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| Number | Title | Issue Date |
| 7384883 | Production of catalysts for olefin conversion A process for producing a catalyst for olefin cracking, the process comprising the steps of providing an MFI-type crystalline silicate catalyst, heating the catalyst in steam to remove aluminum from the crystalline silicate framework and extracting aluminum from the... | 06/10/2008 |
| 6977321 | Production of propylene A process for the production of propylene from an olefinic feedstock containing at least one olefin of C4 or greater, the process comprising contacting the olefinic feedstock with a catalyst of the MFI-type having a silicon/aluminum atomic ratio of at lea... | 12/20/2005 |
| 6951968 | Production of olefins A process for the production of olefins by catalytic cracking, the process comprising feeding a hydrocarbon feedstock containing at least one olefin of C4 or greater over a MFI-type crystalline silicate catalyst to produce an effluent containing at least ... | 10/04/2005 |
| 6872363 | Production of polyethylene A process of producing polyethylene, the process comprising copolymerizing ethylene and an alpha-olefinic comonomer comprising from 3 to 8 carbon atoms in the presence of a chromium-based catalyst in a main polymerization reactor and, in a gas-phase preliminary reac... | 03/29/2005 |
| 6713658 | Production of catalysts for olefin conversion A process for producing a catalyst for olefin cracking, the process comprising the steps of providing an MFI-type crystalline silicate catalyst, heating the catalyst in steam to remove aluminum from the crystalline silicate framework and extracting aluminum from the... | 03/30/2004 |
| 6653431 | Low density polyolefin Use of a catalyst system comprising a metallocene catalyst component of general formula R" (CpRn)(Cp'R'n)MQ2 supported on an inert support in the slurry phase production of linear low density polyolefin, wherein Cp is a cy... | 11/25/2003 |
| 6646176 | Production of olefins A process for the catalytic cracking of an olefin-containing feedstock which is selective towards light olefins in the effluent, the process comprising contacting a hydrocarbon feedstock containing at least one olefin with a MFI-type crystalline silicate ... | 11/11/2003 |
| 6646175 | Production of olefins A process for the catalytic cracking of at least one olefin in an olefinic stream containing impurities, the cracking process being selective towards light olefins in the effluent, the process comprising contacting a feedstock olefinic stream containing a... | 11/11/2003 |
| 6630546 | Process for the preparation of a polyolefin Use of a catalyst system comprising a metallocene catalyst component of general formula R"(CpRm) (Cp'R'n)MQ2 supported on an inert support in the slurry phase production of linear low density polyolefin, wherein Cp is a cy... | 10/07/2003 |
| 6630550 | Olefin polymerization catalyst A catalyst for olefin polymerization of the formula: wherein X is an hetero atom ligand with one or two lone pair electrons selected from the elements of Group VA or VIA which is substituted or non-substituted: (C4 Rm 'C5 C | 10/07/2003 |
| 6624110 | Production of Ziegler-Natta catalysts A process for producing a Ziegler-Natta catalyst, the process comprising reacting an organo magnesium compound with a halogenated compound to produce crystalline magnesium halide having an intense diffraction line in an x-ray spectrum thereof at lattice d... | 09/23/2003 |
| 6583243 | Polyolefin production A metallocene compound having the general formula: CpAXMQ1 Q2 Cp'A'X'M'Q1 'Q2 ' wherein Cp and Cp' are each independently a substituted or unsubstituted cyclopentadienyl moiety; M and M' are each independently a... | 06/24/2003 |
| 6579922 | Polyolefins and uses thereof Provided is a high density multimodal polyethylene, having a shear ratio (SR) of 18 or more and comprising at least 20% by weight of a high molecular weight fraction, which high molecular weight fraction has: (a) a density (p) of 0.930 g/cm3 or less... | 06/17/2003 |
| 6579822 | Polyolefin production A metallocene compound having the general formula: CpAXMQ1 Q2 Cp'A'X'M'Q1 'Q2 ' wherein Cp and Cp' are each independently a substituted or unsubstituted cyclopentadienyl moiety; M and M' are each independently a... | 06/17/2003 |
| 6569948 | Polyethylene pipe method Provided is a high density multimodal polyethylene, having a shear ratio (SR) of 18 or more and comprising at least 20% by weight of a high molecular weight fraction, which high molecular weight fraction has: (a) a density (p) of 0.930 g/cm3 or less... | 05/27/2003 |
| 6566450 | Production of multimodal polyethylene A process for the preparation of polyethylene resins having a multimodal molecular weight distribution which comprises: (i) contacting ethylene monomer and a comonomer comprising an alpha-olefin having from 3 to 10 carbon atoms with a first catalyst system in ... | 05/20/2003 |
| 6541413 | Process for producing polyolefins and polyolefin catalyst The present invention provides a process for preparing polyolefins having a multimodal or at least bimodal molecular weight distribution by contacting in a reaction mixture under polymeriation conditions at least one olefin and a catalyst system comprisin... | 04/01/2003 |
| 6538053 | Watertight roofing panels of a bituminous composition Bituminous compositions modified with self-adhesive cold-application polymers generally used for manufacturing of watertight roofing panels, said compositions comprising a mixture containing a rubbery styrene-diene polymeric mixture, one or more tackifyin... | 03/25/2003 |
| 6515086 | Polyolefin production A process for preparing polyolefins having a monomer length of up to C10, which comprises first contacting: (1) a metallocene catalyst component for the preparation of a polyolefin which comprises an isotactic polyolefin or syndiotactic/isotactic block po... | 02/04/2003 |
| 6495114 | Production of silica particles A process for producing ultra fine silica particles, the process comprising directing a plasma jet onto a silicon-containing compound thereby to form silica vapor and condensing the silica vapor on a collection surface.... | 12/17/2002 |
| 6489428 | Titanated chromium-based catalysts to produce polyethylene The present invention relates to a supported chromium-based catalyst titanated under specific conditions and used for the homopolymerisation or the copolymerisation of ethylene. The polyethylene obtained with this catalyst has high shear resirance and env... | 12/03/2002 |
| 6482901 | Titanated chromium/silica-aluminophosphate catalyst The present invention relates to a chromium/silca-aluminophosphate catalyst, titanated under specific conditions and used for the homopolymerisation or the copolymerisation of ethylene. The polyethylene obtained with this catalyst has a high melt potentia... | 11/19/2002 |
| 6479004 | Silica-alumina carriers preparation, hydrogenation catalysts preparation therewith and their use for aromatics hydrogenation The present invention relates to a process for preparing silica-alumina carriers preferably under the form of extrudates. Further, the present invention also provides hydrogenation catalysts prepared thereof. These catalysts are used in an improved proces... | 11/12/2002 |
| 6479589 | Production of multimodal polyethylene A process for preparing polyethylene, including contacting ethylene monomer and an alpha-olefin comonomer to produce a first polyethylene (HLMI of ࣘ0.5 g/10 min, density ࣘ0.925 g/ml). The a catalyst system is a bis tetrahydroindenyl formula (IndH... | 11/12/2002 |
| 6448349 | Syndiotactic/atactic block polyolefins, catalysts and processes for producing the same Metallocene catalysts useful for the preparation of syndiotactic/atactic block polyolefins have the general formula R"(C4 R'm C5 C4 R'n)XMeQ wherein X is an hetero-atom ligand with one or two lone pair electron... | 09/10/2002 |
| 6444732 | Increasing the self-polishing properties of antifouling paints Substituted 1,4,2-oxathiazines and their mono- and di-oxides, disclosed in WO-A-9505739, are used as additive to increase the self-polishing properties of antifouling paints. The additive is used in an amount of 0.5 to 9.9 wt. %, based on the total weight... | 09/03/2002 |
| 6433095 | High density multimodal polyethylene Provided is a high density multimodal polyethylene, having a shear ratio (SR) of 18 or more and a HLMI of 15 g/10 mins or less comprising at least 20% by weight of a high molecular weight fraction, which high molecular weight fraction has: (a) a density (... | 08/13/2002 |
| 6423792 | Production of polyethylene A process for producing a polyethylene resin having a monomodal molecular weight distribution in a single polymerisation reactor using a chromium-based catalyst system, by copolymerising ethylene and an alpha-olefinic-comonomer having from 3 to 8 carbon a... | 07/23/2002 |
| 6423663 | Titanated chromium/silica-aluminophosphate catalyst The present invention relates to a chromium/silica-aluminophosphate catalyst, titanated under specific conditions and used for the homopolymerisation or the copolymerisation of ethylene. The polyethylene obtained with this catalyst has a high melt potenti... | 07/23/2002 |
| 6420303 | Production of powder catalysts A process for the production of a magnesium chloride powder for use in a catalyst, the process comprising vaporizing magnesium chloride in a plasma torch and quenching the vapor with a liquid containing an electron donor to form a magnesium chloride-based... | 07/16/2002 |
| 6417272 | Process for the preparation of block copolymers A process is disclosed for manufacturing coupled radial block copolymers of the S--B--Li type having improved optical properties, which process utilizes coupling agents having from about 3 to about 7 epoxy groups per mole.... | 07/09/2002 |
| 6417131 | Production of polyethylene having a broad molecular weight distribution A process for producing high density polyethylene having a bimodal molecular weight distribution, the process comprising pre-contacting a chromium-based catalyst with an alkyl metal oxane, the chromium-based catalyst comprising chromium oxide on a silica-... | 07/09/2002 |
| 6410476 | Polyolefin production Use of a catalyst system comprising a metallocene catalyst component of general formula R" (CpRm) (Cp'R'n) MQ2 supported on an inert support in the slurry phase production of linear low density polyolefin, wherein Cp is a ... | 06/25/2002 |
| 6410813 | Production of olefins 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 reactor containing a crystalline si... | 06/25/2002 |
| 6407273 | Polyolefin production A metallocene compound having the general formula: CpAXMQ1 Q2 Cp'A'X'M'Q1 'Q2 ' wherein Cp and Cp' are each independently a substituted or unsubstituted cyclopentadienyl moiety; M and M' are each independently a... | 06/18/2002 |
| 6406063 | Pipe fittings A pipe fitting for coupling together opposed ends of two plastics pipes by fusion welding, the pipe fitting comprising an annular body having an inner cylindrical surface of plastics material surrounding a cylindrical cavity for receiving opposed ends of ... | 06/18/2002 |
| 6407192 | Production of polyethylene for blow molding A process for producing high density polyethylene suitable for blow molding and having high environmental stress cracking resistance and rigidity copolymerizing ethylene and an alpha-olefinic comonomer comprising from 3 to 10 carbon atoms, in the presence... | 06/18/2002 |
| 6395392 | Bicomponent fibers of isotactic and syndiotactic polypropylene, methods of making, products made thereof Bicomponent fibers of isotactic polypropylene and syndiotactic polypropylene, methods of making such fibers and products made thereof.... | 05/28/2002 |
| 6388161 | Production of olefins A process for cracking an olefin-rich hydrocarbon feedstock which is selective towards propylene in the effluent, the process comprising contacting a hydrocarbon feedstock containing one or more olefinic components of C4 or greater with a cryst... | 05/14/2002 |
| 6380311 | Process to produce bimodal polyolefins with metallocene catalysts using two reaction zones A process for the preparation of polyolefins having a bi- or multimodal molecular weight distribution, the process comprising the steps of: (i) contacting an olefin monomer and a first co-reactant with a catalyst system in a first reaction zone under firs... | 04/30/2002 |
