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| Number | Title | Issue Date |
| 8178738 | Method for extending catalyst life in processes for preparing vinyl aromatic hydrocarbons Methods and systems for extending the life of a dehydrogenation catalyst are described herein. For example, one embodiment includes providing an alkyl aromatic hydrocarbon feed stream to a reaction chamber, contacting the feed stream with a dehydrogenation catalyst ... | 05/15/2012 |
| 8168112 | Blown films and processes of forming the same Blown films and processes of forming the same are described herein. The processes generally include providing a bimodal ethylene based polymer, blending the bimodal ethylene based polymer with at least about 30 ppm peroxide to form modified polyethylene and forming ... | 05/01/2012 |
| 8153853 | Processes using dividing wall distillation column A method for the separation of hydrocarbon compounds utilizing a dividing wall distillation column is described. The dividing wall distillation column enables one or more side draw stream to be removed from the dividing wall distillation column in addition to an ove... | 04/10/2012 |
| 8153736 | Random copolymers and formulations useful for thermoforming and blow molding applications A composition that may be useful for thermoforming and blow molding applications comprises a metallocene catalyzed propylene-ethylene random copolymer having an ethylene content of from about 0.1 to about 1.5 weight percent based on the copolymer, and exhibits a fle... | 04/10/2012 |
| 8153730 | Polyolefin blends used as masterbatch concentrates Polyolefin blends and processes for forming polyolefin blends are described. The process generally includes forming of polyolefin blends with acrylic monomer system comprising: providing a polyolefin comprising a first portion and a second portion; providing a conce... | 04/10/2012 |
| 8138285 | Fluorinated impregnated catalyst systems and methods of forming the same Methods of forming supported catalyst systems, supported catalyst systems and polymerization processes utilizing the supported catalyst systems are described herein. The methods generally include providing an inorganic support material and contacting the inorganic s... | 03/20/2012 |
| 8138264 | Bimodal polyethylene resins that have high stiffness and high ESCR A bimodal polyethylene having a high density ranging from about 0.955 to about 0.959 g/cc, an improved environmental stress cracking resistance (ESCR) of from about 400 to about 2500 hours, and an improved 0.4% flexural modulus of from about 180,000 to about 260,000... | 03/20/2012 |
| 8110644 | Bimodal pipe resin and products made therefrom Disclosed is a bimodal Ziegler-Natta catalyzed polyethylene, having a density of from 0.930 g/cc to 0.960 g/cc, and a molecular weight distribution of from 10 to 25, wherein an article formed therefrom has a PENT of at least 1500. Also disclosed is a method of prepa... | 02/07/2012 |
| 8110518 | Fluorinated transition metal catalysts and formation thereof Supported catalyst systems and methods of forming the same are described herein. In one specific embodiment, the methods generally include providing an inorganic support material and contacting the inorganic support material with an aluminum fluoride compound repres... | 02/07/2012 |
| 8106123 | Modified resins for blown film Processes for enhancing blown film processability and the blown films formed thereby are described herein. One embodiment of the processes generally includes providing a first propylene based heterophasic copolymer having a first melt flow rate, modifying the first ... | 01/31/2012 |
| 8093418 | Preparation and use of tetrasubstituted fluorenyl catalysts for polymerization of olefins Catalyst compositions and processes for the polymerization of ethylenically unsaturated monomers to produce polymers, including copolymers or homopolymers. Such monomers include ethylene, C3+ alpha olefins and substituted vinyl compounds, such as styrene ... | 01/10/2012 |
| 8093332 | High impact polystyrene and process for preparing same Disclosed are high impact polystyrenes prepared using mixed initiators. The mixed initiators include at least one grafting initiator and one non-grafting initiator. The high impact polystyrenes prepared therewith have a continuous polystyrene phase and dispersed the... | 01/10/2012 |
| 8093308 | Styrenic polymer compositions and methods of making and using same A method comprising contacting a first styrenic polymer composition comprising residual styrene monomer with a molecular sieve, and recovering a second styrenic polymer composition comprising a reduced amount of residual styrene monomer. A composition comprising a s... | 01/10/2012 |
| 8076527 | Process for production of ethylbenzene from toluene and methane A process for making ethylbenzene and/or styrene by reacting toluene with methane is disclosed. In one embodiment the process can include reacting toluene with methane to form a product stream comprising ethylbenzene and further processing the ethylbenzene to form s... | 12/13/2011 |
| 8075830 | Polypropylene blown film A blown film that comprises polypropylene that has a melt flow rate of 1.8 to 14.0 g/10 min. and a melting point of at least 115Ā° C. The blown film has a haze of less than 10% and a gloss of greater than 70%. The blown film may be co-extruded with a medium density ... | 12/13/2011 |
| 8071836 | Process for toluene and methane coupling in a microreactor A process for making ethylbenzene and/or styrene by reacting toluene with methane in one or more microreactors is disclosed. In one embodiment a method of revamping an existing styrene production facility by adding one or more microreactors capable of reacting tolue... | 12/06/2011 |
| 8066954 | Plug flow reactor and polymers prepared therewith A plug flow reactor having an inner shell 27 surrounded by outer shell 21 and having at least one annular flow passage 35 therebetween can be used to prepare compositions, including polymers. The plug flow reactor also includes inlet port 36 | 11/29/2011 |
| 8063259 | Toluene disproportionation using Nb/mordenite catalyst A molecular sieve catalyst useful in the conversion of hydrocarbons containing niobium is disclosed, along with a process for the disproportionation of toluene to benzene and xylene using such catalyst. ... | 11/22/2011 |
| 8007699 | Process of making bicomponent fiber Bicomponent fibers, methods of forming bicomponent fibers and articles formed from bicomponent fibers are described herein. The bicomponent fibers generally include a sheath component and a core component, wherein the sheath component consists essentially of a first... | 08/30/2011 |
| 8003741 | Ziegler-Natta catalyst The present invention relates generally to catalysts, to methods of making catalysts, to methods of using catalysts, to methods of polymerizing, and to polymers made with such catalysts. More particularly, the present invention relates to polyolefin catalysts and to... | 08/23/2011 |
| 8003739 | Multi-component catalyst systems and polymerization processes for forming in-situ heterophasic copolymers and/or varying the xylene solubles content of polyolefins Embodiments of the invention generally include multi-component catalyst systems, polymerization processes and heterophasic copolymers formed by the processes. The multi-component catalyst system generally includes a first catalyst component selected from Ziegler-Nat... | 08/23/2011 |
| 7998265 | Asphalt compositions and the preparation thereof Asphalt compositions and methods of forming such are described herein. The asphalt compositions and methods of forming such are generally adapted to enable open air processing while producing asphalt compositions that exhibit properties capable of meeting SUPERPAVEā... | 08/16/2011 |
| 7981377 | Dehydrogenation of alkyl aromatics Dehydrogenation of a reactor system of one or more vertically oriented flow reactors equipped with a system for introducing a catalyst extender into the inlet of the reactor. A vertically oriented radial flow reactor comprises inner and outer reactor tubes having pe... | 07/19/2011 |
| 7973113 | Transition metal catalyst systems and formation thereof Catalyst systems and methods of forming the catalyst systems are described herein. The methods generally include contacting a support material with an activator to form a support composition, contacting a component with at least a portion of an aluminum containing c... | 07/05/2011 |
| 7973111 | Mechanically operated kill agent injection safety system and method to stop a runaway chemical reaction Disclosed is a method to safely terminate a runaway reaction within a reaction vessel, comprising: sensing an increase in pressure in the reaction vessel, opening a barrier blocking a flow path into the reactor, wherein the barrier opening is achieved via a mechanic... | 07/05/2011 |
| 7960484 | Method for transitioning between ziegler-natta and metalocene catalysts in a bulk loop reactor for the production of polypropylene Polymerization processes in a bulk loop reactor are described herein. In particular, a method of contacting a flow of metallocene with a flow of propylene is provided. This method includes directing the flow of metallocene towards a junction, directing the flow of p... | 06/14/2011 |
| 7956157 | Processes using dividing wall distillation column A method for the separation of hydrocarbon compounds utilizing a dividing wall distillation column is described. The dividing wall distillation column enables one or more side draw stream to be removed from the dividing wall distillation column in addition to an ove... | 06/07/2011 |
| 7943545 | Polyethylene materials prepared using mixed ziegler-natta catalyst systems A polyethylene may be prepared using a mixture of a silica supported catalyst and a magnesium chloride supported catalyst. By changing the ratio of the two catalysts, the polyethylene produced may have a varying bulk density and shear response. The method allows for... | 05/17/2011 |
| 7919661 | Method for production of styrene from toluene and syngas A method for the production of styrene comprising reacting toluene and syngas in one or more reactors is disclosed. ... | 04/05/2011 |
| 7919641 | Synthesis of styrene-soluble ionic comonomer A method for the in-situ preparation of an ionic comonomer, such as zinc dimethacrylate, dissolved in styrene monomer, for use in production of polystyrene is disclosed. The method generally includes adding comonomer chemical precursors to a solution of styrene and ... | 04/05/2011 |
| 7919640 | Synthesis with metal methacrylates as comonomers A method for the in-situ preparation of an ionic comonomer from its chemical precursors, prepared in a solution of styrene monomer is disclosed. In one embodiment, the ionic comonomer is zirconium methacrylate, Zr(MA)4 or zirconyl methacrylate, ZrO(MA) | 04/05/2011 |
| 7902325 | Polypropylene having reduced residual metals Polymerization processes are described herein. The polymerization processes generally include introducing a catalyst system to a reaction zone, introducing an olefin monomer to the reaction zone, contacting the olefin monomer with the catalyst system to form a polyo... | 03/08/2011 |
| 7893181 | Bimodal film resin and products made therefrom A polymer, and a process of producing the polymer, that comprises at least one olefin and has a density of 0.955 g/cc to 0.959 g/cc and a secant modulus 140,000 psi to 220,000 psi. A film that comprises the polymer, that has a thickness of 0.5 mil to 10 mil, a drop ... | 02/22/2011 |
| 7893171 | Polymer compositions for reduced shrinkage A polymeric composition comprising a polymer and a nucleation agent, and having isotropic shrinkage of less than about 20% and a differential shrinkage of less than about 20%. ... | 02/22/2011 |
| 7892475 | Blends of polypropylene impact copolymers with other polymers It has been discovered that the properties of sheet or film materials of broad molecular weight distribution ethylene/propylene rubber impact-modified heterophasic copolymer (ICP) can be improved by blending the ICP with a second polyolefin. The second polyolefin ma... | 02/22/2011 |
| 7861410 | Heat treated devolatilizer nozzle A method is provided for perforating a steel plate, forming a devolatilizer nozzle from the steel plate, and heat treating the devolatilizer nozzle. The devolatilizer nozzle may have a yield strength of at least about 110 ksi, and a tensile strength of at least abou... | 01/04/2011 |
| 7851578 | Succinate-containing polymerization catalyst system using n-butylmethyldimethoxysilane for preparation of polypropylene film grade resins It has been discovered that using n-butylmethyldimethoxysilane (BMDS) as an external electron donor for succinate-containing Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties. The catalyst systems of ... | 12/14/2010 |
| 7834095 | Polystyrene blends and a method of making same Disclosed are blends of polystyrene and at least one of syndiotactic polypropylene, ethylene propylene copolymers, and styrene-butadiene-styrene triblock copolymers. These blends are prepared using solution polymerization and have unique morphologies and desirable p... | 11/16/2010 |
| 7825196 | Color reduction in polyethylene modified by radical initiation Polyethylene modified by using radical initiators such as oxygen and peroxides sometimes has a yellow color which may be reduced or eliminated by incorporating additives such as polyethylene glycol, and/or neutralizing species such as alkali metal stearates, particu... | 11/02/2010 |
| 7824485 | Asphalt compositions and the preparation thereof Asphalt compositions and methods of forming such are described herein. The asphalt compositions and methods of forming such are generally adapted to enable open air processing while producing asphalt compositions that exhibit properties capable of meeting SUPERPAVEā... | 11/02/2010 |
