3 more
TL;DR: In this paper, the Ziegler-Natta catalyst system was used for polypropylene polyethylene (polypropylene) polypropylene (POP) synthesis.