Saudi Basic Industries Corporation

Sabic Basic Industries Corporation

Mansour Izzat Taftaf

Gennadii Dimitrievich Bukatov

Vladimir Aleksandrovich Zakharov

Sergei Andreevich Sergeev

Abderrahman Meddad

Hesham A Al-Shobilly

Serajudin F Ahmed

Syriac J Palackal

Martin Alexander Zuideveld

Nicolaas Hendrika Friederichs

Jaiprakash Brijlal Sainani

Akhlaq A Moman

Aurora Alexandra Batinas-Geurts

Orass M Hamed

Atieh Aburaqabah

Vimalkumar Mahendrabhai Patel

John Ledford

Navin Nallaveerapan

Nourdin Ghalit

Mark Vlaar

Yves Johann Elizabeth Ramjoie

Atieh Abu Raqabah

Mahendrabhai Patel Vimalkumar

Hesham Al-Shobilly

Syricac Palackal

D Nallaveerapan

The invention relates to a process for the preparation of polypropylene having: a molecular weight of 450,000-950,000, a molecular weight distribution of 3-6, and xylene soluble content of 2-6 wt %, by converting propylene into the polypropylene without pre-polymerization in the presence of a polymerization catalyst under a condition where the volume ratio of Hto propylene is at most 0.0020, wherein the catalyst comprises a catalyst component and a co-catalyst, wherein the catalyst component is obtained by a process wherein a compound with formula Mg(OAlk)Clwherein x is larger than 0 and smaller than 2, y equals 2&#x2212;x and each Alk, independently, represents an alkyl group, is contacted with a titanium tetraalkoxide and/or an alcohol in the presence of an inert dispersant to give an intermediate reaction product and wherein the intermediate reaction product is contacted with titanium tetrachloride in the presence of an internal donor.

Polypropylene and articles thereof

Process for the polymerization of propylene

The present invention relates to a catalyst composition comprising the compound represented by the Fischer projection of formula (I) as an internal electron donor, (I) wherein: R, R, R, R, Rand Rare the same or different and are independently selected from a group consisting of hydrogen, straight, branched and cyclic alkyl and aromatic substituted and unsubstituted hydrocarbyl having 1 to 20 carbon atoms; Ris selected from a group consisting of straight, branched and cyclic alkyl and aromatic substituted and unsubstituted hydrocarbyl having 1 to 20 carbon atoms; and Ris selected from a group consisting of aromatic substituted and unsubstituted hydrocarbyl having 6 to 20 carbon atoms; N is nitrogen atom; O is oxygen atom; and C is carbon atom. The present invention also relates to a process for preparing said polymerization catalyst composition and to a polymerization catalyst system comprising said catalyst composition, a cocatalyst and optionally an external electron donor. Furthermore, the present invention relates to a polyolefin obtainable by the process according to the present invention and to the use of the compound of formula (I) as in internal electron donor in catalysts for polymerization of olefins. 

Catalyst composition for polymerization of olefins

The invention relates to a process for preparing a polymerization catalyst component wherein a solid compound with formula Mg(OR)Clwherein x is larger than 0 and smaller than 2, and each R, independently, represents an alkyl group, said compound being obtained by reacting a Grignard compound with an alkoxy- or aryloxy-containing silane compound, is contacted with at least one activating compound selected from the group formed by internal electron donors and compounds of formula M(OR)(R), wherein M can be Ti, Zr, Hf, Al or Si, each Rand R, independently, represent an alkyl, alkenyl or aryl group, v is the valency of M and w is smaller than v, in the presence of an inert dispersant to give an intermediate reaction product, and wherein the intermediate reaction product is contacted with a halogen-containing Ti-compound. A catalyst system comprising said component shows improved performance in olefin polymerization. The invention also relates to a polymerization catalyst system comprising the catalyst component and to a process of making a polyolefin by contacting at least one olefin with a polymerization catalyst system comprising the catalyst component.

Process for preparing a catalyst component for propylene polymerization

Supported catalyst composition for polymerization of olefins comprising: (i) a titanium compound, a magnesium compound and at least one electron donor compound; (ii) an oxygen containing polymer support; and (iii) a cocatalyst comprising at least one aluminum compound.

Supported catalyst composition for polymerization of olefins, method for preparing the same and process for polymerization using the same

Supported catalyst composition for polymerization of olefins comprising: (i) a titanium compound, a magnesium compound and at least one electron donor compound; (ii) a chlorine containing polymer support; and (iii) a cocatalyst comprising at least one aluminum compound, wherein the magnesium loading on the final catalyst is between about 0.20 and 6% by weight.

Process for preparing a catalyst composition for ethylene polymerization or copolymerization, with the steps of: (a) treating at least one magnesium alkoxide compound with the effluent waste from a process for production of a polypropylene catalyst of the Ziegler-Natta type, the effluent waste being mainly composed of about 10 to about 20 wt.-% transition metal based compounds, about 20 to about 50 wt.-% solvents, about 0 to about 2 wt.-% electron donors and impurities; (b) washing the product of step (a) with an inert hydrocarbon solvent; and (c) drying the material for use as the catalyst composition.

Process for preparation of catalyst composition for ethylene polymerization

The present invention relates to a catalyst composition for homopolymerization or copolymerization of olefins comprising: (a) a solid catalyst precursor comprising a transition metal compound of group IVB, VB, or VIB of the periodic table, a magnesium compound and aliphatic polyketone particles; and (b) a cocatalyst comprising an aluminum alkyl, an aluminoxane or mixtures thereof; and a process for homopolymerisation or copolymerisation of olefins.

Catalyst composition for polymerization of olefins and process using the composition

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Riyadh, Saudi Arabia

Mansour Izzat Taftaf