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| Number | Title | Issue Date |
| 7488790 | Processing of bimodal polymers The present invention discloses the use of a supercritical fluid to improve the homogeneity of heterogeneous bi- or multi-modal resins resulting from a physical or a chemical blend of two or more fractions of the same type of polymer resin, said fractions having dif... | 02/10/2009 |
| 7473743 | Surface finish of reactor This invention discloses the use in the production of a polyolefin of a slurry loop reactor wherein all internal parts in contact with the slurry are polished first by a mechanical process to a level of at most 70 RMS roughness value and are subsequently polished by... | 01/06/2009 |
| 7470757 | Olefin polymerization process in the presence of an anti-fouling agent 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 gr... | 12/30/2008 |
| 7449527 | Polyolefin production 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 compo... | 11/11/2008 |
| 7399402 | Method for hydrotreatment of a mixture of hydrocarbon compounds, rich in olefins and aromatic compounds 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 hydroca... | 07/15/2008 |
| 7375257 | Process for cracking an olefin-rich hydrocarbon feedstock 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 si... | 05/20/2008 |
| 7329712 | Swell control in slurry loop reactor 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... | 02/12/2008 |
| 7309748 | Group III bridged ionic metallocene based on cyclopentadienyl-fluorenyl ligands 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 unsu... | 12/18/2007 |
| 7300901 | Hollow beads of polyethylene The present invention discloses a method for preparing hollow beads of polyethylene of controlled morphology and size. ... | 11/27/2007 |
| 7294604 | Hydrogenation and dehydrogenation processes and catalysts therefor 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, ... | 11/13/2007 |
| 7282544 | Olefin polymerisation process in the presence of an anti-fouling agent A propylene polymerisation process carried out in the presence of an anti-fouling agent; characterised in that the anti-fouling agent comprises an anti-fouling polymer containing: (1) one or more blocks —(CH2—CH... | 10/16/2007 |
| 7271122 | Multimodal polyethylene obtained with multilayer chromium catalyst The present invention concerns a catalyst for the production of high density polyethylene, by homopolymerising ethylene or copolymerising ethylene and an alpha-olefinic comonomer comprising 3 to 10 carbon atoms, prepared by the steps of: a) selecting a silica suppor... | 09/18/2007 |
| 7265184 | Polymer hydrogenation process A process for hydrogenating unsaturations in polymers, the process comprising contacting at least one polymer having unsaturations 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 hav... | 09/04/2007 |
| 7241849 | Group III bridged metallocene based on cyclopentadienyl-fluorenyl ligands The present invention discloses a metallocene catalyst component of formula (Flu-R″-Cp)M(η3-C3R′5)(ether)n (I) wherein Cp is a cyclopentadienyl, substituted or unsubstituted, Flu is a fluorenyl, substituted or unsubst... | 07/10/2007 |
| 7193025 | Metallocene polypropylene for rotomoulding The present invention is concerned with single layer articles produced by rotomoulding and consisting essentially of metallocene-produced syndiotactic polypropylene or isotactic random copolymer of propylene. ... | 03/20/2007 |
| 7169827 | Production of polypropylene having improved properties A process for producing polypropylene having increased melt strength, the process comprising irradiating polypropylene which has been polymerised using a Ziegler-Natta catalyst with an electron beam having an energy of at least 5 MeV and a radiation dose of at least... | 01/30/2007 |
| 7041756 | Catalyst component comprising a metallocene with two tetrahydroindenyl ligands for producing a polyolefin Provided is a catalyst component for producing a polyolefin, which catalyst component comprises a metallocene catalyst having a structure according to formula (I): (THI)2R″MQp, wherein each THI is a tetrahydroindenyl derivative which may be s... | 05/09/2006 |
| 7034092 | Process for producing bimodal polyethylene resins A process for producing bimodal polyethylene resins in two reactors in series, the process comprising producing a first polyethylene resin fraction in a first slurry loop reactor in a diluent in the presence of a catalyst and producing a second polyethylene resin fr... | 04/25/2006 |
| 7019044 | Production of polyolefins having improved properties A process for producing polypropylene having increased melt strength, the process comprising (i) homopolymerising polypropylene or copolymerising propylene with one or more comonomers selected from ethylene and C4 to C101-olefins to produce a polypropylene homopolym... | 03/28/2006 |
