Abstract: An olefin polymerisation process carried out in the presence of an anti-fouling agent and a chromium-type catalyst or Ziegler Natta catalyst; characterised in that the anti-fouling agent comprises an anti-fouling polymer having an average molecular weight (Mw) of greater than 1000 daltons and containing: (1) one or more blocks —(CH2—CH2—O)k— where each k is in the range from 1 to 50; and (2) one or more blocks —(CH2—CH(R)—(O)n? where R comprises an alkyl group having from 1 to 6 carbon atoms and each n is in the range from 1 to 50, and terminated by a R? and a R? end groups, wherein R? is OH or an alkoxy having from 1 to 6 carbon atoms and R? is H or an alkyl having from 1 to 6 carbon atoms.

Abstract: The present invention discloses articles having excellent dimensional stability, solid state mechanical properties and barrier properties that are produced with a polyethylene resin prepared with a catalyst system based on a bridged bisindenyl ligand.

Abstract: Provided is a process for producing a polyolefin having a multimodal molecular weight distribution, which process comprises: (a) polymerizing a first olefin monomer in the presence of an isomerizable metallocene catalyst, to form a first multi-modal polyolefin component; and (b) polymerizing a second olefin monomer in the presence of a second metallocene catalyst to form a second polyolefin component; wherein the molecular weight distribution of the first polyolefin component overlaps with the molecular weight distribution of the second polyolefin component.

Abstract: The invention relates to a process for producing polyethylene aseptic squeezable pouches. The invention also covers said pouches and their use for medical packaging applications.

Abstract: Provided is a method for the production of an olefin co-polymer, which method comprises co-polymerising two or more olefin monomers in the presence of a metallocene catalyst, wherein the metallocene catalyst comprises a metallocene having the following formula: R?(CpRm)(FluR?n)MQ2 wherein Cp comprises a cyclopentadienyl ring; Flu comprises a fluorenyl ring; R? comprises a structural bridge imparting stereorigidity to the component; each R is the same or different and is an organic group; m is an integer of from 1-4; each R? is the same or different and is an organic group; n is an integer of from 0-8; M is a metal atom from group IVB of the Periodic Table or is vanadium; and each Q is a hydrocarbon having from 1-20 carbon atoms or is a halogen.

Abstract: Device for injecting fluid in successive layers into a rotating fluidized bed and methods for catalytic polymerization, drying or other treatments of solid particles or for catalytic conversion of fluids, in which a succession of injectors (12), distributed around the fixed circular wall (2) of a circular reaction chamber, inject along this wall, in successive layers, one or more fluids (13), which entrain the solid particles (17), passing through this chamber, in a movement of rapid rotation whereof the centrifugal force concentrates these particles along this wall, thereby forming a fluidized bed rotating around a central duct (3), through which the fluids are removed.

Abstract: A process for hydrogenating unsaturations in petrochemical feedstocks, the process comprising contacting the petrochemical feedstock, including at least one component having unsaturations, and hydrogen with a catalyst comprising at least one Group Ia, Ib, IIb, VIb, VIIb or VIII metal on a support of an alkaline earth metal silicate having a surface area of at least 30 m2/g at a temperature of from 0 to 250° C. and a pressure of from 3 to 50 barg.

Abstract: The present invention discloses the use of a chromium-based catalyst system in two serially connected loop reactors for copolymerising ethylene and a comonomer, at reduced productivity, the final polyethylene having a reduced amount of gel.

Abstract: A process for cracking an olefin-containing hydrocarbon feedstock which is selective towards light olefins in the effluent, the process comprising passing a hydrocarbon feedstock containing one or more olefins through a moving bed reactor containing a crystalline silicate catalyst selected from an MFI-type crystalline silicate having a silicon/aluminium atomic ratio of at least 180 and an MEL-type crystalline silicate having a silicon/aluminium atomic ration of from 150 to 800 which has been subjected to a steaming step, at an inlet temperature of from 500 to 600° C., at an olefin partial pressure of from 0.

Abstract: The present invention discloses the use of two different new single site catalyst components based on different metals for preparing polymers having a broad or multimodal molecular weight distribution in a single reactor.

Abstract: The present invention discloses a catalyst system that comprises several bridged bis- or bis-tetrahydro-indenyl components having different substitution patterns in order to prepare polymers having a broad molecular weight distribution.

Abstract: Process for the hydrotreatment of a mixture of C4 to C8 hydrocarbon-based compounds, rich in olefins and monoaromatic compounds, by hydrogenation in the presence of a solid catalyst, characterized in that an ammonia precursor is introduced into the charge of hydrocarbon-based compounds and in that the catalyst comprises at least one transition metal supported on at least one refractory oxide.

Abstract: Provided is a catalyst system for producing a polyolefin blend, which catalyst system comprises a mixture including the following catalyst components: i) a catalyst component A capable of producing an isotactic olefin polymer, and/or a catalyst component A? capable of producing a polymer comprising an isotactic polyolefin block; and ii) a catalyst component B capable of producing a syndiotactic polyolefin, and/or a catalyst component B? capable of producing a polymer comprising a syndiotactic polyolefin block; wherein each of the components in the catalyst system is distinct from the other components in the catalyst system.

Abstract: A process for cracking an olefin containing hydrocarbon feedstock which is selective towards light olefins in the effluent, the process comprising passing a hydrocarbon feedstock containing one or more olefins through a moving bed reactor containing a crystalline silicate catalyst selected from an MFI-type crystalline silicate having a silicon/aluminium atomic ratio of at least 180 and an MEL-type crystalline silicate having a silicon/aluminium atomic ration of from 150 to 800 which has been subjected to a steaming step, at an inlet temperature of from 500 to 600° C., at an olefin partial pressure of from 0.

Abstract: The present invention discloses a catalyst system based on a metallocene catalyst component and a new single site catalyst component for the production in a single reactor of improved polyolefins having a bimodal molecular weight distribution.

Abstract: The present invention discloses the use in rotomolding or slush molding applications of a composition comprising a polyolefin, a processing aid and optionally a UV-stabilizer.

Abstract: The present invention discloses a method for controlling the onset and development of swelling in a slurry loop reactor by progressively diluting the reactor, the amount of dilution being driven by the amplitude of the fluctuations measured on some plant measurement.

Abstract: The present invention discloses a metallocene catalyst component of the formula (I) [(Flu-R?-Cp)2M]?[Li(ether)4]+, wherein Cp is a cyclopentadienyl, substituted or unsubstituted, Flu is a fluorenyl, substituted or unsubstitutted, M is a metal Group III of the Periodic Table, and R? is a structural bridge between Cp and Flu imparting stereorigidity to the component. It further discloses a process for preparing said metallocene catalyst component and its use in controlled polymerisation.

Abstract: The present invention discloses a method for preparing hollow beads of polyethylene of controlled morphology and size.

Abstract: A process for hydrogenating unsaturations in petrochemical feedstocks, the process comprising contacting the petrochemical feedstock, including at least one component having unsaturations, and hydrogen with a catalyst comprising at least one Group Ia, Ib, IIb, VIb, VIIb or VIII metal on a support of a crystalline calcium silicate having a surface area of at least 30 m2/g, the support being in the form of substantially spherical particles having a mean diameter of from 10 to 200 microns and pores in the particles having a diameter of from 100 to 2000 Angstroms, at a temperature of from 0 to 550° C. and a pressure of from 3 to 150 barg.