Saudi Basic Industries Corporation

Linde Aktiengesellschaft

Saudi Bosic Industries Corporation

Atieh Abu-Raqabah

Akhlaq A Moman

Orass M Hamed

Vugar O Aliyev

Khalid Abdullah Al-Bahily

John Ledford

Raju Raghavan

Navin Nallaveerapan

Helmut G Alt

Wei Xu

Syriac J Palackal

Heinz Bölt

Fuad Mosa

Peter M Fritz

Muhammad Atiqullah

Faizur Rahman

Syriac Palackal

Muhammad A Al-Saleh

Mohammad Akhtar Zahoor

Mohammed Zahoor

Sirajudeen Mohamed

Holger Hackner

Muhammad Naseem Akhtar

Abdul Wahab Al-S&aacute;doun

Bilal V Guliyev

Reyhan V Aliyeva

Chingiz K Rasulov

Minavar J Ibrahimova

Marcus Seitz

Sameh Rizkallah

Akber A Khanmetov

Fahad Al-Khodairi

Muhammad Ibrahim

Javaid H Khan

Akif H Azizov

Abdulaziz Al-Nezari

The present invention relates to a process for the preparation of linear low molecular weight alpha-olefins having 4 to 24 carbon atoms, comprising oligomerizing ethylene in an inert solvent in the presence of a catalyst system comprising: (i) zirconium carboxylate of the formula (RCOO)ZrCl, wherein Ris saturated or unsaturated aliphatic C-Chydrocarbon or aromatic C-Chydrocarbon and m fulfills 1&#x2266;m&#x2266;4, (ii) at least one aluminum compound selected from organoaluminum compounds of the formula RAlX, wherein Ris C-Calkyl, X is chlorine, bromine or iodine, and n fulfills 1&#x2266;n&#x2266;2, and/or aluminoxanes, and (iii) at least two different additives selected from the group consisting of hydrogen, esters, ketones, ethers, amines, anhydrides, phosphines and sulfur compounds; as well as to a catalyst used therein.

Process for the preparation of linear alpha-olefins and catalyst used therein

The present invention relates to a catalyst composition for the oligomerization of ethylene comprising at least one transition metal bisphenolate compound and at least one cocatalyst. The transition metal bisphenolate is a zirconium bisphenolate. The invention also relates to a process for the oligomerization of ethylene in the presence of the catalyst composition according to the invention. The process results in a high yield of C-Clinear alpha-olefin and C-Clinear alpha-olefin.

Catalyst composition and a process for the oligomerization of ethylene

The present invention relates to a catalyst precursor for the production of odd olefins having the formula: wherein X and Y are halogen and n is 2 or 3; and to a process for its preparation and a method for oligomerization of ethylene.

Catalyst precursor for the production of olefins with an odd number of carbons atoms, process for its preparation and production method for such olefins

The present invention relates to a process for the polymerization of olefins, comprising the steps of introducing at least one olefin, at least one polymerization catalyst, at least one cocatalyst and at least one cocatalyst aid, and optionally a scavenger, into a polymerization reactor, and polymerizing the olefin, wherein the cocatalyst aid is a reaction product prepared separately prior to the introduction into the reactor by reacting at least one metal alkyl compound of group IIA or IIIA of the periodic system of elements and at least one compound (A) of the formula RXR', wherein R is a branched, straight, or cyclic, substituted or unsubstituted, hydrocarbon group having 1 to 30 carbon atoms, R&#x2032; is hydrogen or any functional group with at least one active hydrogen, X is at least one heteroatom selected from the group of O, N, P or S or a combination thereof, and wherein n and m are each at least 1 and are such that the formula has no net charge.

Process for the polymerizaion of olefins

A catalyst composition for polymerizing olefins to polymers having bimodal molecular weight distribution comprises two transition metal-containing metallocene compounds, a magnesium compound, an alcohol, an aluminum containing co-catalyst and a polymeric support. The transition metal in one of the metallocene compounds is zirconium and the transition metal in the second metallocene compound is selected from the group consisting of titanium, vanadium and hafnium. Polyolefin polymers made using the catalyst composition have broad molecular weight distributions and are useful in film and blow molding applications.

Polymer supported metallocene catalyst composition for polymerizing olefins

The invention relates to a homogeneous catalyst for the production of linear alpha-olefins by oligomerisation of ethylene, consisting of a zirconium salt of organic acids and a cocatalyst which consists of alkylaluminiums and/or aluminium chloride. The activity of the catalyst, system may sometimes be raised substantially by adjusting the molar ratio of chlorine to aluminium in the cocatalyst within the range between 1.0 and 1.5. The economic viability of the production process and product purity are improved.

Cocatalyst for the production of linear alpha-olefins

A catalyst composition includes: A) a solid catalyst precursor containing a metallocene compound, a magnesium compound and a particulate polymeric material; and B) a cocatalyst containing aluminum compound. The catalyst is prepared by combining metallocene compound, magnesium compound and particles of polymeric material to form a catalyst precursor; and activating the catalyst precursor with alkylaluminums and/or aluminoxanes. Homopolymeric or copolymeric polyolefins are produced by contacting olefins or olefins and alpha-olefins with the catalyst composition.

Catalyst composition and process for olefin polymerization and copolymerization using supported metallocene catalyst systems

The present invention relates to a process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins by contacting ethylene or ethylene and alpha-olefin with a catalyst composition comprising: (a) a solid catalyst precursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising an aluminum compound.

Process for the polymerization of olefins

The present invention relates to a catalyst composition for polymerization of olefins comprising: (a) a solid catalyst pre cursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising at least one aluminum compound; and to a method for preparing a catalyst composition according to the present invention, comprising the steps of: (a) combining the components of the solid catalyst precursor; and (b) activating the catalyst precursor with aluminum compound.

Catalyst composition for polymerization of olefins and method for preparing the same

The present invention relates to a supported catalyst system for olefin polymerization which comprises at least one metallocene component and a support of an inorganic oxide of silica, aluminum or a polymer containing hydroxyl groups. The support is modified with an organogermane and/or organotin compound. The inventive catalyst system produces minimal reactor fouling, has excellent productivity and good hydrogen responsiveness. The present invention also relates to a process for preparing the catalyst system and to the slurry/suspension or gas-phase polymerization of olefins using the catalytic system, optionally with a small amount of aluminoxane cocatalyst.

Supported metallocene catalyst system for olefin polymerization, method for making and using the same

The present invention relates to a catalyst precursor for homo- or copolymerization of olefins comprising a metallocene compound, a magnesium containing compound and a thermoplastic polymer support, and optionally further comprising a metal alkoxy compound, an aluminum containing compound, a silicon containing compound and/or an alcohol. The invention further relates to the process of polymerizing olefins using the inventive catalyst precursor.

Catalyst precursor for the polymerization of olefins and polymerization process using the same

Catalyst compositions for polymerizing olefins to multimodal molecular weight distribution polymer, processes for production and use of the catalyst

A catalyst composition has a catalyst component which includes a metallocene transition metal compound, a magnesium compound, a hydroxyl containing compound, and a polymeric material. The catalyst component may also include asilicon compound and an aluminum compound. The catalyst component is combined with a cocatalyst and used in olefin polymerization.

Supported metallocene catalyst system for olefin polymerization

The invention relates to an improved olefin catalyst, a method of in situ-activated catalyst preparation and a process for the polymerization of olefinic monomers via, for example, a titanium trichloride/magnesium dichloride/tetrahydrofuran reaction product catalyst precursor. The activated catalyst is prepared in situ in a polymerization reactor using an alumoxane based co-catalyst wherein the cumbersome traditional steps of catalyst activation and isolation, prior to polymerization are eliminated. An unexpected advantage of this invention is a significant increase in catalyst productivity while maintaining a relatively constant value of the bulk density of polymeric materials produced while concomitantly producing a polymeric product having a broad molecular weight distribution compared with typical alumoxane-activated metallocene catalysts.

Alumoxane-enhanced, supported Ziegler-Natta catalysts, methods of making same, processes of using same and polymers produced therefrom

A catalytic polymerization process for preparing polymer products is provided. The polymerization process is either homopolymerization of olefins or copolymerization of olefins with alpha-olefins. The polymerization process is conducted in the presence of a solid catalyst precursor and a cocatalyst. The catalyst precursor includes a transition metal, a magnesium compound, an aluminum compound and a polyvinylchloride (PVC) support.

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Riyadh, Saudi Arabia

Atieh Abu-Raqabah