Phillips Petroleum Company

Other

Richard E Dietz

Melvin B Welch

Charles E Capshew

M Bruce Welch

Oscar D Nowlin

Joel L Martin

James N Short

Max P McDaniel

Charles M Selman

Raymond G Rohlfing

Benny E Nasser, Jr

Mason S Wilt

A catalyst, a process of forming the catalyst, and polymerizing at least one alpha-olefin with the catalyst, said catalyst produced by precipitating a composition from a solution of a metal halide, for example, magnesium dihalide, and a transition metal compound, for example, titanium tetraalkoxide, in the presence of a particulate diluent, for example, polymeric fibrils, with an agent selected from among specified organometallic compounds, metal halides and oxygen-containing metal halides, hydrogen halides and organic acid halides. The composition is preferably further treated with a halide ion exchanging source, for example, titanium tetrahalide to form a particularly active catalyst. The catalyst is preferably used in combination with a cocatalyst comprising a metal hydride of organometallic compound selected from an element of Periodic Groups IA, IIA and IIIA.

Polymerization of olefins

A catalyst, a process of forming the catalyst, and polymerizing at least one alpha-olefin with the catalyst, said catalyst produced by precipitating a composition from a solution of a metal halide, for example, magnesium dihalide, and a transition metal compound, for example, titanium tetraalkoxide, in the presence of a particulate diluent, for example, polymeric fibrils, with an agent selected from among specified organometallic compounds, metal halides and oxygen-containing metal halides, hydrogen halides and organic acid halides. The composition is preferably further treated with a halide ion exchanging source, for example, titanium tetrahalide to form a particularly active catalyst. The catalyst is preferably used in combination with a cocatalyst comprising a metal hydride or organometallic compound selected from an element of Periodic Groups IA, IIA and IIIA.

An additive comprising at least one parting agent is added to a particle form evaporator to reduce the buildup of polymer on the walls and rotor of the agitated bed of the particle form evaporator. In an alternate embodiment, the additive employed further comprises at least one filler.

Creation and maintenance of the bed of a particle form evaporator

Olefins such as ethylene can be polymerized in high productivities using a catalyst system wherein one catalyst component comprises a precipitated complex of zirconium tetrahydrocarbyloxide and/or titanium tetrahydrocarbyloxide and dihydrocarbylmagnesium. The productivity of the preferred catalyst containing both zirconium and titanium has been found to be substantially higher than the productivity of those catalysts obtained from either only Zr(OR').sub.4 or only Ti(OR').sub.4 and second catalyst component comprises at least one organometallic compound of a metal selected from the Groups I-III of the Mendeleev Periodic Table.

Zirconium-titanium catalyzed olefin polymerization

Catalysts effective for the polymerization of olefins at high productivity formed upon mixing (1) a solution of a titanium tetrahydrocarbyloxide or a zirconium tetrahydrocarbyloxide and an organoaluminum halide with (2) a dihydrocarbylmagnesium compound alone or admixed with a minor amount of a trialkylaluminum and (3) combining the product obtained in (2) with a metal halide selected from a silicon tetrahalide and a titanium tetrahalide. The catalyst component thus produced can be combined with an organoaluminum compound as a cocatalyst component.

Olefin polymerization

A high surface area catalyst component or support is produced by swelling a magnesium halide, e.g., MgCl.sub.2, with a secondary or tertiary alcohol, adding a hydrocarbon diluent, and removing some or substantially all of the free or unreacted alcohol. In one preferred embodiment, the alcoholate product is contacted with a halogenated tetravalent titanium compound, e.g., TiCl.sub.4, to form a first catalyst component (A) which can be combined with a cocatalyst component (B) comprising a metallic hydride or an organometallic compound, e.g., an organoaluminum compound to form a catalyst system active for olefin polymerization.

Catalyst and process

A transition metal compound and a metal halide compound are chemically combined to form a composition of matter. The composition of matter is mixed with a precipitating agent to form an active olefin polymerization catalyst. The catalyst can be further treated with a halide ion exchanging source to form an active olefin polymerization catalyst. Prepolymer is deposited on the catalyst(s) in an amount effective to reduce polymer fines when the catalyst(s) are used in polymerization processes.

Catalyst, method of producing the catalyst, and polymerization process

Catalysts effective for the polymerization of olefins at high productivity formed upon mixing (1) a solution of titanium tetrahydrocarbyloxide or a zirconium tetrahydrocarbyloxide and an organoaluminum halide with (2) a dihydrocarbylmagnesium compound alone or admixed with a minor amount of a trialkylaluminum and (3) combining the product obtained in (2) with a metal halide selected from a silicon tetrahalide and a titanium tetrahalide. The catalyst component thus produced can be combined with an organoaluminum compound as a cocatalyst component.

A transition metal compound and a metal halide compound are chemically combined to form a composition of matter. The composition of matter is rapidly mixed with a precipitating agent to form an active olefin polymerization catalyst.

A catalyst composition can be obtained by gently milling a milled mixture of magnesium chloride and a titanium tetrahalide with a magnesium alkoxide. The catalyst composition can be combined with a metallic hydride or, preferably, an organometallic co-catalyst, e.g., an organoaluminum compound, to form a catalyst useful for the polymerization of alpha-olefins.

A catalyst composition can be obtained by treating a magnesium halide-tetravalent, halogenated titanium compound mixture with a magnesium alkoxide. The catalyst composition can be combined with a metallic hydride or, preferably, an organometallic co-catalyst, e.g., an organoaluminum compound, to form a catalyst useful for the polymerization of alpha-olefins.

Alpha-olefins are polymerized employing a catalyst which forms on mixing a catalyst component A formed by milling together a magnesium halide or manganous halide with selected catalyst adjuvants comprising aryl carbonic acid esters followed by treatment of the resulting milled product with a halogenated tetravalent titanium compound and combining the product thus formed with a cocatalyst component B comprising at least one of an organoaluminum compound and an organoaluminum monohalide with or without an aromatic ester as a part of the cocatalyst system.

Polymerization catalyst and process

Active polymerization catalyst is deactivated using a high molecular weight epoxide.

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Bartlesville, OK, United States of America

Richard E Dietz