Patent application number | Description | Published |
20080287619 | Supported metallocene catalysts - Method employing a supported metallocene catalyst composition in the production of an isotactic ethylene propylene co-polymer. The composition comprises a metallocene component supported on a particulate silica support having average particle size of 10-40 microns, a pore volume of 1.3-1.6 ml/g, a surface area of 200-400 m 2/g. An alkylalumoxane cocatalyst component is incorporated on the support. The isospecific metallocene is characterized by the formula: | 11-20-2008 |
20100234544 | Process for the Polymerisation of Olefins - A process for the polymerisation of olefins comprising the steps of: a) passing an olefin-containing hydrocarbon feedstock over a sorbent material comprising nickel deposited on a support material wherein said nickel is present as both nickel oxide and metallic nickel; b) converting at least part of the olefins contained in said hydrocarbon feedstock into a polymer over one or more metallocene catalysts; and c) recovering the polymer product. | 09-16-2010 |
20110112262 | SUPPORTED METALLOCENE CATALYSTS - Method employing a supported metallocene catalyst composition in the production of an isotactic ethylene propylene co-polymer. The composition comprises a metallocene component supported on a particulate silica support having average particle size of 10-40 microns, a pore volume of 1.3-1.6 ml/g, a surface area of 200-400 m | 05-12-2011 |
20110207898 | Method for Transitioning Between Ziegler-Natta and Metallocene 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 propylene towards the junction and maintaining a portion of the flow of metallocene separate from a portion of the flow propylene within a portion of the junction downstream of the flow of propylene into the junction. In another embodiment, a method of introducing a quantity of antifouling agent into a catalyst mixing system is provided. In this embodiment a portion of the antifouling agent is introduced at or downstream of a point of contact of a stream of propylene with a stream of catalyst. The antifouling agent may be a member, alone or in combination with other members, selected from Stadis 450 Conductivity Improver, Synperonic antifouling agent, and Pluronic antifouling agent. | 08-25-2011 |
20110263802 | Formation of Ziegler-Natta Catalyst Using Non-blended Components - Methods of forming a catalyst, catalysts, polymerization processes and polymers formed therefrom are described herein. The method of forming a catalyst generally includes contacting an alkyl magnesium compound with an alcohol to form a magnesium alkoxide compound; contacting the magnesium alkoxide compound with a first titanium alkoxide and a first agent to form a reaction product “A”, wherein the titanium alkoxide and the first agent are nonblended individual components prior to contacting the magnesium alkoxide; and sequentially contacting the reaction product “A” with a second agent, followed by a third agent, and subsequently a first reducing agent to form a catalyst component. | 10-27-2011 |
20110269923 | 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-Natta catalyst systems including a diether internal electron donor and a metallocene catalyst represented by the general formula XCp | 11-03-2011 |
20120010376 | Multi-Component Catalyst Systems and Polymerization Processes for Forming Broad Composition Distribution Polymers - Propylene polymerization processes, polymers and films formed therefrom are described herein. The propylene polymerization processes generally include contacting propylene and an amount of ethylene with a first metallocene catalyst and a second metallocene catalyst within a polymerization reaction vessel to form a propylene based polymer, wherein the amount is an amount effective to form the propylene based polymer including from about 2 wt. % to about 6 wt. % ethylene, the second metallocene catalyst is capable of incorporating a greater amount of ethylene into the propylene based polymer than the first metallocene catalyst and wherein the first metallocene catalyst is capable of forming a propylene/ethylene random copolymer exhibiting a melting temperature that is greater than that of a propylene/ethylene random copolymer formed from the second metallocene catalyst. | 01-12-2012 |
20120216864 | Apparatus and Method for Extending Polyolefin Containing Photovoltaic Panel Life Span - A photovoltaic cell containing at least one substrate, two electrode layers, an organic photovoltaic layer situated between the two electrode layers, and an oxygen scavenger composition. | 08-30-2012 |
20120264894 | Multi-Component Catalyst Systems and Polymerization Processes for Forming Broad Composition Distribution Polymers - Propylene polymerization processes, polymers and films formed therefrom are described herein. The propylene polymerization processes generally include contacting propylene and an amount of ethylene with a first metallocene catalyst and a second metallocene catalyst within a polymerization reaction vessel to form a propylene based polymer, wherein the amount is an amount effective to form the propylene based polymer including from about 2 wt. % to about 6 wt. % ethylene, the second metallocene catalyst is capable of incorporating a greater amount of ethylene into the propylene based polymer than the first metallocene catalyst and wherein the first metallocene catalyst is capable of forming a propylene/ethylene random copolymer exhibiting a melting temperature that is greater than that of a propylene/ethylene random copolymer formed from the second metallocene catalyst. | 10-18-2012 |
20130018157 | SUPPORTED METALLOCENE CATALYSTS - Method employing a supported metallocene catalyst composition in the production of an isotactic ethylene propylene co-polymer. The composition comprises a metallocene component supported on a particulate silica support having average particle size of 10-40 microns, a pore volume of 1.3-1.6 ml/g, a surface area of 200-400 m | 01-17-2013 |
20130102743 | 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-Natta catalyst systems including a diether internal electron donor and a metallocene catalyst represented by the general formula XCp | 04-25-2013 |
20130230718 | Polyolefin Produced with a High Performance Support for a Metallocene Catalyst System - The invention is directed to a metallocene catalyst system and a process for preparing the system. The metallocene catalyst system comprises a support and metallocene bound substantially throughout the support. The selection of certain supports facilitates the production of metallocene catalyst systems having increased catalytic activity than previously recognized. | 09-05-2013 |
20140005035 | Supported Metallocene Catalysts | 01-02-2014 |