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 |
20090105433 | 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 | 04-23-2009 |
20090175774 | HYDRATE INHIBITION TEST LOOP - The detecting and monitoring of solid structure or phase transformation, such as those used for testing the formation of gas hydrates and their inhibition by chemical additives may be conducted in a multi-test assembly of laboratory bench scale loops. The test loop contains a fluid that includes water and hydrate-forming guest molecules such as methane, ethane, carbon dioxide and the like at hydrate-forming conditions of low temperature and high pressure. A small bit or “pig” may be circulated through the test loop at variable speeds. The pig may be moved or impelled through the test loop remotely. The formation of hydrates may be monitored with consistent and reproducible results. | 07-09-2009 |
20100018712 | METHOD OF TRANSITIONING TO KINETIC HYDRATE INHIBITORS IN MULTIPLE TIE-IN WELL SYSTEMS - The technical challenges for a smooth transition between using both a thermodynamic hydrate inhibitor (THI) and a kinetic hydrate inhibitor (KHI) to simply using only the KHI in multiple tie-in gas natural gas production systems is solved by adding more THI in a first pipeline leg of the production system while ceasing adding THI in a second pipeline leg of the system. Further, more KHI is added into the second leg of the system, and subsequently THI is gradually and/or slowly reduced in the remaining legs of the system until only KHI is being injected, after which the KHI amount in all legs may be reduced to the equilibrium or steady-state levels. | 01-28-2010 |
20100099834 | 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 compound including TIBAl, wherein the component is selected from the support composition, the transition metal catalyst compound and combinations thereof and contacting the support composition with a transition metal catalyst compound to form a supported catalyst system. | 04-22-2010 |
20100130747 | Oxazolidinium Compounds and Use as Hydrate Inhibitors - Oxazolidinium compounds are formed by the reaction of a halohydrin or an epoxide with a secondary amine and an aldehyde or a ketone. The oxazolidinium compounds are formed directly and do not require the reaction of a pre-formed oxazolidine with an alkylating agent. The compounds are useful as gas hydrate inhibitors in oil and gas production and transportation. | 05-27-2010 |
20100144559 | Kinetic Gas Hydrate Inhibitors in Completion Fluids - Gas hydrate formation in a well completion fluid in the annular space of a hydrocarbon producing well may be controlled by the incorporation of effective amounts of one or more low dose gas hydrate inhibitors, including but not limited to, low dosage hydrate inhibitors (LDHIs), kinetic hydrate inhibitors, dendrimeric or branched compounds, linear polymers and copolymers, grafted or branched linear polymers and copolymers, and onium compounds. | 06-10-2010 |
20110081729 | Hydrate Inhibition Test Loop - The detecting and monitoring of solid structure or phase transformation, such as those used for testing the formation of gas hydrates and their inhibition by chemical additives may be conducted in a multi-test assembly of laboratory bench scale loops. The test loop contains a fluid that includes water and hydrate-forming guest molecules such as methane, ethane, carbon dioxide and the like at hydrate-forming conditions of low temperature and high pressure. A small bit or “pig” may be circulated through the test loop at variable speeds to circulate the fluid in the loop. The pig may be moved or impelled through the test loop remotely. The exterior of the pig and/or the interior of the loop may be smooth and/or have a friction-reducing coating thereon to facilitate movement of the pig through the loop. The formation of hydrates may be monitored with consistent and reproducible results. | 04-07-2011 |
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 |
20110240915 | Precipitation Prevention in Produced Water Containing Hydrate Inhibitors Injected Downhole - The precipitation of polymeric kinetic hydrate inhibitors (KHIs) in stored produced water is prevented or inhibited by incorporating a water immiscible solvent therein having a polarity index greater than about 3. The polymeric KHIs whose precipitation is inhibited or prevented include, but are not limited to, hyperbranched molecules, polyvinylcaprolactam, polyvinylpyrrolidone, and the like. Suitable water immiscible solvents include, but are not necessarily limited to, xylene, toluene, kerosene, mineral spirits, trimethylbenzene, cumene, heavy aromatic naphtha, ethylbenzene, polyethylbenzene, naphthalene, and mixtures thereof. | 10-06-2011 |
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 |
20120172604 | Oxazolidinium Compounds - Oxazolidinium compounds are formed by the reaction of a halohydrin or an epoxide with a secondary amine and an aldehyde or a ketone. The oxazolidinium compounds are formed directly and do not require the reaction of a pre-formed oxazolidine with an alkylating agent. The compounds are useful as gas hydrate inhibitors in oil and gas production and transportation. The oxazolidinium compounds have the structure: | 07-05-2012 |
20120190893 | Tertiary Amine Salt Additives for Hydrate Control - New tertiary amine salts are useful as gas hydrate inhibitors in oil and gas production and transportation. These tertiary amine salts give very good separation from an emulsion, are economic and have reduced toxicity concerns. | 07-26-2012 |
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 |
20120322960 | MULTI-COMPONENT CATALYST SYSTEMS FOR THE PRODUCTION OF REACTOR BLENDS OF POLYPROPYLENE - Embodiments of the invention generally include multicomponent catalyst systems, polymerization processes and reactor blends formed by the processes. The multicomponent catalyst system generally includes a first catalyst component selected from an isotactic directing metallocene catalyst. The multicomponent catalyst system further includes a second syndiotactic directing metallocene catalyst component. | 12-20-2012 |
20120322961 | MULTI-COMPONENT METALLOCENE CATALYST SYSTEMS FOR THE PRODUCTION OF REACTOR BLENDS OF POLYPROPYLENE - Embodiments of the invention generally include multicomponent catalyst systems, polymerization processes and reactor blends formed by the processes. The multicomponent catalyst system generally includes a first catalyst component and a second catalyst component, wherein the second catalyst component is different from the first catalyst component. | 12-20-2012 |
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 |
20140051816 | MULTI-COMPONENT CATALYST SYSTEMS FOR THE PRODUCTION OF REACTOR BLENDS OF POLYPROPYLENE - Embodiments of the invention generally include multicomponent catalyst systems, polymerization processes and reactor blends formed by the processes. The multicomponent catalyst system generally includes a first catalyst component selected from an isotactic directing metallocene catalyst. The multicomponent catalyst system further includes a second syndiotactic directing metallocene catalyst component. | 02-20-2014 |