Montedison S.p.a.

Montell Technology Company Bv

Basell Technology Company B.v.

Ausimont S.p.a.

Montell North America Inc.

Himont Incorporated

Ausimont

Illaro Cuffiani

Umberto Zucchini

Gianni Pennini

Mario Sacchetti

Enrico Albizzati

Paolo Longi

Paolo Galli

Roberto Fabbri

Umberto Zucchini, Deceased

Viviano Banzi

Gian F Margelli

Arrigo Soverini

Enrico Pettenati

The present invention relates to spherical solid catalyst components for the polymerization of olefins, comprising a titanium compound, supported on a magnesium halide, containing more than one Ti-halogen link and optionally containing groups different from halogen in an amount lower than 0.5 mole per mole of Ti. Spherical solid compounds of the invention are characterized by having a surface area, measured by the BET method, of lower than 70 m /g, a total porosity, measured by the mercurium method, higher than 0.5 cm /g and a pore radius such that at least 50% have values higher than 800 &angst;.

Components and catalysts for the polymerization of olefins

The present invention relates to catalysts for the polymerization of ethylene and its mixtures with olefins CH,&boxH;CHR,, comprising the reaction product of a solid catalyst component containing Ti, Mg and halogen, an alkyl-Al compound and a particular electron donor compound selected from the compounds containing at least two oxygen atoms bonded to different carbon atoms and selected by standard tests of reactivity with triethyl-Al and MgCl,compounds. The catalyst of the invention are used in processes for the (co)polymerization of ethylene to prepare (co)polymers having narrow molecular weight distribution (MWD).

Catalysts for the (co)polymerization of ethylene

The present invention relates to spherical solid components of catalysts for the polymerization of olefins comprising, supported on a magnesium dihalide in active form, a titanium compound containing at least one Ti-halogen bond and one OR group, said OR group being bonded to Ti in an amount such that the OR/Ti molar ratio is greater than or equal to 0.5; optionally the component also comprises an electron donor compound. The spherical solid components of the invention are characterized by having a porosity comprised between 0.35 and 0.7 cm.sup.3 /g and by a pore size distribution such that at least 50% of the porosity is due to pores having an average radius greater than 800 .ANG..

The present invention relates to spherical solid components of catalysts for the polymerization of olefins comprising, supported on a magnesium dihalide in active form, a titanium compound containing at least one Ti-halogen bond, and optionally an electron donor compound. The spherical solid components of the invention are characterized by porosity values higher than 1 cm.sup.3 /g and a pore size distribution such that at least 30% of their pores have an average radius greater than 10000 .ANG..

Solid catalyst component for the polymerization of ethylene including the product of the reaction between: 1) the product obtained by reacting:

Components and catalysts for the polymerization of ethylene

Solid catalyst components for the preparation of catalysts capable of producing polymers and copolymers of ethylene with ultra high molecular weight are obtained in the form of particles having an average diameter of less than 10 micrometers, by way of reaction, in the presence of H.sub.2 O, between:

Catalytic components for copolymerizing ethylene with alpha-olefins, or alpha-olefins with one another, and possibly with a diene as a termonomer, suitable for producing saturated and unsaturated elastomeric copolymers are disclosed. The catalytic components are compounds obtained by the reaction of:

Catalysts for preparing saturated elastomeric olefinic copolymers and

Crystalline copolymers of ethylene and alpha-olefins CH.sub.2 .dbd.CHR in which R is an alkyl group having 2 to 8 carbon atoms, containing 0.5 to 3% by moles of polymerized alpha-olefin and having a density lower than 0.945 g/cc are obtained by polymerizing, in the gas phase, mixtures of ethylene and the alpha-olefins in contact with catalysts prepared from (1) Ti compounds supported on Mg halides and (2) organometallic compounds, which are active in the polymerization of ethylene but exhibit little, if any, activity in the homo- or copolymerization of the alpha-olefins.

Ethylene/butene-1 copolymers

Catalysts for the preparation of copolymers of ethylene and/or alpha-olefins and optionally dienes, are obtained by reacting an Al-alkyl with a solid catalytic component comprising:

Catalysts for the preparation of elastomeric olefinic copolymers

Disclosed are catalysts for the polymerization of ethylene and of mixtures thereof with olefins, comprising the product obtained by reacting the following components:

Catalysts for homo- and copolymerization of ethylene and the polymers

Components of catalysts for the polymerization of ethylene and of mixtures thereof with other olefins, in the form of emulsions or dispersions, in an inert liquid medium or in an inert gas phase of a liquid phase, comprising a compound of a metal of Groups IV to VI inclusive, of the Mendelyeev Periodic System, or a composition containing such a compound of the Mendelyeev Periodic System, which compound or composition is immiscible with aliphatic hydrocarbons, or which components are obtained from emulsions or dispersions, in an inert liquid medium or in gas phase, of a precursor of the catalyst component which, in the liquid state, is immiscible with the aliphatic hydrocarbons. An object of this invention is to provide new catalyst components for use in the polymerization of ethylene and of mixtures thereof with olefins and the catalysts obtained therefrom. More particularly, the invention provides new liquid catalytic components used in emulsion or dispersion in an inert liquid medium and the use of the catalysts deriving therefrom in the polymerization of ethylene and of mixtures thereof with alpha-olefins and/or with polyenes containing at least two double bonds.

Catalyst components for the polymerization of ethylene and of mixtures

New olefin polymerization catalysts are disclosed which are prepared by mixing

Process for preparing components of catalysts for the polymerization of

There are disclosed components of catalysts for polymerizing ethylene and mixtures of ethylene with alpha-olefins comprising the reaction product of (A) a magnesium compound, such as Mg-chloride, Mg-alcoholate or a Grignard compound, with (B) a titanium, vanadium or zirconium compound having at least two metal-oxygen bonds, such as a tetra-alcoholate, and with (C) a halogenated compound of metals of B, such as Ti tetrachloride. According to an aspect of the invention, the reaction product (A)+(B), before being reacted with (C), is treated with a silicum compound having a halogenating and/or reducing action. The catalysts according to the invention are suitable for obtaining ethylene polymers having a broad distribution of molecular weights.

Catalyst components for polymerizing olefins

There are disclosed new catalyst-forming components and catalysts prepared therefrom which, used in the polymerization of olefins, result in high yields of polyolefins having a narrow molecular weight distribution and which do not require special purifying after-treatments for the removal of catalyst residues. More particularly, the new catalyst components and catalysts prepared from them are useful in the polymerization of ethylene or alpha-olefins CH.sub.2 .dbd.CHR, in which R is an alkyl or aryl radical of from 1 to 8 carbon atoms, or mixtures of ethylene with said alpha-olefins.

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Ferrara, Italy

Illaro Cuffiani