Abstract: A method for ethylene slurry polymerisations in a loop reactor in the presence of ethylene monomer, diluent and catalyst and optionally co-monomer and hydrogen, wherein the polymerisation temperature is maintained below the swelling temperature, characterised in that the swelling temperature is calculated as a function of co-monomer concentration and the number average molecular weight of the polyethylene end-product.

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 relates to a method for preparing and extruding a bimodal polyethylene product, which comprises a first polyethylene fraction and a second polyethylene fraction having a different molecular weight than the first polyethylene fraction. More specifically, the present invention relates to a method for controlling the specific energy applied on said bimodal polyethylene product by regulating the amount of the polyethylene fraction having the higher molecular weight in said bimodal polyethylene product. According to the present invention regulation of the amount of said polyethylene fraction having the higher molecular weight in said bimodal polyethylene product is obtained by regulating the polymerization conditions for preparing the bimodal polyethylene product, and in particular by adjusting ethylene monomer feed during the polymerization process.

Abstract: Process for the purification of an alcohol in the course of a process comprising: (1) providing a reaction zone (C) comprising an acid type catalyst; (2) providing a reaction zone (B) comprising an acid adsorbent material; (3) providing an alcohol stream comprising impurities; (4) introducing the alcohol stream of (3) into the reaction zone (B) and bringing said stream into contact with the acid adsorbent material at conditions effective to reduce the amount of impurities having an adverse effect on the acid type catalyst of the reaction zone (C); (5) recovering from step (4) an alcohol stream and introducing it into the reaction zone (C); (6) optionally introducing one or more reactants (R) into the reaction zone (C); (7) operating said reaction zone (C) at conditions effective to recover a valuable effluent.

Abstract: This invention relates to fluorinated alkoxy-imino metallic complexes and their use in catalyst systems for the polymerisation or oligomerisation of ethylene and alpha-olefins.

Abstract: This invention relates to the synthesis of substituted tetrahydroindenyls and the use of the synthesised complexes in the homo- and co-polymerisation of ethylene and alpha-olefins.

Abstract: The present invention discloses a method for preparing long-chain-branched isotactic polypropylene by first oligomerising propylene with a suitable oligomerisation catalyst system and then copolymerising propylene and the oligomer obtained in situ with a mono-aryl-substituted methylene bridged catalyst system.

Abstract: A multilayer film comprising a first layer comprising a poly(hydroxy carboxylic acid) and a second layer adjacent to the first layer comprising more than 50% by weight of polyethylene prepared with a single-site catalyst, preferably a metallocene catalyst.

Abstract: An apparatus defined as a set of loop reactors suitable for the polymerization process of a monomer, preferably ethylene and optionally an olefin co-monomer, comprising for each of said reactors: a plurality of interconnected pipes P defining a flow path for a polymer slurry, said slurry consisting essentially of ethylene, optionally a co-monomer, a polymerization catalyst, liquid diluent and solid olefin polymer particles, means for feeding monomer, optionally a co-monomer, diluent and optionally hydrogen in the reactor, means for feeding a polymerization catalyst in the reactor, a pump suitable for maintaining the polymer slurry in circulation in such reactor, one or more settling legs connected to the pipes P of such reactor for settling of polymer slurry, one or more control valves connected to the outlet of such settling legs, and one or more flash lines for discharging settled polymer slurry out of the reactor characterized in that each of said loop reactors comprises a three-or-more-way valve defining

Abstract: A method for predicting the drop impact resistance of a stretch-blow molded polypropylene container which comprises the steps of measuring the initial size of the container, placing it in an oven, remeasuring its size after removing it from the oven, calculating the percentage difference in size of the container and determining its drop impact resistance, which is proportional to said difference.

Abstract: This invention discloses a method for preparing a preform for two-stage injection-stretch-blow-moulding (ISBM) from polypropylene resin produced with a Ziegler-Natta catalyst system and having a melt flow index MI2 of from 1 to 20 dg/min, wherein polypropylene is injected at a melt temperature of at least 265° C. Also disclosed are the preforms obtainable by the method, the use of the preforms for preparing bottles, and the bottles prepared from the preforms.

Abstract: A process (or steam cracking a hydrocarbon feedstock containing olefins to provide increased light olefins in the steam cracked effluent, the process comprising passing a first hydrocarbon feedstock containing one or more olefins through a reactor containing a crystalline silicate to produce an intermediate effluent with an olefin content of lower molecular weight than that of the feedstock, fractionating the intermediate effluent to provide a lower carbon fraction and a higher carbon fraction, and passing the higher carbon fraction, as a second hydrocarbon feedstock, through a stream cracker to produce a steam cracked effluent.

Abstract: A process for obtaining a metalloaluminophosphate (MeAPO) molecular sieve comprising the following steps in the order given: a). providing an aqueous solution containing sources of at least 2 of the following: Metals (Me), Al and P; b). co-precipitating an amorphous precursor of the molecular sieve from the solution by changing the solution's pH, followed by separating the amorphous precursor from the water, optionally including formulation; c). optionally washing and drying at a temperature below 450° C. of the amorphous precursor; d). contacting the amorphous precursor with a template-containing aqueous solution and with a source of Al, P or Me, which is not already present in step (a) and optionally additional sources of Al and/or P and/or Me; and e). partially crystallising the molecular sieve under autogeneous conditions so that 5 to 90% by weight of the amorphous precursor crystallises.

Abstract: The present invention relates to a process to make alpha olefins comprising: dehydrating ethanol to recover an ethylene stream, introducing said ethylene stream into an oligomerization zone containing an oligomerization catalyst and into contact with said oligomerization catalyst, operating said oligomerization zone at conditions effective to produce an effluent consisting essentially of 1-butene, 1-hexene, optionally heavier alpha olefins and unconverted ethylene if any, introducing the above effluent into a fractionation zone to recover a stream consisting essentially of 1-butene, a stream consisting essentially of 1-hexene, optionally a stream consisting essentially of heavier alpha olefins and an optional ethylene stream. In an advantageous embodiment the 1-hexene or at least one heavier alpha olefins, if any, are isomerized to an internal olefin and subsequently transformed by metathesis with the aid of additional ethylene into different alpha-olefins with even or odd number of carbons.

Abstract: This invention is related to the preparation of polyethylene pipe resins suitable for transporting water containing chlorine.

Abstract: A multi-component article with controllable degradation and/or disintegration, comprising: a first part (A) which comprises at least one polyolefin combined with at least one prodegradation/prodisintegration agent; and; a second part (B) which comprises at least one polyolefin combined with at least one prodegradation/prodisintegration agent, provided that said first and said second parts differ at least by either one of type of polyolefin, type of prodegradation/prodisintegration agent and level of prodegradation/prodisintegration agent, the types of polyolefin and of prodegradation/prodisintegration agent and the levels of prodegradation/prodisintegration agent being selected so as said part (B) degrades more slowly than said part (A), and said part (B) at least partially covers said part (A).

Abstract: A resin composition comprising a polyolefin, a nanoclay and poly(hydroxy carboxylic acid). The invention also covers a process for preparing a resin composition comprising a polyolefin, a nanoclay and poly(hydroxy carboxylic acid) by (i) blending a poly(hydroxy carboxylic acid) with a nanoclay to form a composite (ii) blending the composite with a polyolefin. The use of poly(hydroxy carboxylic acids) as a compatibiliser to blend nanoclays into polyolefins is also claimed.

Abstract: A catalytic system usable for the copolymerization of at least one conjugated diene and at least one monoolefin, a process for preparing this catalytic system, a process for preparing a copolymer of a conjugated diene and at least one monoolefin using said catalytic system, and said copolymer are described.

Abstract: The present invention discloses efficient methods for preparing substituted cyclopentadienyl-fluorenyl catalyst components having a diphenyl bridge.

Abstract: A resin composition comprising at least 0.1% by weight of poly(hydroxy carboxylic acid) and at least 50% by weight of polypropylene prepared with a single-site catalyst, preferably with a metallocene catalyst.