System and method for chirp-based transmission

An electromagnetic transmission system is provided, comprising: M chirp generators, each operating at a first frequency, each of the M chirp generators being configured to generate an i th digital chirp portion comprising (1/M) th of a digital chirp signal having a set ramp rate; a parallel-in serial-out register configured to receive the M digital chip portions in parallel at the first frequency, and configured to output the M digital chip portions in series as the digital chirp signal at a second frequency; and a digital-to-analog converter operating at the second frequency and configured to convert the digital chirp signal into an analog chirp signal, wherein i is an index that goes from 1 to M, and wherein the second frequency is M times the first frequency.

Furnace system with case integrated cooling system

An infrared firing furnace includes a case-integrated cooling system to provide high performance cooling as the first step in the cooling process. The cooling system includes a cooling manifold integrated into, and made from, the same case material as the adjacent firing zone. As the cooling system is made from the same material as the rest of the case, it can handle being exposed to higher temperatures. The cooling system is positioned such that the plane of its outlet is at a specific clearance level relative to the product passing underneath. High pressure cooling jets of air are directed downward toward the products as they pass under the cooling manifold in order to quickly bring the temperature of the products down from the much higher firing temperature, and minimize the dwell time of the product at the higher temperature.

Method for deploying and recovering a wave energy converter

A system for transporting a buoy and a heave plate. The system includes a buoy and a heave plate. An outer surface of the buoy has a first geometrical shape. A surface of the heave plate has a geometrical shape complementary to the first geometrical shape of the buoy. The complementary shapes of the buoy and the heave plate facilitate coupling of the heave plate to the outer surface of the buoy in a transport mode.

Applications of ocean wave energy convertors

A system for production of desalinated water includes a wave energy convertor for conversion of mechanical energy from ocean waves into electricity and mechanical energy in the form of a salt-water stream. The system further includes a desalination unit coupled to the wave energy convertor. The system further includes an electrical connection from the wave energy convertor to the desalination unit, configured to supply the electricity to the desalination unit. The system further includes a conduit to supply the salt-water stream produced by the wave energy convertor to the desalination unit, wherein the desalination unit is configured to produce desalinated water.

Bimodal polyethylene

Provided are various bimodal polyethylene, including but not limited to a bimodal polyethylene for a pipe having a density of from 0.9340 to 0.9470 gram/cubic centimeters (g/ccm), a melt index (12) of from 0.1 to 0.7 gram/10 minute, a melt flow ratio (121/12) of from 20 to 90. The bimodal polyethylene includes a high molecular weight polyethylene component and a low molecular weight polyethylene component which are a reaction product of a polymerization process performed in a single reactor and that employs a bimodal polymerization catalyst system. The bimodal polymerization catalyst system includes a bimodal catalyst system of bis(2-pentamethylphenylamido)ethyl)amine Zirconium dibenzyl and either (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)Zirconium dichloride or (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)zirconium dimethyl in a 3.0:1 molar ratio; and a trim catalyst of (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)Zirconium dichloridedimethyl in heptane added to adjust melt flow ratio of the bimodal polyethylene.

Multiport df antennas and df systems

A multi-port antenna and associated systems having extremely wide bandwidth and capable of maintaining directivity as frequency decreases and is made arbitrarily low, allowing DF systems to operate to arbitrarily low frequency regardless of size. Construction may be rugged, lightweight, and low cost, allowing reliable service in harsh environments. The systems allow utilization of both the E and H fields occupying a common area of space. The disclosed DF system takes advantage of knowledge of the as-installed array manifold, uses pattern matching to determine the angle of arrival (AoA) of incoming waves, and enhances sensitivity by using integration on cross-correlation products between the multiple ports to achieve SNR improvement.

Skateboard / Longboard Truck with Improved Mechanical Advantage

A skateboard or longboard truck comprises a hanger and a baseplate assembly. A redesigned hanger, a large ball pivot, a load-redirecting pivot cup, a tapered kingpin and other improvements give the hanger a high kingpin ratio and a high angle of mechanical advantage, thereby improving the performance and turning characteristics of the truck.

Methods and Systems for Olefin Polymerization

Methods and systems for olefin polymerization are provided. The method for olefin polymerization can include flowing a catalyst through an injection nozzle and into a fluidized bed disposed within a reactor. The method can also include flowing a feed comprising one or more monomers, one or more inert fluids, or a combination thereof through the injection nozzle and into the fluidized bed. The feed can be at a temperature greater than ambient temperature. The method can also include contacting one or more olefins with the catalyst within the fluidized bed at conditions sufficient to produce a polyolefin.

Catalyst composition, methods of preparation and use in a polymerization process

Polymerization catalyst compositions are provided as are methods of their preparation. The compositions comprise fatty amines and find advantageous use in olefin polymerization processes. The catalyst composition comprises at least one supported polymerization catalyst wherein the catalyst composition is modified with at least one fatty amine wherein the fatty amine is substantially free of particulate inorganic material.

Lift mechanism for robotic shuttle system

A robotic shuttle system includes a rack system and one or more shuttles. The rack system includes a rack and a shuttle frame. The rack has storage locations for containers containing items. The shuttle frame has rails disposed along the rack. The shuttle includes a powertrain, container transfer mechanism, and a robot arm. The power train is configured to move the shuttle along the rails of the rack and on a surface outside of the rack system. The container transfer mechanism is configured to transfer the containers between the rack and the shuttle. The robot arm extends from the shuttle to transfer the items between one of the containers on the shuttle and a container in a container holder of the shuttle.

Combination of an alk inhibitor and a cdk inhibitor for the treatment of cell proliferative diseases

The present invention relates to a pharmaceutical combination comprising, separately or together, (1) a first agent which is an ALK inhibitor or a pharmaceutically acceptable salt thereof and (2) a second agent which is a CDK inhibitor or a pharmaceutically acceptable salt thereof. The invention further relates the use of such combination in the treatment or prevention of proliferative diseases.

Survivability of Wave Energy Convertors

A wave energy conversion (WEC) system includes a float body, a heave plate, a tether, and a controller. The tether couples the heave plate to the float body. The controller controls the tether between survivability modes. Each survivability mode adjusts a tension and/or length of the tether.

Polyethylene copolymer resins and films

An ethylene/alpha-olefin copolymer that can be synthesized in a fluidized-bed, gas phase polymerization reactor and made into a blown film. The ethylene/alpha-olefin copolymer is characterized by a bubble stability-effective combination of properties comprising density, melt flow ratio ("I21/I5"), and melt storage modulus G' (G"=3,000 Pa). The synthesis in the FB-GPP reactor is characterized by a property-imparting-effective combination of operating conditions comprising reactor bed temperature and H2/C2 gas molar ratio. An embodiment of the blown film consisting of the ethylene/alpha-olefin copolymer is characterized by enhanced bubble stability. A method of making the ethylene/alpha-olefin copolymer. A film comprising the ethylene/alpha-olefin copolymer. A method of making the film. A manufactured article comprising the film.

Gas phase polymerization reactions utilizing soluble unsupported catalysts

Gas phase polymerization processes are disclosed which utilize unsupported soluble transition metal coordination catalysts. The catalysts are introduced into the reactor as a solution.

Method for controlling bimodal catalyst activity during polymerization

Method for controlling bimodal catalyst activity during polymerization

A method of performing a polymerization reaction in a gas phase polymerization reactor to produce a bimodal polymer while controlling activity of a bimodal polymerization catalyst composition in the reactor by controlling concentration of at least one induced condensing agent ('ICA') in the reactor is provided. In some embodiments, the ICA is isopentane (or another hydrocarbon compound) and the bimodal catalyst composition includes a Group 15 and metal containing catalyst compound (or other HMW catalyst for catalyzing polymerization of a high molecular weight fraction of the product), and a metallocene catalyst compound (or other LMW catalyst for catalyzing polymerization of a low molecular weight fraction of the product).

Method for controlling bimodal catalyst activity during polymerization

A method of performing a polymerization reaction in a gas phase polymerization reactor to produce a bimodal polymer while controlling activity of a bimodal polymerization catalyst composition in the reactor by controlling concentration of at least one induced condensing agent (‘ICA’) in the reactor is provided. In some embodiments, the ICA is isopentane (or another hydrocarbon compound) and the bimodal catalyst composition includes a Group 15 and metal containing catalyst compound (or other HMW catalyst for catalyzing polymerization of a high molecular weight fraction of the product), and a metallocene catalyst compound (or other LMW catalyst for catalyzing polymerization of a low molecular weight fraction of the product).

System for olefin polymerization

A system and method for olefin polymerization is provided. The method includes polymerizing one or more olefins within a reactor having one or more injection tubes in fluid communication therewith, at least one of the one or more injection tubes having two or more concentric flow paths; flowing a catalyst through a first flow concentric path of the injection tube into the reactor; flowing one or more monomers through a second concentric flow path of the injection tube into the reactor; measuring rate of heat removal within the reactor; and adjusting the one or more monomers flow through the injection tube in response to the rate of heat removal in the reactor.

Methods of monitoring and controlling the melt index of a polyolefin product during production

Methods for producing polyolefin polymers may use a predictive melt index regression to estimate the melt index of the polyolefin during production based on the composition of the gas phase and, optionally, the concentration of catalyst in the reactor or reactor operating conditions. Such predictive melt index regression may include multiple terms to account for concentration of ICA in the reactor, optionally concentration of hydrogen in the reactor, optionally concentration of comonomer in the reactor, optionally the catalyst composition, and optionally reactor operating conditions. One or more terms may independently be represented by a smoothing function that incorporates a time constant.

Method of polymerization

This invention relates to a polymerization process comprising combining an olefin in the gas or slurry phase with a spray dried catalyst comprising an activator, a particulate filler and a metal catalyst compound.

Polyethylene copolymer resins and films

An ethylene/alpha-olefin copolymer that can be synthesized in a fluidized-bed, gas phase polymerization reactor and made into a blown film. The ethylene/alpha-olefin copolymer is characterized by a bubble stability-effective combination of properties comprising density, melt flow ratio (“I 21 /I 5 ”), and melt storage modulus G′ (G″=3,000 Pa). The synthesis in the FB-GPP reactor is characterized by a property-imparting-effective combination of operating conditions comprising reactor bed temperature and H2/C2 gas molar ratio. An embodiment of the blown film consisting of the ethylene/alpha-olefin copolymer is characterized by enhanced bubble stability. A method of making the ethylene/alpha-olefin copolymer. A film comprising the ethylene/alpha-olefin copolymer. A method of making the film. A manufactured article comprising the film.

Slurry Catalyst Flow Splitters and Methods of Using the Same

A system for feeding a slurry catalyst composition including: a primary slurry feed system comprising a primary slurry flow meter and a primary catalyst injection device, wherein the primary slurry flow meter measures a primary slurry catalyst composition flow rate to the primary catalyst injection device; and a secondary slurry feed system comprising a secondary slurry flow meter, a secondary carrier liquid, a secondary carrier liquid control device, and a secondary catalyst injection device, wherein the secondary slurry flow meter measures a secondary slurry catalyst composition flow rate to the secondary catalyst injection device, wherein the secondary carrier liquid control device controls a process parameter of the secondary slurry feed system based a ratio of the primary slurry catalyst composition flow rate to the secondary slurry catalyst composition flow rate.

Slurry catalyst flow splitters and methods of using the same

A system for feeding a slurry catalyst composition including: a primary slurry feed system comprising a primary slurry flow meter and a primary catalyst injection device, wherein the primary slurry flow meter measures a primary slurry catalyst composition flow rate to the primary catalyst injection device; and a secondary slurry feed system comprising a secondary slurry flow meter, a secondary carrier liquid, a secondary carrier liquid control device, and a secondary catalyst injection device, wherein the secondary slurry flow meter measures a secondary slurry catalyst composition flow rate to the secondary catalyst injection device, wherein the secondary carrier liquid control device controls a process parameter of the secondary slurry feed system based a ratio of the primary slurry catalyst composition flow rate to the secondary slurry catalyst composition flow rate.

Slurry Catalyst Flow Splitters and Methods of Using the Same

A system for feeding a slurry catalyst composition including: a primary slurry feed system comprising a primary slurry flow meter and a primary catalyst injection device, wherein the primary slurry flow meter measures a primary slurry catalyst composition flow rate to the primary catalyst injection device; and a secondary slurry feed system comprising a secondary slurry flow meter, a secondary carrier liquid, a secondary carrier liquid control device, and a secondary catalyst injection device, wherein the secondary slurry flow meter measures a secondary slurry catalyst composition flow rate to the secondary catalyst injection device, wherein the secondary carrier liquid control device controls a process parameter of the secondary slurry feed system based a ratio of the primary slurry catalyst composition flow rate to the secondary slurry catalyst composition flow rate.

Slurry catalyst flow splitters and methods of using the same

A system for feeding a slurry catalyst composition including: a primary slurry feed system comprising a primary slurry flow meter and a primary catalyst injection device, wherein the primary slurry flow meter measures a primary slurry catalyst composition flow rate to the primary catalyst injection device; and a secondary slurry feed system comprising a secondary slurry flow meter, a secondary carrier liquid, a secondary carrier liquid control device, and a secondary catalyst injection device, wherein the secondary slurry flow meter measures a secondary slurry catalyst composition flow rate to the secondary catalyst injection device, wherein the secondary carrier liquid control device controls a process parameter of the secondary slurry feed system based a ratio of the primary slurry catalyst composition flow rate to the secondary slurry catalyst composition flow rate.

Catalyst composition, methods of preparation and use in a polymerization process

Polymerization catalyst compositions are provided as are methods of their preparation. The compositions comprise fatty amines and find advantageous use in olefin polymerization processes. The catalyst composition comprises at least one supported polymerization catalyst wherein the catalyst composition is modified with at least one fatty amine wherein the fatty amine is substantially free of particulate inorganic material.

Method to control the activity of a bimodal catalyst during a polymerization

Un método de polimerización, que incluye los pasos de: (a) hacer funcionar un reactor de polimerización en fase gaseosa para realizar una reacción de polimerizaciónque produce un polímero bimodal, en donde la reacción es catalizada por una composición de catalizador depolimerización bimodal, en donde la composición de catalizador de polimerización bimodal comprende almenos un catalizador HMW para catalizar la polimerización de una fracción de peso molecular alto delpolímero y al menos un catalizador LMW que es un compuesto catalítico de metaloceno para catalizar lapolimerización de una fracción de peso molecular bajo del polímero, y en donde el catalizador HMWcomprende un compuesto que contiene Grupo 15 y metal representado por las fórmulas. A polymerization method, which includes the steps of: (a) operating a gas phase polymerization reactor to perform a polymerization reaction that produces a bimodal polymer, wherein the reaction is catalyzed by a bimodal depolymerization catalyst composition, wherein The bimodal polymerization catalyst composition comprises at least one HMW catalyst to catalyze the polymerization of a high molecular weight fraction of the polymer and at least one LMW catalyst which is a metallocene catalyst compound to catalyze the polymerization of a low molecular weight fraction of the polymer, and wherein the HMW catalyst comprises a compound containing Group 15 and metal represented by the formulas.

Method and apparatus for monitoring electrical properties of polymerization reactor wall film

Disclosed is a method for using at least one static probe during polymerization in a fluid bed polymerization reactor system to monitor a coating on a surface of the reactor system and a distal portion of each static probe, wherein the coating is exposed to flowing fluid within the reactor system during the reaction. The surface may be a reactor bed wall (exposed to the reactor's fluid bed) and the coating is exposed to flowing, bubbling fluid within the fluid bed during the reaction. The method may include steps of: during the polymerization reaction, operating the static probe to generate a sequence of data values (“high speed data”) indicative of fluid flow variation (e.g., bubbling or turbulence), and determining from the high speed data at least one electrical property of the coating (e.g., of a portion of the coating on the distal portion of the static probe).

Effervescent nozzle for catalyst injection

A nozzle for catalyst injection for olefin polymerization is provided. In one or more embodiments the nozzle includes a first conduit including a body, a tapered section, and an injection tip. The nozzle also includes a second conduit having an inner surface and an outer surface. The first conduit is disposed about the second conduit defining a first annulus therebetween. The nozzle further includes a support member at least partially disposed about the outer surface of the first conduit defining a second annulus therebetween. The support member has a converging outer surface at a first end thereof.

Polymerization catalyst compositions

This invention relates to a catalyst composition suitable for a polymerization process comprising, in one embodiment, a particulate filler, mineral oil and at least one metal catalyst compound. In another embodiment, the particular filler is fumed. The catalyst Composition includes a Group 15-containing metal catalyst compound represented by the formula:  wherein M is a Group 4, 5 or 6 metal;  each X is independently selected from anionic leaving groups;  n is the oxidation slate of M;  m is the formal charge of a ligand comprising Y, Z and L;  Y, Z and L are Group 15 atoms; R 1 and R 2 are independently a C 10 to C 20 hydrocarbon group, or a heteroatom containing group wherein the heteroatom is a silicon, germanium, tin, lead, or phosphorus; R 3 is absent, a hydrogen, a group 14 atom containing group, a halogen, or a heteroatom containing group; R 4 and R 5 are independently an alkyl group, an aryl group, a substituted aryl group, a cyclic alkyl group, a substituted cyclic alkyl group, or a multiple ring system; and R 6 and R 7 are independently absent, a hydrogen, an alkyl group, a halogen, a heteroatom, a hydrocarbyl group, or a heteroatom containing group.

Method for preventing catalyst agglomeration based on production rate changes

A system and method for olefin polymerization is provided. The method includes polymerizing one or more olefins within a reactor having one or more injection tubes in fluid communication therewith, at least one of the one or more injection tubes having two or more concentric flow paths; flowing a catalyst through a first flow concentric path of the injection tube into the reactor; flowing one or more monomers through a second concentric flow path of the injection tube into the reactor; measuring rate of heat removal within the reactor; and adjusting the one or more monomers flow through the injection tube in response to the rate of heat removal in the reactor.

Continuity compositions and methods of making and using the same

Continuity compositions are provided as are methods of their preparation. The compositions comprise metal carboxylate salts and fatty amines and find advantageous use in olefin polymerization processes.

Catalyst composition, methods of preparation and use in a polymerization process

Polymerization catalyst compositions are provided as are methods of their preparation. The compositions comprise fatty amines and find advantageous use in olefin polymerization processes. The catalyst composition comprises at least one supported polymerization catalyst wherein the catalyst composition is modified with at least one fatty amine wherein the fatty amine is substantially free of particulate inorganic material.

Polymerization processes using reactor components suspended in hydrocarbon gels

A polymerization process is disclosed, including: providing a reactor component suspended in a hydrocarbon gel; introducing the reactor component to a polymerization reactor; and polymerizing an olefin in the polymerization reactor to form an olefin-based polymer. Another polymerization process is disclosed, including: providing a hydrocarbon gel comprising a reactor component suspended therein; combining the hydrogen gel with an additional reactor feed; introducing the combined mixture of the hydrocarbon gel and the additional reactor feed to a polymerization reactor; and polymerizing an olefin in the polymerization reactor to form an olefin-based polymer. A hydrocarbon gel is disclosed, including: a liquid hydrocarbon; a gelling agent; and a reactor component.

Methods for preparing catalyst systems with increased productivity

Methods for producing catalyst systems with increased productivity are disclosed. The methods may comprise providing a catalyst composition comprising a solvent and a single-site catalyst component, heating an inert gas to a temperature in a range of from about 100° C. to about 150° C., and spray drying the catalyst composition in the presence of the inert gas to form a spray-dried catalyst system. Additionally, the methods may comprise providing a catalyst composition comprising a solvent, an activator, a filler material, a metallocene catalyst, and a Group 15-containing catalyst; heating an inert gas to a temperature in a range of from about 100° C. to about 150° C.; and spray drying the catalyst composition in the presence of the inert gas to form a spray-dried catalyst system.

Bimodal polyethylene copolymer and film thereof

A bimodal copolymer comprises on average at least 90 weight-percent units derived from ethylene and at least 0.05 weight percent units derived from an α-olefin comonomer having from 4 to 10 carbon atoms, wherein the copolymer has the properties described herein.

Slurry catalyst flow splitters and methods of using the same

A system for feeding a slurry catalyst composition including: a primary slurry feed system comprising a primary slurry flow meter and a primary catalyst injection device, wherein the primary slurry flow meter measures a primary slurry catalyst composition flow rate to the primary catalyst injection device; and a secondary slurry feed system comprising a secondary slurry flow meter, a secondary carrier liquid, a secondary carrier liquid control device, and a secondary catalyst injection device, wherein the secondary slurry flow meter measures a secondary slurry catalyst composition flow rate to the secondary catalyst injection device, wherein the secondary carrier liquid control device controls a process parameter of the secondary slurry feed system based a ratio of the primary slurry catalyst composition flow rate to the secondary slurry catalyst composition flow rate.

SYSTEM FOR FEEDING A PASTE CATALYST COMPOSITION AND METHOD FOR CONTROLLING A PASTE CATALYST FLOW

sistema para alimentar uma composição de catalisador de pasta e método para controlar um fluxo de catalisador de pasta a presente invenção refere-se a um sistema para alimentar uma composição de catalisador de pasta que inclui: um sistema de alimentação de pasta primário que compreende um medidor de fluxo de pasta primário e um dispositivo de injeção de catalisador primário, em que o medidor de fluxo de pasta primário mede uma taxa de fluxo de composição de catalisador de pasta primária para o dispositivo de injeção de catalisador primário; e um sistema de alimentação de pasta secundário que compreende um medidor de fluxo de pasta secundário, um líquido condutor secundário, um dispositivo de controle de líquido condutor secundário, e um dispositivo de injeção de catalisador secundário, em que o medidor de fluxo de pasta secundário mede uma taxa de fluxo de composição de catalisador de pasta secundária para o dispositivo de injeção de catalisador secundário, em que o dispositivo de controle de líquido condutor secundário controla um parâmetro de processo do sistema de alimentação de pasta secundário com base em uma razão da taxa de fluxo de composição de catalisador de pasta primária para a taxa de fluxo de composição de catalisador de pasta secundária. System for Feeding a Pulp Catalyst Composition and Method for Controlling a Pulp Catalyst Flow The present invention relates to a system for feeding a pulp catalyst composition comprising: a primary pulp feed system comprising a meter primary pulp flow and a primary catalyst injection device, wherein the primary pulp flow meter measures a primary pulp catalyst composition flow rate to the primary catalyst injection device; and a secondary pulp feed system comprising a secondary pulp flow meter, a secondary conductive liquid, a secondary conductive liquid control device, and a secondary catalyst injection device, wherein the secondary pulp flow meter measures a secondary pulp catalyst composition flow rate for the ...

Flow dividers for suspended catalyst and their use procedures

1. Un sistema para alimentar una composición de catalizador en suspensión que comprende:(a) un sistema de alimentación de suspensión primaria que comprende un caudalímetro de suspensión primariay un dispositivo de inyección de catalizador primario, en el que el caudalímetro de suspensión primaria mide uncaudal de la composición de catalizador primario al dispositivo de inyección de catalizador primario; y(b) un sistema de alimentación de suspensión secundario que comprende un caudalímetro de suspensiónsecundario, un vehículo líquido secundario, un dispositivo de control de vehículo líquido secundario y undispositivo de inyección de catalizador secundario, en el que el caudalímetro de suspensión secundario mide uncaudal de la composición de catalizador en suspensión secundario al dispositivo de inyección de catalizadorsecundario,en el que el dispositivo de control de vehículo líquido secundario controla un parámetro de procedimiento del sistemade alimentación de suspensión secundario basado en una proporción del caudal de la composición de catalizador ensuspensión primario al caudal de la composición de catalizador en suspensión secundario, en el que el sistema dealimentación de suspensión secundario comprende adicionalmente un caudalímetro de vehículo líquido secundario,un controlador de vehículo líquido secundario, y un controlador de flujo de suspensión secundario, en el que elparámetro de procedimiento controlado por el dispositivo de control de vehículo líquido secundario es un caudal devehículo líquido secundario medido por el caudalímetro de vehículo líquido secundario, en el que el controlador devehículo líquido secundario controla el dispositivo de control de vehículo líquido secundario basándose en el caudalde vehículo líquido secundario y un punto de referencia de flujo de vehículo secundario desde el controlador de flujode suspensión secundario. 1. A system for feeding a suspension catalyst composition comprising: (a) a primary suspension feeding system ...

Slurry catalyst flow splitters and methods of using the same

A system for feeding a slurry catalyst composition including: a primary slurry feed system comprising a primary slurry flow meter and a primary catalyst injection device, wherein the primary slurry flow meter measures a primary slurry catalyst composition flow rate to the primary catalyst injection device; and a secondary slurry feed system comprising a secondary slurry flow meter, a secondary carrier liquid, a secondary carrier liquid control device, and a secondary catalyst injection device, wherein the secondary slurry flow meter measures a secondary slurry catalyst composition flow rate to the secondary catalyst injection device, wherein the secondary carrier liquid control device controls a process parameter of the secondary slurry feed system based a ratio of the primary slurry catalyst composition flow rate to the secondary slurry catalyst composition flow rate.

Slurry catalyst flow splitters and methods of using the same

A system for feeding a slurry catalyst composition including: a primary slurry feed system comprising a primary slurry flow meter and a primary catalyst injection device, wherein the primary slurry flow meter measures a primary slurry catalyst composition flow rate to the primary catalyst injection device; and a secondary slurry feed system comprising a secondary slurry flow meter, a secondary carrier liquid, a secondary carrier liquid control device, and a secondary catalyst injection device, wherein the secondary slurry flow meter measures a secondary slurry catalyst composition flow rate to the secondary catalyst injection device, wherein the secondary carrier liquid control device controls a process parameter of the secondary slurry feed system based a ratio of the primary slurry catalyst composition flow rate to the secondary slurry catalyst composition flow rate.

Method of polymerization

This invention relates to a polymerization process comprising combining an olefin in the gas or slurry phase with a spray dried catalyst comprising an activator, a particulate filler and a metal catalyst compound.

Methods of modifying the melt flow ratio and/or swell of polyethylene resins

Methods of making polyethylene resins are provided. More particularly methods of modifying the melt flow ratio and swell characteristics of polyethylene resins are provided.

Polyethylene copolymer resins and films

An ethylene/alpha-olefin copolymer that can be synthesized in a fluidized-bed, gas phase polymerization reactor and made into a blown film. The ethylene/alpha-olefin copolymer is characterized by a bubble stability-effective combination of properties comprising density, melt flow ratio ("I21/I5"), and melt storage modulus G' (G"=3,000 Pa). The synthesis in the FB-GPP reactor is characterized by a property-imparting-effective combination of operating conditions comprising reactor bed temperature and H2/C2 gas molar ratio. An embodiment of the blown film consisting of the ethylene/alpha-olefin copolymer is characterized by enhanced bubble stability. A method of making the ethylene/alpha-olefin copolymer. A film comprising the ethylene/alpha-olefin copolymer. A method of making the film. A manufactured article comprising the film.

Polyethylene copolymer resins and films

An ethylene/alpha-olefin copolymer that can be synthesized in a fluidized-bed, gas phase polymerization reactor and made into a blown film. The ethylene/alpha-olefin copolymer is characterized by a bubble stability-effective combination of properties comprising density, melt flow ratio ("I21/I5"), and melt storage modulus G' (G"=3,000 Pa). The synthesis in the FB-GPP reactor is characterized by a property-imparting-effective combination of operating conditions comprising reactor bed temperature and H2/C2 gas molar ratio. An embodiment of the blown film consisting of the ethylene/alpha-olefin copolymer is characterized by enhanced bubble stability. A method of making the ethylene/alpha-olefin copolymer. A film comprising the ethylene/alpha-olefin copolymer. A method of making the film. A manufactured article comprising the film.

Use of a olefin polymerisation process

Producing polyolefin products

Controlling reactor split and a product parameter

A method including a) polymerizing at least one monomer in a gas phase reactor in the presence of a supported multimodal catalyst system to form a multimodal polyethylene product having a reactor split equal to respective weight fractions of resin components in the polyethylene product; b) applying a predetermined formula for a product parameter of the multimodal polyethylene product; c) obtaining incorporation data and production rate data from the reaction based upon the predetermined formula; d) determining an actual hydrogen leading indicator; e) comparing the actual hydrogen leading indicator to a target value for a hydrogen leading indicator to determine a deviation of the actual hydrogen leading indicator from the target value; and f) adjusting an amount of a catalyst precursor being fed to the gas phase reactor to control reactor split and a product parameter.

Bimodal polyethylene

A bimodal polyethylene composition made with a bimodal catalyst system, wherein the bimodal polyethylene composition has from greater than 0 to 14 weight percent of polyethylene polymers having a weight-average molecular weight of from greater than 0 to 10,000 grams per mol, products made therefrom, methods of making and using same, and articles containing same.

Multimodal polyethylene composition

A bimodal polyethylene composition, products made therefrom, methods of making and using same, and articles, including bottle caps and closures, containing same.

Polyethylene composition

A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same.

Bimodal polyethylene copolymer and film thereof

A bimodal ethylene- co -1-hexene copolymer consisting essentially of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a unique melt property space defined by a combination of high-load melt index, melt flow ratio, and melt elasticity properties. A blown film consisting essentially of the bimodal ethylene- co -1-hexene copolymer. A method of synthesizing the bimodal ethylene- co -1-hexene copolymer. A method of making the blown film. A manufactured article comprising the bimodal ethylene- co -1-hexene copolymer.

Bimodal polyethylene copolymer composition and pipe made thereof

A bimodal ethylene-co-l-hexene copolymer composition consisting of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a melt property performance defined by a combination of melt index (5 kg), melt strength, and, optionally, shear thinning properties, and, when in solid form, is characterized by a slow crack growth property performance defined by a combination of strain hardening modulus and accelerated full-notch creep test performance. A pipe consisting of the bimodal ethylene-co-l-hexene copolymer composition. A method of synthesizing the bimodal ethylene-co-l-hexene copolymer composition. A method of making the pipe. A manufactured article, which is not a pipe, comprising the bimodal ethylene-co-l-hexene copolymer composition.

Bimodal polyethylene copolymer and film thereof

A bimodal ethylene- co -1-butene copolymer consisting essentially of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a unique melt property space defined by a combination of high-load melt index, melt flow ratio, and melt elasticity properties. A (blown) film consisting essentially of the bimodal ethylene- co -1-butene copolymer and having improved properties. Methods of synthesizing the bimodal ethylene- co -1-butene copolymer and making the blown film. A manufactured article comprising the bimodal ethylene- co -1- butene copolymer.

Method of polymerization

This invention relates to a polymerization process comprising combining an olefin in the gas or slurry phase with a spray dried catalyst comprising an activator, a particulate filler and a metal catalyst compound.

Continuity compositions and methods of making and using the same

Continuity compositions are provided as are methods of their preparation. The compositions comprise at least one metal carboxylate salt which is modified with at least one molten fatty amine. These compositions find advantageous use in olefin polymerization processes.

Continuity compositions and olefin polymerisation method using the same

The present invention relates to a process for producing a continuity composition, comprising the step of contacting at least one metal carboxylate salt with at least one molten fatty amine.

Polymer flow index modifier

Embodiments of the present disclosure are directed towards method for modifying a polymer flow index. As an example, a method for modifying a polymer flow index can include providing monomers to a polymerization reactor, providing a chromium catalyst to the polymerization reactor, and providing an active amount of a flow index modifier to the polymerization reactor, wherein the flow index modifier is selected from carbon dioxide, carbon monoxide, 2,4-hexadiene, and combinations thereof.

Methods of integrating aluminoxane production into catalyst production

Methods for integrating aluminoxane production into catalyst production are disclosed.

Methods for preparing catalyst systems with increased productivity

Methods for producing catalyst systems with increased productivity are disclosed. The methods may comprise providing a catalyst composition comprising a solvent and a single-site catalyst component, heating an inert gas to a temperature in a range of from about 100°C to about 150°C, and spray drying the catalyst composition in the presence of the inert gas to form a spray-dried catalyst system. Additionally, the methods may comprise providing a catalyst composition comprising a solvent, an activator, a filler material, a metallocene catalyst, and a Group 15 -containing catalyst; heating an inert gas to a temperature in a range of from about 100°C to about 150°C; and spray drying the catalyst composition in the presence of the inert gas to form a spray-dried catalyst system.

Polyethylene resins

Polyethylene resins having variable swell and excellent physical properties are provided. The polyethylene resins may be advantageously prepared using a single catalyst system.

Polyethylene composition

A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same.

Bimodal polyethylene

Provided are various bimodal polyethylene, including but not limited to a bimodal polyethylene for a pipe having a density of from 0.9340 to 0.9470 gram/cubic centimeters (g/ccm), a melt index (I2) of from 0.1 to 0.7 gram/10 minute, a melt flow ratio (I21/I2) of from 20 to 90. The bimodal polyethylene includes a high molecular weight polyethylene component and a low molecular weight polyethylene component which are a reaction product of a polymerization process performed in a single reactor and that employs a bimodal polymerization catalyst system. The bimodal polymerization catalyst system includes a bimodal catalyst system of bis(2-pentamethylphenylamido)ethyl)amine Zirconium dibenzyl and either (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)Zirconium dichloride or (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)zirconium dimethyl in a 3.0:1 molar ratio; and a trim catalyst of (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)Zirconium dichloridedimethyl in heptane added to adjust melt flow ratio of the bimodal polyethylene.

Polyethylene composition

A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same.

Bimodal polyethylene

A bimodal polyethylene composition made with a bimodal catalyst system, wherein the bimodal polyethylene composition has from greater than 0 to 14 weight percent of polyethylene polymers having a weight-average molecular weight of from greater than 0 to 10,000 grams per mol, products made therefrom, methods of making and using same, and articles containing same.

Carbon black-containing bimodal polyethylene composition

A carbon black-containing bimodal polyethylene composition, products made therefrom, methods of making and using same, and articles containing same.

Bimodal polyethylene copolymer and film thereof

A bimodal ethylene- co -1-hexene copolymer consisting essentially of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a unique melt property space defined by a combination of high-load melt index, melt flow ratio, and melt elasticity properties. A blown film consisting essentially of the bimodal ethylene- co -1-hexene copolymer. A method of synthesizing the bimodal ethylene- co -1-hexene copolymer. A method of making the blown film. A manufactured article comprising the bimodal ethylene- co -1-hexene copolymer.

Bimodal polyethylene copolymer and film thereof

A bimodal ethylene-co-1-butene copolymer consisting essentially of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a unique melt property space defined by a combination of high-load melt index, melt flow ratio, and melt elasticity properties. A (blown) film consisting essentially of the bimodal ethylene-co-1-butene copolymer and having improved properties. Methods of synthesizing the bimodal ethylene-co-1-butene copolymer and making the blown film. A manufactured article comprising the bimodal ethylene-co-1- butene copolymer.

Method of changing melt rheology property of bimodal polyethylene polymer

A method of independently changing a melt rheology property value of a bimodal polyethylene polymer being made using a bimodal catalyst system in a single gas phase polymerization reactor. The method comprises process conditions comprising alkane(s) in the reactor. The method comprises a bimodal catalyst system that is characterized by an inverse response to alkane(s) concentration. The method comprises changing concentration of the alkane(s) in the reactor by an amount sufficient to effect a measurable change in the melt rheology property value; wherein the bimodal catalyst system is characterized by an inverse response to alkane(s) concentration such that when the alkane(s) concentration is increased, the melt rheology property value of the resulting bimodal polyethylene polymer is decreased, and when the alkane(s) concentration is decreased, the melt rheology property value of the resulting bimodal polyethylene polymer is increased.

Bimodal polyethylene copolymer composition and pipe made thereof

A bimodal ethylene-co-l-hexene copolymer composition consisting of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a melt property performance defined by a combination of melt index (5 kg), melt strength, and, optionally, shear thinning properties, and, when in solid form, is characterized by a slow crack growth property performance defined by a combination of strain hardening modulus and accelerated full-notch creep test performance. A pipe consisting of the bimodal ethylene-co-l-hexene copolymer composition. A method of synthesizing the bimodal ethylene-co-l-hexene copolymer composition. A method of making the pipe. A manufactured article, which is not a pipe, comprising the bimodal ethylene-co-l-hexene copolymer composition.

Bimodal polyethylene copolymers for pe-80 pipe applications

A bimodal poly(ethylene-co-1-hexene) copolymer composition, methods of making and using, and manufactured articles made therefrom and uses thereof.

Polyethylene composition

A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same.

Polyethylene composition

A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same.

Polyethylene composition

The invention relates to a bimodal linear medium density polyethylene composition comprising a lower molecular weight (LMW) polyethylene component and a higher molecular weight (HMW) polyethylene component, wherein each of the LMW and HMW polyethylene components comprises ethylene-derived monomeric units and (C 3 -C 20 )alpha-olefin-derived comonomeric units; and wherein the bimodal linear medium density polyethylene composition is characterized by each of limitations (a) to (d): (a) a resolved bimodality showing in a chromatogram of gel permeation chromatography (GPC) of the bimodal linear medium density polyethylene composition, wherein the chromatogram shows a peak representing the HMW polyethylene component, a peak representing the LMW polyethylene component, and a resolved bimodal molecular weight distribution characterized by a local minimum in a range of Log(molecular weight) ("Log(MW)") 1.5 to 5.0 between the peak representing the HMW polyethylene component and the peak representing the LMW polyethylene component, measured according to Bimodality Test Method; (b) a molecular mass dispersity (M w /M n ), Ð M , from 5 to 30.1, measured according to Gel Permeation Chromatography (GPC) Test Method; (c) no measurable amount of long chain branching per 1,000 carbon atoms ("LCB Index"), measured according to LCB Test Method; and (d) a density from 0.930 to 0.950 gram per cubic centimeter (g/cm 3 ), measured according to ASTM D792-13 Method B.

Bimodal polyethylene

A bimodal polyethylene composition made with a bimodal catalyst system, wherein the bimodal polyethylene composition has from greater than 0 to 14 weight percent of polyethylene polymers having a weight-average molecular weight of from greater than 0 to 10,000 grams per mol, products made therefrom, methods of making and using same, and articles containing same.

METHOD FOR INTEGRATING ALUMINOXAN PRODUCTION IN THE PRODUCTION OF A CATALYST

métodos de integração da produção de aluminoxano na produção de catalisador. a presente invenção refere-se a métodos para integrar a produção de aluminoxano na produção de um catalisador. methods of integrating the production of aluminoxane in the production of catalyst. the present invention relates to methods for integrating the production of aluminoxane into the production of a catalyst.

Methods of controlling polyolefin melt index

The use of induced condensing agent (ICA) in fluidized bed gas phase reactor systems enables higher production rates but can affect the resulting polyolefins melt index. The effect the increased ICA concentration may have on a melt index may be counteracted, if necessary, by altering the concentration of olefin monomer within the reactor system.

Membrane and mixture comprising a thermoplastic elastomer

A thermoplastic elastomer consisting essentially of a copolymer comprising a mixture of ethylene; one or more alpha-olefins having 3 to 12 carbon atoms; and, optionally, a diene, said copolymer being in an uncrosslinked state and having a crystallinity in the range of about 2 to about 40 percent by weight based on the weight of the copolymer wherein about 15 to about 85 percent by weight of the crystallinity melts at a temperature above 80° C.; about 15 to about 85 percent by weight of the crystallinity melts at a temperature below 80° C.; and the crystalline melting temperatures differ by at least about 30° C.

Process for producing polymer in a gas phase using soluble unsupported catalysts.

A process for producing polymer in a gas phase polymerization reaction which comprises: a) continuously introducing a gaseous stream comprising one or more monomers having from two to twelve carbon atoms into a reaction zone; b) introducing a polymerization catalyst into said reaction zone having a droplet size in the range of from 1 to about 1,000 microns comprising (i) a transition metal compound selected from Groups IIIB to VIII and (ii) an organometallic compound wherein (i) and (ii) are in liquid form; and c) withdrawing polymeric product from said reaction zone. Gas phase polymerisation processes utilise unsupported soluble transition metal coordination catalysts, as a solution.

Method of obtaining polymers

Gas phase polymerization processes are disclosed which utilize unsupported soluble transition metal coordination catalysts. The catalysts are introduced into the reactor as a solution.

Effervescent nozzle for catalyst injection

A nozzle for catalyst injection for olefin polymerization is provided. In one or more embodiments the nozzle includes a first conduit including a body, a tapered section, and an injection tip. The nozzle also includes a second conduit having an inner surface and an outer surface. The first conduit is disposed about the second conduit defining a first annulus therebetween. The nozzle further includes a support member at least partially disposed about the outer surface of the first conduit defining a second annulus therebetween. The support member has a converging outer surface at a first end thereof.

Method for Preventing Catalyst Agglomeration Based on Production Rate Changes

A system and method for olefin polymerization is provided. The method includes polymerizing one or more olefins within a reactor having one or more injection tubes in fluid communication therewith, at least one of the one or more injection tubes having two or more concentric flow paths; flowing a catalyst through a first flow concentric path of the injection tube into the reactor; flowing one or more monomers through a second concentric flow path of the injection tube into the reactor; measuring rate of heat removal within the reactor; and adjusting the one or more monomers flow through the injection tube in response to the rate of heat removal in the reactor.

Method for preventing catalyst agglomeration based on production rate changes

A system and method for olefin polymerization is provided. The method includes polymerizing one or more olefins within a reactor having one or more injection tubes in fluid communication therewith, at least one of the one or more injection tubes having two or more concentric flow paths; flowing a catalyst through a first flow concentric path of the injection tube into the reactor; flowing one or more monomers through a second concentric flow path of the injection tube into the reactor; measuring rate of heat removal within the reactor; and adjusting the one or more monomers flow through the injection tube in response to the rate of heat removal in the reactor.

Effervescent nozzle for catalyst injection

A nozzle for catalyst injection for olefin polymerization is provided. In one or more embodiments the nozzle includes a first conduit including a body, a tapered section, and an injection tip. The nozzle also includes a second conduit having an inner surface and an outer surface. The first conduit is disposed about the second conduit defining a first annulus therebetween. The nozzle further includes a support member at least partially disposed about the outer surface of the first conduit defining a second annulus therebetween. The support member has a converging outer surface at a first end thereof.

Methods of controlling polyolefin melt index

The use of induced condensing agent (ICA) in fluidized bed gas phase reactor systems enables higher production rates but can affect the resulting polyolefins melt index. The effect the increased ICA concentration may have on a melt index may be counteracted, if necessary, by altering the concentration of olefin monomer within the reactor system.

Polyethylene resins

Polyethylene resins having variable swell and excellent physical properties are provided. The polyethylene resins may be advantageously prepared using a single catalyst system.

Polyethylene composition

bimodal copolymer composition, method of synthesizing bimodal copolymer composition, tube, method of making a tube, and manufactured article

COMPOSIÇÃO DE COPOLÍMERO BIMODAL, MÉTODO PARASINTETIZAR A COMPOSIÇÃO DE COPOLÍMERO BIMODAL, TUBO,MÉTODO PARA SE PRODUZIR UM TUBO, E, ARTIGO FABRICADO. Trata-se de uma composição de copolímero bimodal de etileno-co-1-hexeno que consiste essencialmente em um componente de maior peso molecular e um componente de menor peso molecular e, quando na forma fundida a 190 graus Celsius, é caracterizada por um desempenho de propriedade de fusão definido por uma combinação de índice de fusão (5 kg), resistência à fusão e, opcionalmente, propriedades de desbaste de cisalhamento e, quando na forma sólida, é caracterizado por um desempenho de propriedade de crescimento de rachadura lento definido por uma combinação de módulo de endurecimento por deformação e desempenho de teste de fluência de entalhe completo acelerado. Um filme soprado que consiste, essencialmente, na composição de copolímero bimodal de etileno-co-1-hexeno. Um método para sintetizar a composição de copolímero bimodal de etileno-co-1-hexeno. Um método para se produzir o filme soprado. Um artigo fabricado que compreende a composição de copolímero bimodal de etileno-co-1-hexeno. BIMODAL COPOLYMER COMPOSITION, METHOD TO SYNTHETIZE THE BIMODAL COPOLYMER COMPOSITION, TUBE, METHOD TO PRODUCE A TUBE, AND, MANUFACTURED ARTICLE. It is a bimodal ethylene-co-1-hexene copolymer composition that consists essentially of a higher molecular weight component and a lower molecular weight component and, when in molten form at 190 degrees Celsius, it is characterized by performance of melt property defined by a combination of melt index (5 kg), melt strength and optionally shear grinding properties and, when in solid form, is characterized by a slow crack growth property performance defined by a combination of strain hardening modulus and accelerated full notch creep test performance. A blown film consisting essentially of the bimodal copolymer composition of ethylene-co-1-hexene. A method to synthesize the bimodal copolymer ...

Methods of modifying the melt flow ratio and/or swell of polyethylene resins

Methods of making polyethylene resins are provided. More particularly methods of modifying the melt flow ratio and swell characteristics of polyethylene resins are provided.

Method and Apparatus for Monitoring Electrical Properties of Polymerization Reactor Wall Film

Disclosed is a method for using at least one static probe during polymerization in a fluid bed polymerization reactor system to monitor a coating on a surface of the reactor system and a distal portion of each static probe, wherein the coating is exposed to flowing fluid within the reactor system during the reaction. The surface may be a reactor bed wall (exposed to the reactor's fluid bed) and the coating is exposed to flowing, bubbling fluid within the fluid bed during the reaction. The method may include steps of: during the polymerization reaction, operating the static probe to generate a sequence of data values (“high speed data”) indicative of fluid flow variation (e.g., bubbling or turbulence), and determining from the high speed data at least one electrical property of the coating (e.g., of a portion of the coating on the distal portion of the static probe).

Methods of controlling polyolefin melt index while increasing catalyst productivity

The catalyst productivity of a polyolefin catalyst in the methods disclosed herein may be increased by increasing the concentration of an induced condensing agent (ICA) in the reactor system. The effect the increased ICA concentration may have on a melt index may be counteracted, if necessary, in various ways.

Bimodal polyethylene

Polymerization catalysts with improved ethylene enchainment

Biomodal polymerization catalysts

The invention relates to a bimodal polymerization catalyst system comprising: a non-metallocene olefin polymerization catalyst; and a zirconocene catalyst of Formula I: where R 4 is independently a C 1 to C 20 alkyl, aryl or aralkyl group or a hydrogen, where R 3 is a C 1 to C 20 alkyl, aryl or aralkyl group, and where each X is independently a halide, C 1 to C 20 alkyl, aralkyl group or hydrogen, and where: R 1 is a C 1 alkyl and R 2 is a C 3 alkyl.

Method for controlling bimodal catalyst activity during polymerization

A method of performing a polymerization reaction in a gas phase polymerization reactor to produce a bimodal polymer while controlling activity of a bimodal polymerization catalyst composition in the reactor by controlling concentration of at least one induced condensing agent ('ICA') in the reactor is provided. In some embodiments, the ICA is isopentane (or another hydrocarbon compound) and the bimodal catalyst composition includes a Group 15 and metal containing catalyst compound (or other HMW catalyst for catalyzing polymerization of a high molecular weight fraction of the product), and a metallocene catalyst compound (or other LMW catalyst for catalyzing polymerization of a low molecular weight fraction of the product).

Polymerization Method

método de polimerização a presente invenção refere-se a um método para realização de uma reação de polimerização em um reator de polimerização de fase de gás para produzir um polímero bimodal enquanto controlando a atividade de uma composição de catalisador de polimerização bimodal no reator ao controlar a concentração de pelo menos um agente de condensação induzida (‘ica’) no reator é provido. em algumas modalidades, o ica é isopentano (ou outro composto hidrocarbono) e a composição de catalisador bimodal inclui um composto de catalisador contendo grupo 15 e metal (ou outro catalisador de hmw para polimerização com catálise de uma fração de peso molecular alto do produto) e um composto de catalisador de metaloceno (ou outro catalisador de lmw para polimerização com catálise de uma fração e peso molecular baixo do produto). Polymerization Method The present invention relates to a method for carrying out a polymerization reaction in a gas phase polymerization reactor to produce a bimodal polymer while controlling the activity of a bimodal polymerization catalyst composition in the reactor by controlling the concentration of at least one induced condensing agent ('ica') in the reactor is provided. in some embodiments, the ica is isopentane (or other hydrocarbon compound) and the bimodal catalyst composition includes a group 15 and metal containing catalyst compound (or other hmw catalyst for catalyzed polymerization of a high molecular weight fraction of the product) and a metallocene catalyst compound (or other lmw catalyst for catalyzed polymerization of a low molecular weight fraction of the product).

Method for Controlling Bimodal Catalyst Activity During Polymerization

A method of performing a polymerization reaction in a gas phase polymerization reactor to produce a bimodal polymer while controlling activity of a bimodal polymerization catalyst composition in the reactor by controlling concentration of at least one induced condensing agent (‘ICA’) in the reactor is provided. In some embodiments, the ICA is isopentane (or another hydrocarbon compound) and the bimodal catalyst composition includes a Group 15 and metal containing catalyst compound (or other HMW catalyst for catalyzing polymerization of a high molecular weight fraction of the product), and a metallocene catalyst compound (or other LMW catalyst for catalyzing polymerization of a low molecular weight fraction of the product).

Polymer flow index modifier

Embodiments of the present disclosure are directed towards method for modifying a polymer flow index. As an example, a method for modifying a polymer flow index can include providing monomers to a polymerization reactor, providing a chromium catalyst to the polymerization reactor, and providing an active amount of a flow index modifier to the polymerization reactor, wherein the flow index modifier is selected from carbon dioxide, carbon monoxide, 2,4-hexadiene, and combinations thereof.

Method for preventing catalyst agglomeration based on production rate changes

Method of polymerization

This invention relates to a polymerization process comprising combining an olefin in the gas or slurry phase with a spray dried catalyst comprising an activator, a particulate filler and a metal catalyst compound.